IPC-Stelle: B01D 59/20 [Version 2006.01]

SymbolTypTitel
BSKSECTION B — PERFORMING OPERATIONS; TRANSPORTING
B01USKSEPARATING; MIXING
B01KLPHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL (furnaces, kilns, ovens, retorts, in general F27)
B01DUKLSEPARATION (separating solids from solids by wet methods B03B, B03D, by pneumatic jigs or tables B03B, by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B 9/02; treatment of water C02F, e.g. softening by ion-exchange C02F 1/42; arrangement or mounting of filters in air-conditioning, air-humidification or ventilation F24F 13/28) [5]
B01D 1/00HGREvaporating (removal of incrustation B08B; preparation of starch C08B 30/00; sugar industry C13; prevention of incrustation C23F; drying solid materials or objects by evaporating liquids therefrom F26)
B01D 1/02UGR1
.Evaporators with heating coils
B01D 1/04UGR1
.Evaporators with horizontal tubes
B01D 1/06UGR1
.Evaporators with vertical tubes
B01D 1/08UGR2
. .with short tubes (B01D 1/12 takes precedence)
B01D 1/10UGR2
. .with long tubes, e.g. Kestner evaporators (B01D 1/12 takes precedence)
B01D 1/12UGR2
. .and forced circulation
B01D 1/14UGR1
.with heated gases or vapours in contact with the liquid
B01D 1/16UGR1
.by spraying (B01D 1/22 takes precedence)
B01D 1/18UGR2
. .to obtain dry solids (B01D 1/24 takes precedence)
B01D 1/20UGR2
. .Sprayers (in general B05B)
B01D 1/22UGR1
.by bringing a thin layer of the liquid into contact with a heated surface
B01D 1/24UGR2
. .to obtain dry solids
B01D 1/26UGR1
.Multiple-effect evaporating
B01D 1/28UGR1
.with vapour compression
B01D 1/30UGR1
.Accessories for evaporators
B01D 3/00HGRDistillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping (gas chromatography B01D 15/08; destructive distillation C10B; preparation of alcoholic beverages by distillation C12G 3/12) [2]
B01D 3/02UGR1
.in boilers or stills [2]
B01D 3/04UGR1
.pipe stills
B01D 3/06UGR1
.Flash distillation [2]
B01D 3/08UGR1
.in rotating vessels; Atomisation on rotating discs (B01D 3/10 takes precedence)
B01D 3/10UGR1
.Vacuum distillation (B01D 3/12 takes precedence) [2]
B01D 3/12UGR1
.Molecular distillation [2]
B01D 3/14UGR1
.Fractional distillation
B01D 3/16UGR2
. .Fractionating columns in which vapour bubbles through liquid (packing elements B01J 19/30, B01J 19/32)
B01D 3/18UGR3
. . .with horizontal bubble plates
B01D 3/20UGR4
. . . .Bubble caps; Risers for vapour; Discharge pipes for liquid
B01D 3/22UGR3
. . .with horizontal sieve plates or grids; Construction of sieve plates or grids
B01D 3/24UGR3
. . .with sloping plates or elements mounted stepwise
B01D 3/26UGR2
. .Fractionating columns in which vapour and liquid flow pass each other, or in which the fluid is sprayed into the vapour, or in which a two-phase mixture is passed in one direction
B01D 3/28UGR3
. . .Fractionating columns with surface contact and vertical guides, e.g. film action
B01D 3/30UGR2
. .Fractionating columns with movable parts or in which centrifugal movement is caused
B01D 3/32UGR2
. .Other features of fractionating columns
B01D 3/34UGR1
.with one or more auxiliary substances
B01D 3/36UGR2
. .Azeotropic distillation
B01D 3/38UGR2
. .Steam distillation
B01D 3/40UGR2
. .Extractive distillation
B01D 3/42UGR1
.Regulation; Control
B01D 5/00HGRCondensation of vapours; Recovering volatile solvents by condensation (B01D 8/00 takes precedence; condensers F28B) [3]
B01D 7/00HGRSublimation (B01D 8/00 takes precedence; freeze-drying F26)
B01D 7/02UGR1
.Crystallisation directly from the vapour phase (into single crystals C30B 23/00) [2]
B01D 8/00HGRCold traps; Cold baffles (pumps for evacuating by condensing or freezing F04B 37/08) [3]
B01D 9/00HGRCrystallisation (crystallisation directly from the vapour phase B01D 7/02; making single crystals C30B)
B01D 9/02UGR1
.from solutions
B01D 9/04UGR2
. .concentrating solutions by removing frozen solvent therefrom
B01D 11/00HGRSolvent extraction
B01D 11/02UGR1
.of solids
B01D 11/04UGR1
.of solutions which are liquid
B01D 12/00HGRDisplacing liquid, e.g. from wet solids or from dispersions of liquids or from solids in liquids, by means of another liquid
B01D 15/00HGRSeparating processes involving the treatment of liquids with solid sorbents (using liquid sorbents B01D 11/00; ion exchange processes or materials, sorbent materials in general B01J, e.g. sorbents for chromatography B01J 20/281; for investigating or analysing materials G01N 30/00); Apparatus therefor [4]
B01D 15/02UGR1
.with moving adsorbents
B01D 15/04UGR1
.with ion-exchange materials as adsorbents (B01D 15/36 takes precedence) [1, 2006.01]
B01D 15/08UGR1
.Selective adsorption, e.g. chromatography
B01D 15/10UGR2
. .characterised by constructional or operational features [2006.01]
B01D 15/12UGR3
. . .relating to the preparation of the feed [2006.01]
B01D 15/14UGR3
. . .relating to the introduction of the feed to the apparatus [2006.01]
B01D 15/16UGR3
. . .relating to the conditioning of the fluid carrier [2006.01]
B01D 15/18UGR3
. . .relating to flow patterns [2006.01]
B01D 15/20UGR3
. . .relating to the conditioning of the sorbent material [2006.01]
B01D 15/22UGR3
. . .relating to the construction of the column [2006.01]
B01D 15/24UGR3
. . .relating to the treatment of the fractions to be distributed [2006.01]
B01D 15/26UGR2
. .characterised by the separation mechanism [2006.01]
B01D 15/30UGR3
. . .Partition chromatography [2006.01]
B01D 15/32UGR3
. . .Bonded phase chromatography, e.g. with normal bonded phase, reversed phase or hydrophobic interaction [2006.01]
B01D 15/34UGR3
. . .Size-selective separation, e.g. size-exclusion chromatography; Gel filtration; Permeation [2006.01]
B01D 15/36UGR3
. . .involving ionic interaction, e.g. ion-exchange, ion-pair, ion-suppression or ion-exclusion [2006.01]
B01D 15/38UGR3
. . .involving specific interaction not covered by one or more of groups B01D 15/30-B01D 15/36, e.g. affinity, ligand exchange or chiral chromatography [2006.01]
B01D 15/40UGR3
. . .using supercritical fluid as mobile phase or eluent [2006.01]
B01D 15/42UGR2
. .characterised by the development mode, e.g. by displacement or by elution [2006.01]
B01D 17/00HGRSeparation of liquids, not provided for elsewhere, e.g. by thermal diffusion (devices for separating or removing fatty or oily substances or similar floating material from water, waste water, or sewage C02F 1/40; cleaning or keeping clear the surface of open water from oil or like materials E02B 15/04; arrangements for separating lubricants from refrigerants F25B 43/02)
B01D 17/02UGR1
.Separation of non-miscible liquids
B01D 17/022UGR2
. .by contact with a preferentially wettable solid [4]
B01D 17/025UGR2
. .by gravity, in a settling tank [4]
B01D 17/028UGR3
. . .provided with a set of baffles [4]
B01D 17/032UGR3
. . .provided with special equipment for removing at least one of the separated liquids [4]
B01D 17/035UGR2
. .by using gas-bubbles or moving solids introduced into the mixture [4]
B01D 17/038UGR2
. .by centrifugal force (centrifuges B04B; cyclones B04C) [4]
B01D 17/04UGR2
. .Breaking emulsions
B01D 17/05UGR3
. . .by chemical treatment [4]
B01D 17/06UGR1
.Separation of liquids from each other by electricity
B01D 17/09UGR1
.by thermal diffusion [4]
B01D 17/12UGR1
.Auxiliary equipment particularly adapted for use with liquid-separating apparatus, e.g. control circuits [4]
B01D 19/00HGRDegasification of liquids
B01D 19/02UGR1
.Foam dispersion or prevention (during boiling B01B 1/02; during fermentation C12)
B01D 19/04UGR2
. .by addition of chemical substances
B01D 21/00HGRSeparation of suspended solid particles from liquids by sedimentation (differential sedimentation B03D 3/00; devices for separating or removing fatty or oily substances or similar floating material from water, waste water, or sewage C02F 1/40)
B01D 21/01UGR1
.using flocculating agents (for purifying water C02F 1/52; for liquid radioactive waste G21F 9/10) [2]
B01D 21/02UGR1
.Settling tanks [4]
B01D 21/04UGR2
. .with moving scrapers
B01D 21/06UGR3
. . .with rotating scrapers
B01D 21/08UGR2
. .provided with flocculating compartments
B01D 21/18UGR1
.Construction of the scrapers or the driving mechanisms for settling tanks
B01D 21/20UGR2
. .Driving mechanisms
B01D 21/22UGR2
. .Safety mechanisms
B01D 21/24UGR1
.Feed or discharge mechanisms for settling tanks
B01D 21/26UGR1
.Separation of sediment aided by centrifugal force (centrifuges B04B; cyclones B04C)
B01D 21/28UGR1
.Mechanical auxiliary equipment for acceleration of sedimentation, e.g. by vibrators or the like [4]
B01D 21/30UGR1
.Control equipment [4]
B01D 21/32UGR2
. .Density control of clear liquid or sediment, e.g. optical control [4]
B01D 21/34UGR2
. .Regulation of feed distribution; Regulation of liquid level [4]
B01D 24/00ZWFiltration; Filtering material, regeneration thereof (blood or infusion liquid filters A61M 5/165; screens or sieves per seB07B 1/00; extrusion filters B29C 47/68; filtering spinning solution or melt D01D 1/10; filtration of lubricants F16N 39/06) [2]
B01D 24/00HGRFilters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof (B01D 27/02 takes precedence) [5]
B01D 24/02UGR1
.with the filter bed stationary during the filtration [5]
B01D 24/04UGR2
. .the filtering material being clamped between pervious fixed walls (B01D 24/10, B01D 24/20 take precedence) [5]
B01D 24/06UGR3
. . .the pervious walls comprising a series of louvres or slots [5]
B01D 24/08UGR3
. . .the filtering material being supported by at least two pervious coaxial walls [5]
B01D 24/10UGR2
. .the filtering material being held in a closed container [5]
B01D 24/12UGR3
. . .Downward filtration, the filtering material being supported by pervious surfaces (B01D 24/18 takes precedence) [5]
B01D 24/14UGR3
. . .Downward filtration, the container having distribution or collection headers or pervious conduits (B01D 24/18 takes precedence) [5]
B01D 24/16UGR3
. . .Upward filtration (B01D 24/18 takes precedence) [5]
B01D 24/18UGR3
. . .Combined upward and downward filtration [5]
B01D 24/20UGR2
. .the filtering material being provided in an open container [5]
B01D 24/22UGR3
. . .Downward filtration, the filter material being supported by pervious surfaces [5]
B01D 24/24UGR3
. . .Downward filtration, the container having distribution or collection headers or pervious conduits [5]
B01D 24/26UGR3
. . .Upward filtration [5]
B01D 24/28UGR1
.with the filter bed moving during the filtration (with the filter bed fluidised B01D 24/36) [5]
B01D 24/30UGR2
. .Translation [5]
B01D 24/32UGR2
. .Rotation [5]
B01D 24/34UGR1
.with the filtering material and its pervious support moving (tipping buckets, trays or like sections B01D 33/327) [5]
B01D 24/36UGR1
.with the filter bed fluidised during the filtration (with the filter bed being stationary B01D 24/02) [5]
B01D 24/38UGR1
.Feed or discharge devices [5]
B01D 24/40UGR2
. .for feeding [5]
B01D 24/42UGR2
. .for discharging filtrate [5]
B01D 24/44UGR2
. .for discharging filter cake, e.g. chutes [5]
B01D 24/46UGR1
.Regenerating the filtering material in the filter (B01D 24/44 takes precedence) [5]
B01D 24/48UGR1
.integrally combined with devices for controlling the filtration [5]
B01D 25/00HGRFilters formed by clamping together several filtering elements or parts of such elements (disc filters B01D 29/39) [5]
B01D 25/02UGR1
.in which the elements are pre-formed independent filtering units, e.g. modular systems
B01D 25/12UGR1
.Filter presses, i.e. of the plate or plate and frame type
B01D 25/127UGR2
. .with one or more movable filter bands arranged to be clamped between the press plates or between a plate and a frame during filtration, e.g. zigzag endless filter bands (B01D 25/172, B01D 25/176, B01D 25/19 take precedence) [5]
B01D 25/133UGR3
. . .with compression of the filter cake, e.g. by inflatable membranes [5]
B01D 25/164UGR2
. .Chamber-plate presses, i.e. the sides of the filtering elements being clamped between two successive filtering plates (B01D 25/127, B01D 25/172, B01D 25/176, B01D 25/19 take precedence) [5]
B01D 25/168UGR3
. . .with compression of the filter cake, e.g. by inflatable membranes [5]
B01D 25/172UGR2
. .Plate spreading means (removal of filter cakes B01D 25/32) [5]
B01D 25/176UGR2
. .attaching the filter element to the filter press plates, e.g. around the central feed hole in the plates [5]
B01D 25/19UGR2
. .Clamping means for closing the filter press, e.g. hydraulic jacks [5]
B01D 25/21UGR2
. .Plate and frame presses (B01D 25/172, B01D 25/176, B01D 25/19 take precedence) [5]
B01D 25/22UGR1
.Cell-type filters
B01D 25/24UGR2
. .Cell-type roll filters
B01D 25/26UGR2
. .Cell-type stack filters
B01D 25/28UGR1
.Leaching or washing filter cakes in the filter
B01D 25/30UGR1
.Feeding devices
B01D 25/32UGR1
.Removal of filter cakes
B01D 25/34UGR2
. .by moving the filter elements
B01D 25/36UGR3
. . .by centrifugal force
B01D 25/38UGR2
. .by moving parts, e.g. scrapers, contacting stationary filter elements
B01D 27/00HGRCartridge filters of the throw-away type [5]
B01D 27/02UGR1
.with cartridges made from a mass of loose material
B01D 27/04UGR1
.with cartridges made of a piece of unitary material, e.g. filter paper
B01D 27/06UGR2
. .with corrugated, folded or wound material
B01D 27/07UGR3
. . .having a coaxial stream through the filtering element [5]
B01D 27/08UGR1
.Construction of the casing
B01D 27/10UGR1
.Safety devices, e.g. by-passes
B01D 27/14UGR1
.having more than one filtering element [5]
B01D 29/00HGROther filters with filtering elements stationary during filtration, e.g. pressure or suction filters, or filtering elements therefor
B01D 29/01UGR1
.with flat filtering elements (B01D 29/39 takes precedence) [5]
B01D 29/03UGR2
. .self-supporting [5]
B01D 29/05UGR2
. .supported [5]
B01D 29/07UGR3
. . .with corrugated, folded or wound filtering sheets [5]
B01D 29/075UGR2
. .located in a closed housing and comprising scrapers or agitators on the cake side of the filtering elements, e.g. Nutsche- or Rosenmund-type filters for performing multiple step operations such as chemical reactions, filtering and cake treatment [5]
B01D 29/085UGR1
.Funnel filters; Holders therefor [5]
B01D 29/09UGR1
.with filtering bands, e.g. movable between filtering operations [5]
B01D 29/11UGR1
.with bag, cage, hose, tube, sleeve or like filtering elements [5]
B01D 29/13UGR2
. .Supported filter elements [5]
B01D 29/15UGR3
. . .arranged for inward flow filtration [5]
B01D 29/17UGR4
. . . .open-ended [5]
B01D 29/19UGR4
. . . .on solid frames with surface grooves or the like [5]
B01D 29/21UGR4
. . . .with corrugated, folded or wound sheets [5]
B01D 29/23UGR3
. . .arranged for outward flow filtration [5]
B01D 29/25UGR4
. . . .open-ended [5]
B01D 29/27UGR4
. . . .Filter bags [5]
B01D 29/31UGR2
. .Self-supporting filtering elements [5]
B01D 29/33UGR3
. . .arranged for inward flow filtration [5]
B01D 29/35UGR3
. . .arranged for outward flow filtration [5]
B01D 29/37UGR3
. . .open-ended [5]
B01D 29/39UGR1
.with hollow discs side by side on, or around, one or more tubes, e.g. of the leaf type [5]
B01D 29/41UGR2
. .mounted transversely on the tube [5]
B01D 29/43UGR2
. .mounted otherwise than transversely on the tube [5]
B01D 29/44UGR1
.Edge filtering elements, i.e. using contiguous impervious surfaces [4]
B01D 29/46UGR2
. .of flat, stacked bodies [4]
B01D 29/48UGR2
. .of spirally or helically wound bodies [4]
B01D 29/50UGR1
.with multiple filtering elements, characterised by their mutual disposition (B01D 29/39 takes precedence) [5]
B01D 29/52UGR2
. .in parallel connection [5]
B01D 29/54UGR3
. . .arranged concentrically or coaxially [5]
B01D 29/56UGR2
. .in series connection [5]
B01D 29/58UGR3
. . .arranged concentrically or coaxially [5]
B01D 29/60UGR1
.integrally combined with devices for controlling the filtration [5]
B01D 29/62UGR1
.Regenerating the filter material in the filter (devices for taking out of action one or more units of multi-unit filters, e.g. for regeneration, B01D 35/12) [5]
B01D 29/64UGR2
. .by scrapers, brushes or the like, acting on the cake side of the filtering element [5]
B01D 29/66UGR2
. .by flushing, e.g. counter-current air-bumps [5]
B01D 29/68UGR3
. . .with backwash arms, shoes or nozzles [5]
B01D 29/70UGR2
. .by forces created by movement of the filter element [5]
B01D 29/72UGR3
. . .involving vibrations [5]
B01D 29/74UGR3
. . .involving centrifugal force [5]
B01D 29/76UGR1
.Handling the filter cake in the filter for purposes other than for regenerating (B01D 29/94 takes precedence) [5]
B01D 29/78UGR2
. .for washing [5]
B01D 29/80UGR2
. .for drying [5]
B01D 29/82UGR3
. . .by compression [5]
B01D 29/84UGR3
. . .by gases or by heating [5]
B01D 29/86UGR2
. .Retarding cake deposition on the filter during the filtration period, e.g. using stirrers [5]
B01D 29/88UGR1
.having feed or discharge devices [5]
B01D 29/90UGR2
. .for feeding [5]
B01D 29/92UGR2
. .for discharging filtrate [5]
B01D 29/94UGR2
. .for discharging the filter cake, e.g. chutes [5]
B01D 29/96UGR1
.in which the filtering elements are moved between filtering operations; Particular measures for removing or replacing the filtering elements; Transport systems for filters (B01D 29/09, B01D 29/70 take precedence) [5]
B01D 33/00HGRFilters with filtering elements which move during the filtering operation (filters comprising loose filtering material moving or fluidised during filtration B01D 24/28-B01D 24/36; centrifuges B04B) [5]
B01D 33/01UGR1
.with translationally moving filtering elements, e.g. pistons (B01D 33/04-B01D 33/327 take precedence) [5]
B01D 33/03UGR2
. .with vibrating filter elements [5]
B01D 33/04UGR1
.with filtering bands or the like supported on cylinders which are impervious for filtering [5]
B01D 33/044UGR1
.with filtering bands or the like supported on cylinders which are pervious for filtering [5]
B01D 33/048UGR2
. .with endless filtering bands [5]
B01D 33/052UGR3
. . .combined with a compression device (B01D 33/64 takes precedence; presses per se for squeezing out liquid using an endless pressing band B30B 9/24) [5]
B01D 33/056UGR1
.Construction of filtering bands or supporting belts, e.g. devices for centering, mounting or sealing the filtering bands or the supporting belts [5]
B01D 33/06UGR1
.with rotary cylindrical filtering surfaces, e.g. hollow drums (B01D 33/044 takes precedence)
B01D 33/067UGR2
. .Construction of the filtering drums, e.g. mounting or sealing arrangements [5]
B01D 33/073UGR2
. .arranged for inward flow filtration [5]
B01D 33/09UGR3
. . .with surface cells independently connected to pressure distributors [5]
B01D 33/11UGR2
. .arranged for outward flow filtration [5]
B01D 33/13UGR3
. . .with surface cells independently connected to pressure distributors [5]
B01D 33/15UGR1
.with rotary plane filtering surfaces [5]
B01D 33/17UGR2
. .with rotary filtering tables (tables divided into separately tiltable buckets, trays or like sections B01D 33/327) [5]
B01D 33/19UGR3
. . .the table surface being divided in successively tilted sectors or cells, e.g. for discharging the filter cake [5]
B01D 33/21UGR2
. .with hollow filtering discs transversely mounted on a hollow rotary shaft [5]
B01D 33/23UGR3
. . .Construction of discs or component sectors thereof [5]
B01D 33/25UGR2
. .with hollow frames axially mounted on a hollow rotary shaft [5]
B01D 33/27UGR1
.with rotary filtering surfaces, which are neither cylindrical nor planar, e.g. helical surfaces [5]
B01D 33/29UGR1
.the movement of the filter elements being a combination of movements (B01D 33/19 takes precedence) [5]
B01D 33/31UGR2
. .Planetary movement [5]
B01D 33/327UGR2
. .Tipping buckets, trays or like sections [5]
B01D 33/333UGR1
.with individual filtering elements moving along a closed path (tipping buckets, trays or like sections B01D 33/327) [5]
B01D 33/35UGR1
.with multiple filtering elements characterised by their mutual disposition (B01D 33/21 takes precedence) [5]
B01D 33/37UGR2
. .in parallel connection [5]
B01D 33/39UGR3
. . .concentrically or coaxially [5]
B01D 33/41UGR2
. .in series connection [5]
B01D 33/42UGR3
. . .concentrically or coaxially [5]
B01D 33/44UGR1
.Regenerating the filter material in the filter (devices for taking out of action one or more units of multi-unit filters, e.g. for regeneration, B01D 35/12) [5]
B01D 33/46UGR2
. .by scrapers, brushes or the like acting on the cake-side of the filtering element [5]
B01D 33/48UGR2
. .by flushing, e.g. counter-current air-bumps [5]
B01D 33/50UGR3
. . .with backwash arms, shoes or nozzles [5]
B01D 33/52UGR2
. .by forces created by movement of the filter element [5]
B01D 33/54UGR3
. . .involving vibrations [5]
B01D 33/56UGR3
. . .involving centrifugal force [5]
B01D 33/58UGR1
.Handling the filter cake in the filter for purposes other than for regenerating (B01D 33/76 takes precedence) [5]
B01D 33/60UGR2
. .for washing [5]
B01D 33/62UGR2
. .for drying [5]
B01D 33/64UGR3
. . .by compression [5]
B01D 33/66UGR3
. . .by gases or by heating [5]
B01D 33/68UGR2
. .Retarding cake deposition on the filter during the filtration period, e.g. using stirrers [5]
B01D 33/70UGR1
.having feed or discharge devices (B01D 33/82 takes precedence) [5]
B01D 33/72UGR2
. .for feeding [5]
B01D 33/74UGR2
. .for discharging filtrate [5]
B01D 33/76UGR2
. .for discharging the filter cake, e.g. chutes [5]
B01D 33/80UGR1
.Accessories [5]
B01D 33/82UGR2
. .Means for pressure distribution [5]
B01D 35/00HGROther filtering devices; Auxiliary devices for filtration; Filter housing constructions
B01D 35/01UGR1
.Devices for the removal of gas, e.g. air purge systems [5]
B01D 35/02UGR1
.Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks (B01D 35/05 takes precedence)
B01D 35/027UGR2
. .rigidly mounted in or on tanks or reservoirs (B01D 35/04 takes precedence) [5]
B01D 35/04UGR2
. .Plug, tap, or cock filters
B01D 35/05UGR1
.Floating filters [5]
B01D 35/06UGR1
.Filters making use of electricity or magnetism (ultrafiltration, microfiltration B01D 61/14; electrodialysis, electro-osmosis B01D 61/42; devices comprising filters and magnetic separators B03C 1/30) [5]
B01D 35/10UGR1
.Brush filters
B01D 35/12UGR1
.Devices for taking out of action one or more units of multi-unit filters, e.g. for regeneration
B01D 35/14UGR1
.Safety devices specially adapted for filtration (preventing or minimising fires or explosions A62C); Devices for indicating clogging (incorporated in a throw-away filter B01D 27/10)
B01D 35/143UGR2
. .Filter condition indicators [5]
B01D 35/147UGR2
. .Bypass or safety valves [5]
B01D 35/15UGR2
. .Bidirectional working filters [5]
B01D 35/153UGR2
. .Anti-leakage or anti-return valves [5]
B01D 35/157UGR2
. .Flow control valves; Damping or calibrated passages [5]
B01D 35/16UGR1
.Cleaning-out devices
B01D 35/18UGR1
.Heating or cooling the filters
B01D 35/20UGR1
.Vibrating the filters (regenerating filter material by vibrations in filters with stationary filtering elements B01D 29/72; discharging the filter cake by vibrations in filters with moving filtering elements B01D 33/54, B01D 33/76) [5]
B01D 35/22UGR1
.Directing the mixture to be filtered on to the filters in a manner to clean the filters
B01D 35/24UGR1
.Providing loose granular material to scratch the filters clean
B01D 35/26UGR1
.Filters with built-in pumps
B01D 35/28UGR1
.Strainers not provided for elsewhere
B01D 35/30UGR1
.Filter housing constructions [4]
B01D 35/31UGR2
. .including arrangements for environmental protection, e.g. pressure resisting features [5]
B01D 35/32UGR3
. . .against radiation [5]
B01D 35/34UGR2
. .open-topped (B01D 35/31 takes precedence) [5]
B01D 36/00HGRFilter circuits or combinations of filters with other separating devices (devices for the removal of gas, e.g. air purge systems, B01D 35/01) [4, 5]
B01D 36/02UGR1
.Combinations of filters of different kinds (B01D 29/50, B01D 33/35 take precedence) [4, 5]
B01D 36/04UGR1
.Combinations of filters with settling tanks [4]
B01D 37/00HGRProcesses of filtration (processes specially adapted for filtering gases B01D 46/00)
B01D 37/02UGR1
.Precoating the filtering elements or material; Addition of filter aids to the liquid being filtered
B01D 37/03UGR1
.using flocculating agents [5]
B01D 37/04UGR1
.Controlling the filtration
B01D 39/00HGRFiltering material for liquid or gaseous fluids
B01D 39/02UGR1
.Loose filtering material, e.g. loose fibres
B01D 39/04UGR2
. .Organic material, e.g. cellulose, cotton
B01D 39/06UGR2
. .Inorganic material, e.g. asbestos fibres, glass beads or fibres
B01D 39/08UGR1
.Filter cloth, i.e. woven, knitted or interlaced material (metallic B01D 39/10)
B01D 39/10UGR1
.Filter screens essentially made of metal
B01D 39/12UGR2
. .of wire gauze; of knitted wire; of expanded metal
B01D 39/14UGR1
.Other self-supporting filtering material
B01D 39/16UGR2
. .of organic material, e.g. synthetic fibres
B01D 39/18UGR3
. . .the material being cellulose or derivatives thereof (making filter paper D21F 11/14)
B01D 39/20UGR2
. .of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires (porous ceramic material C04B; sintering metals C22C 1/04)
B01D 41/00HGRRegeneration of the filtering material or filter elements outside the filter for liquid or gaseous fluids
B01D 41/02UGR1
.of loose filtering material
B01D 41/04UGR1
.of rigid self-supporting filtering material
B01D 43/00ZWE
B01D 43/00HGRSeparating particles from liquids, or liquids from solids, otherwise than by sedimentation or filtration (flotation processes B03D 1/00; drying solid materials or objects F26B)
B01D 45/00ZWSeparating dispersed particles from gases or vapours (suction cleaner filters A47L 9/10; filters for breathing-protection purposes A62B 23/00; filtering air for vehicles B60H 3/06; separating pneumatically-conveyed materials from propelling gas B65G 53/60; exhaust or silencing apparatus for machines or engines having means for removing solid constituents of exhaust F01N 3/02; air cleaners for the intakes of gas-turbine or jet-propulsion plants F02C 7/05, of combustion engines F02M 35/024, of compressors F04B 39/16; filtering in air-conditioning F24F 3/16)
B01D 45/00HGRSeparating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
B01D 45/02UGR1
.by utilising gravity
B01D 45/04UGR1
.by utilising inertia (B01D 45/12 takes precedence)
B01D 45/06UGR2
. .by reversal of direction of flow
B01D 45/08UGR2
. .by impingement against baffle separators
B01D 45/10UGR3
. . .which are wetted
B01D 45/12UGR1
.by centrifugal forces (centrifuges B04B; cyclones B04C)
B01D 45/14UGR2
. .generated by rotating vanes, discs, drums or brushes
B01D 45/16UGR2
. .generated by the winding course of the gas stream
B01D 45/18UGR1
.Cleaning-out devices
B01D 46/00HGRFilters or filtering processes specially modified for separating dispersed particles from gases or vapours (filtering elements B01D 24/00-B01D 35/00; filtering material B01D 39/00; their regeneration outside the filters B01D 41/00)
B01D 46/02UGR1
.Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
B01D 46/04UGR2
. .Cleaning filters
B01D 46/06UGR2
. .with means keeping the working surfaces flat
B01D 46/08UGR3
. . .the working surfaces forming a star shape
B01D 46/10UGR1
.Particle separators, e.g. dust precipitators, using filter plates, sheets, or pads having plane surfaces
B01D 46/12UGR2
. .in multiple arrangements
B01D 46/14UGR2
. .arranged in a star shape
B01D 46/16UGR2
. .arranged on non-filtering conveyers
B01D 46/18UGR1
.Particle separators, e.g. dust precipitators, using filtering belts
B01D 46/20UGR2
. .the belts combined with drums
B01D 46/22UGR2
. .the belts travelling during filtering
B01D 46/24UGR1
.Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
B01D 46/26UGR2
. .rotatable
B01D 46/28UGR1
.Particle separators, e.g. dust precipitators, using filter brushes
B01D 46/30UGR1
.Particle separators, e.g. dust precipitators, using loose filtering material
B01D 46/32UGR2
. .the material moving during filtering
B01D 46/34UGR3
. . .not horizontally, e.g. using shoots
B01D 46/36UGR3
. . .as a substantially horizontal layer, e.g. on rotary tables, drums, conveyer belts
B01D 46/38UGR3
. . .as fluidised bed
B01D 46/40UGR1
.Particle separators, e.g. dust precipitators, using edge filters, i.e. using contiguous impervious surfaces
B01D 46/42UGR1
.Auxiliary equipment or operation thereof
B01D 46/44UGR2
. .controlling filtration
B01D 46/46UGR3
. . .automatic
B01D 46/48UGR2
. .Removing dust other than cleaning filters
B01D 46/50UGR2
. .Means for discharging electrostatic potential
B01D 46/52UGR1
.Particle separators, e.g. dust precipitators, using filters embodying folded material
B01D 46/54UGR1
.Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms
B01D 47/00HGRSeparating dispersed particles from gases, air or vapours by liquid as separating agent (B01D 45/10 takes precedence; fractionating columns or parts thereof B01D 3/16)
B01D 47/02UGR1
.by passing the gas or air or vapour over or through a liquid bath
B01D 47/04UGR1
.by passing the gas or air or vapour through foam
B01D 47/05UGR1
.by condensation of the separating agent [3]
B01D 47/06UGR1
.Spray cleaning
B01D 47/08UGR2
. .with rotary nozzles
B01D 47/10UGR1
.Venturi scrubbers
B01D 47/12UGR1
.Washers with plural different washing sections (B01D 47/14 takes precedence) [3]
B01D 47/14UGR1
.Packed scrubbers (packing elements B01J 19/30, B01J 19/32) [3]
B01D 47/16UGR1
.Apparatus having rotary means, other than rotatable nozzles, for atomising the cleaning liquid
B01D 47/18UGR2
. .with horizontally-arranged shafts
B01D 49/00HGRSeparating dispersed particles from gases, air or vapours by other methods
B01D 49/02UGR1
.by thermal repulsion
B01D 50/00HGRCombinations of devices for separating particles from gases or vapours
B01D 51/00HGRAuxiliary pretreatment of gases or vapours to be cleaned (preventing dust fires A62C; pretreatment specially adapted for magnetic or electrostatic separation B03C) [6]
B01D 51/02UGR1
.Amassing the particles, e.g. by flocculation
B01D 51/04UGR2
. .by seeding, e.g. by adding particles
B01D 51/06UGR2
. .by varying the pressure of the gas or vapour
B01D 51/08UGR3
. . .by sound or ultrasonics
B01D 51/10UGR1
.Conditioning the gas to be cleaned
B01D 53/00ZWE
B01D 53/00HGRSeparation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols (recovery of volatile solvents by condensation B01D 5/00; sublimation B01D 7/00; cold traps, cold baffles B01D 8/00; for the separation of specific gases or vapours, see the relevant places, e.g. for purification or separation of nitrogen C01B 21/04; working-up undefined gaseous mixtures obtained by cracking hydrocarbon oils C10G 70/00; cleaning coal gas C10K; working-up of natural gas, or synthetic natural gas, C10L 3/10; separation of difficult-to-condense gases or air by liquefaction F25J; for investigating materials G01N 30/00) [3, 5]
B01D 53/02UGR1
.by adsorption, e.g. preparative gas chromatography
B01D 53/04UGR2
. .with stationary adsorbents
B01D 53/047UGR3
. . .Pressure swing adsorption [6]
B01D 53/053UGR4
. . . .with storage or buffer vessel [6]
B01D 53/06UGR2
. .with moving adsorbents
B01D 53/08UGR3
. . .according to the "moving bed" method
B01D 53/10UGR3
. . .with dispersed adsorbents
B01D 53/12UGR4
. . . .according to the "fluidised technique"
B01D 53/14UGR1
.by absorption
B01D 53/18UGR2
. .Absorbing units; Liquid distributors therefor (B01D 3/16, B01D 3/26, B01D 3/30 take precedence; packing elements B01J 19/30, B01J 19/32)
B01D 53/22UGR1
.by diffusion (manufacturing semi-permeable membranes B01D 67/00; form, structure or properties of semi-permeable membranes B01D 69/00; material for semi-permeable membranes B01D 71/00)
B01D 53/24UGR1
.by centrifugal force (centrifuges B04B; cyclones B04C)
B01D 53/26UGR1
.Drying gases or vapours
B01D 53/28UGR2
. .Selection of materials for use as drying agents
B01D 53/30UGR1
.Controlling by gas-analysis apparatus
B01D 53/32UGR1
.by electrical effects other than those provided for in group B01D 61/00 [5]
B01D 53/34UGR1
.Chemical or biological purification of waste gases [3, 6]
B01D 53/38UGR2
. .Removing components of undefined structure [6]
B01D 53/40UGR3
. . .Acidic components (B01D 53/44 takes precedence) [6]
B01D 53/42UGR3
. . .Basic components (B01D 53/44 takes precedence) [6]
B01D 53/44UGR3
. . .Organic components [6]
B01D 53/46UGR2
. .Removing components of defined structure [6]
B01D 53/48UGR3
. . .Sulfur compounds [6]
B01D 53/50UGR4
. . . .Sulfur oxides (B01D 53/60 takes precedence) [6]
B01D 53/52UGR4
. . . .Hydrogen sulfide [6]
B01D 53/54UGR3
. . .Nitrogen compounds [6]
B01D 53/56UGR4
. . . .Nitrogen oxides (B01D 53/60 takes precedence) [6]
B01D 53/58UGR4
. . . .Ammonia [6]
B01D 53/60UGR3
. . .Simultaneously removing sulfur oxides and nitrogen oxides [6]
B01D 53/62UGR3
. . .Carbon oxides [6]
B01D 53/64UGR3
. . .Heavy metals or compounds thereof, e.g. mercury [6]
B01D 53/66UGR3
. . .Ozone [6]
B01D 53/68UGR3
. . .Halogens or halogen compounds [6]
B01D 53/70UGR4
. . . .Organic halogen compounds [6]
B01D 53/72UGR3
. . .Organic compounds not provided for in groups B01D 53/48-B01D 53/70, e.g. hydrocarbons [6]
B01D 53/73UGR2
. .After-treatment of removed components [6]
B01D 53/74UGR2
. .General processes for purification of waste gases; Apparatus or devices specially adapted therefor (B01D 53/92 takes precedence) [6]
B01D 53/75UGR3
. . .Multi-step processes [6]
B01D 53/76UGR3
. . .Gas phase processes, e.g. by using aerosols [6]
B01D 53/77UGR3
. . .Liquid phase processes [6]
B01D 53/78UGR4
. . . .with gas-liquid contact [6]
B01D 53/79UGR4
. . . .Injecting reactants [6]
B01D 53/80UGR3
. . .Semi-solid phase processes, i.e. by using slurries [6]
B01D 53/81UGR3
. . .Solid phase processes [6]
B01D 53/82UGR4
. . . .with stationary reactants [6]
B01D 53/83UGR4
. . . .with moving reactants [6]
B01D 53/84UGR3
. . .Biological processes [6]
B01D 53/85UGR4
. . . .with gas-solid contact [6]
B01D 53/86UGR3
. . .Catalytic processes [6]
B01D 53/88UGR4
. . . .Handling or mounting catalysts [6]
B01D 53/90UGR4
. . . .Injecting reactants [6]
B01D 53/92UGR2
. .of engine exhaust gases (exhaust apparatus having means for purifying or otherwise treating exhaust gases F01N 3/00) [6]
B01D 53/94UGR3
. . .by catalytic processes [6]
B01D 53/96UGR2
. .Regeneration, reactivation or recycling of reactants [6]
B01D 57/00HGRSeparation, other than separation of solids, not fully covered by a single other group or subclass, e.g. B03C
B01D 57/02UGR1
.by electrophoresis (treatment of water, waste water, sewage or sludge by electrophoresis C02F 1/469; electrophoretic production of compounds or non-metals C25B 7/00; investigating or analysing materials by using electrophoresis G01N 27/26) [3, 5]
B01D 59/00HGRSeparation of different isotopes of the same chemical element (preventing occurrence of critical conditions when producing fissile material G21; shielding from radioactivity G21F)
B01D 59/02UGR1
.Separation by phase transition
B01D 59/04UGR2
. .by distillation
B01D 59/06UGR2
. .by fractional melting; by zone melting
B01D 59/08UGR2
. .by fractional crystallisation, by precipitation, by zone freezing
B01D 59/10UGR1
.Separation by diffusion
B01D 59/12UGR2
. .by diffusion through barriers
B01D 59/14UGR3
. . .Construction of the barrier
B01D 59/16UGR2
. .by thermal diffusion
B01D 59/18UGR2
. .by separation jets
B01D 59/20UGR1
.Separation by centrifuging
B01D 59/22UGR1
.Separation by extracting
B01D 59/24UGR2
. .by solvent extraction
B01D 59/26UGR2
. .by sorption, i.e. absorption, adsorption, persorption
B01D 59/28UGR1
.Separation by chemical exchange
B01D 59/30UGR2
. .by ion exchange
B01D 59/32UGR2
. .by exchange between fluids
B01D 59/33UGR3
. . .involving dual temperature exchange [2]
B01D 59/34UGR1
.Separation by photochemical methods
B01D 59/36UGR1
.Separation by biological methods
B01D 59/38UGR1
.Separation by electrochemical methods (in general B01J)
B01D 59/40UGR2
. .by electrolysis
B01D 59/42UGR2
. .by electromigration; by electrophoresis
B01D 59/44UGR1
.Separation by mass spectrography (particle spectrometers or separator tubes H01J 49/00)
B01D 59/46UGR2
. .using only electrostatic fields
B01D 59/48UGR2
. .using electrostatic and magnetic fields
B01D 59/50UGR1
.Separation involving two or more processes covered by different groups selected from groups B01D 59/02, B01D 59/10, B01D 59/20, B01D 59/22, B01D 59/28, B01D 59/34, B01D 59/36, B01D 59/38, B01D 59/44
B01D 61/00ZWProcesses of separation using semi-permeable membranes, e.g. dialysis, osmosis, ultrafiltration; Apparatus specially adapted therefor; Semi-permeable membranes or their production (separation of gases or vapours by diffusion B01D 53/22; treatment of milk by dialysis, reverse osmosis or ultrafiltration A23C 9/142, by electrodialysis A23C 9/144; artificial kidneys A61M 1/14; treatment of water by dialysis, osmosis or reverse osmosis C02F 1/44, by electrodialysis C02F 1/469; apparatus for enzymology or microbiology with dialysis means C12M 1/12; production or purification of sugar juices, e.g. by osmosis, C13D 3/16; extraction of sugar from molasses, e.g. by osmosis, C13J 1/08; diaphragms for electrolysis C25B 13/00, C25C 7/04; osmosis as energy source F03G 7/00) [5]
B01D 61/00HGRProcesses of separation using semi-permeable membranes, e.g. dialysis, osmosis, ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor [5]
B01D 61/02UGR1
.Reverse osmosis; Hyperfiltration [5]
B01D 61/04UGR2
. .Feed pretreatment [5]
B01D 61/06UGR2
. .Energy recovery [5]
B01D 61/08UGR2
. .Apparatus therefor [5]
B01D 61/10UGR2
. .Accessories; Auxiliary operations [5]
B01D 61/12UGR2
. .Controlling or regulating [5]
B01D 61/14UGR1
.Ultrafiltration; Microfiltration [5]
B01D 61/16UGR2
. .Feed pretreatment [5]
B01D 61/18UGR2
. .Apparatus therefor [5]
B01D 61/20UGR2
. .Accessories; Auxiliary operations [5]
B01D 61/22UGR2
. .Controlling or regulating [5]
B01D 61/24UGR1
.Dialysis [5]
B01D 61/26UGR2
. .Dialysate solution flow, e.g. preparation, regeneration [5]
B01D 61/28UGR2
. .Apparatus therefor [5]
B01D 61/30UGR2
. .Accessories; Auxiliary operation [5]
B01D 61/32UGR2
. .Controlling or regulating [5]
B01D 61/34UGR3
. . .Measuring ultrafiltrate during dialysis [5]
B01D 61/36UGR1
.Pervaporation; Membrane distillation; Liquid permeation [5]
B01D 61/38UGR1
.Liquid-membrane separation [5]
B01D 61/40UGR2
. .using emulsion-type membranes [5]
B01D 61/42UGR1
.Electrodialysis; Electro-osmosis [5]
B01D 61/44UGR2
. .Ion-selective electrodialysis [5]
B01D 61/46UGR3
. . .Apparatus therefor [5]
B01D 61/48UGR4
. . . .having one or more compartments filled with ion-exchange material [5]
B01D 61/50UGR4
. . . .Stacks of the plate-and-frame type [5]
B01D 61/52UGR3
. . .Accessories; Auxiliary operation [5]
B01D 61/54UGR3
. . .Controlling or regulating [5]
B01D 61/56UGR2
. .Electro-osmotic dewatering [5]
B01D 61/58UGR1
.Multistep processes [5]
B01D 63/00HGRApparatus in general for separation processes using semi-permeable membranes [5]
B01D 63/02UGR1
.Hollow fibre modules [5]
B01D 63/04UGR2
. .comprising multiple hollow fibre assemblies [5]
B01D 63/06UGR1
.Tubular membrane modules [5]
B01D 63/08UGR1
.Flat membrane modules [5]
B01D 63/10UGR1
.Spiral-wound membrane modules [5]
B01D 63/12UGR2
. .comprising multiple spiral-wound assemblies [5]
B01D 63/14UGR1
.Pleat-type membrane modules [5]
B01D 63/16UGR1
.Rotary, reciprocated or vibrated modules [5]
B01D 65/00HGRAccessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes [5]
B01D 65/02UGR1
.Membrane cleaning or sterilisation [5]
B01D 65/04UGR2
. .with movable bodies, e.g. foam balls [5]
B01D 65/06UGR2
. .with special washing compositions [5]
B01D 65/08UGR1
.Prevention of membrane fouling or of concentration polarisation [5]
B01D 65/10UGR1
.Testing of membranes or membrane apparatus; Detecting or repairing leaks [5]
B01D 67/00HGRProcesses specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus [5]
B01D 69/00HGRSemi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor [5]
B01D 69/02UGR1
.characterised by their properties [5]
B01D 69/04UGR1
.Tubular membranes [5]
B01D 69/06UGR1
.Flat membranes [5]
B01D 69/08UGR1
.Hollow fibre membranes (manufacture of hollow fibres D01D 5/24, D01F 1/08) [5]
B01D 69/10UGR1
.Supported membranes; Membrane supports [5]
B01D 69/12UGR1
.Composite membranes; Ultra-thin membranes [5]
B01D 69/14UGR1
.Dynamic membranes [5]
B01D 71/00HGRSemi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor [5]
B01D 71/02UGR1
.Inorganic material [5]
B01D 71/04UGR2
. .Glass [5]
B01D 71/06UGR1
.Organic material [5]
B01D 71/08UGR2
. .Polysaccharides [5]
B01D 71/10UGR3
. . .Cellulose; Modified cellulose [5]
B01D 71/12UGR3
. . .Cellulose derivatives [5]
B01D 71/14UGR4
. . . .Esters of organic acids [5]
B01D 71/16UGR5
. . . . .Cellulose acetate [5]
B01D 71/18UGR5
. . . . .Mixed esters, e.g. cellulose acetate-butyrate [5]
B01D 71/20UGR4
. . . .Esters of inorganic acids, e.g. cellulose nitrate [5]
B01D 71/22UGR4
. . . .Cellulose ethers [5]
B01D 71/24UGR2
. .Rubbers [5]
B01D 71/26UGR2
. .Polyalkenes [5]
B01D 71/28UGR2
. .Polymers of vinyl aromatic compounds [5]
B01D 71/30UGR2
. .Polyalkenyl halides [5]
B01D 71/32UGR3
. . .containing fluorine atoms [5]
B01D 71/34UGR4
. . . .Polyvinylidene fluoride [5]
B01D 71/36UGR4
. . . .Polytetrafluoroethene [5]
B01D 71/38UGR2
. .Polyalkenylalcohols; Polyalkenylesters; Polyalkenylethers; Polyalkenylaldehydes; Polyalkenylketones; Polyalkenylacetals; Polyalkenylketals [5]
B01D 71/40UGR2
. .Polymers of unsaturated acids or derivatives thereof, e.g. salts, amides, imides, nitriles, anhydrides, esters [5]
B01D 71/42UGR3
. . .Polymers of nitriles, e.g. polyacrylonitrile [5]
B01D 71/44UGR2
. .Polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds, not provided for in a single one of groups B01D 71/26-B01D 71/42 [5]
B01D 71/46UGR2
. .Epoxy resins [5]
B01D 71/48UGR2
. .Polyesters [5]
B01D 71/50UGR2
. .Polycarbonates [5]
B01D 71/52UGR2
. .Polyethers [5]
B01D 71/54UGR2
. .Polyureas; Polyurethanes [5]
B01D 71/56UGR2
. .Polyamides, e.g. polyester-amides [5]
B01D 71/58UGR2
. .Other polymers having nitrogen in the main chain, with or without oxygen or carbon only [5]
B01D 71/60UGR3
. . .Polyamines [5]
B01D 71/62UGR3
. . .Polycondensates having nitrogen-containing heterocyclic rings in the main chain [5]
B01D 71/64UGR4
. . . .Polyimides; Polyamide-imides; Polyester-imides; Polyamide acids or similar polyimide precursors [5]
B01D 71/66UGR2
. .Polymers having sulfur in the main chain, with or without nitrogen, oxygen or carbon only [5]
B01D 71/68UGR3
. . .Polysulfones; Polyethersulfones [5]
B01D 71/70UGR2
. .Polymers having silicon in the main chain, with or without sulfur, nitrogen, oxygen or carbon only [5]
B01D 71/72UGR2
. .Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, not provided for in a single one of groups B01D 71/46-B01D 71/70 [5]
B01D 71/74UGR2
. .Natural macromolecular material or derivatives thereof (B01D 71/08, B01D 71/24 take precedence) [5]
B01D 71/76UGR2
. .Macromolecular material not specifically provided for in a single one of groups B01D 71/08-B01D 71/74 (rubbers in general B01D 71/24) [5]
B01D 71/78UGR3
. . .Graft polymers [5]
B01D 71/80UGR3
. . .Block polymers [5]
B01D 71/82UGR3
. . .characterised by the presence of specified groups, e.g. introduced by chemical after-treatment [5]