IPC 6 English version B01D 25/00-B01D 33/82

IPC ⁶ English version

B01D - B01D 24/48

B01D02500-B01D03382

B01D 35/00 - B01D 46/54

SECTION B– PERFORMING OPERATIONS; TRANSPORTING

B 01

PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL (furnaces, kilns, ovens, retorts, in general F 27)

B 01 D

SEPARATION (separating solids from solids by wet methods B 03 B, B 03 D, by pneumatic jigs or tables B 03 B, by other dry methods B 07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B 03 C; centrifuges, vortex apparatus B 04; presses per se for squeezing-out liquid from liquid-containing material B 30 B 9/02; treatment of water C 02 F, e.g. softening by ion-exchange C 02 F 1/42; arrangement or mounting of filters in air-conditioning, air-humidification or ventilation F 24 F 13/28) [5]

25/

Filters formed by clamping together several filtering elements or parts of such elements (disc filters B 01 D 29/39) [5]

25/

in which the elements are pre-formed independent filtering units, e.g. modular systems

25/

Filter presses, i.e. of the plate or plate and frame type

25/

127

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 (B 01 D 25/172, B 01 D 25/176, B 01 D 25/19 take precedence) [5]

25/

133

with compression of the filter cake, e.g. by inflatable membranes [5]

25/

164

Chamber-plate presses, i.e. the sides of the filtering elements being clamped between two successive filtering plates (B 01 D 25/127, B 01 D 25/172, B 01 D 25/176, B 01 D 25/19 take precedence) [5]

25/

168

with compression of the filter cake, e.g. by inflatable membranes [5]

25/

172

Plate spreading means (removal of filter cakes B 01 D 25/32) [5]

25/

176

attaching the filter element to the filter press plates, e.g. around the central feed hole in the plates [5]

25/

Clamping means for closing the filter press, e.g. hydraulic jacks [5]

25/

Plate and frame presses (B 01 D 25/172, B 01 D 25/176, B 01 D 25/19 take precedence) [5]

25/

Cell-type filters

25/

Cell-type roll filters

25/

Cell-type stack filters

25/

Leaching or washing filter cakes in the filter

25/

Feeding devices

25/

Removal of filter cakes

25/

by moving the filter elements

25/

by centrifugal force

25/

by moving parts, e.g. scrapers, contacting stationary filter elements

27/

Cartridge filters of the throw-away type [5]

27/

with cartridges made from a mass of loose material

27/

with cartridges made of a piece of unitary material, e.g. filter paper

27/

with corrugated, folded or wound material

27/

having a coaxial stream through the filtering element [5]

27/

Construction of the casing

27/

Safety devices, e.g. by-passes

27/

having more than one filtering element [5]

29/

Other filters with filtering elements stationary during filtration, e.g. pressure or suction filters, or filtering elements therefor

29/

with flat filtering elements (B 01 D 29/39 takes precedence) [5]

29/

self-supporting [5]

29/

supported [5]

29/

with corrugated, folded or wound filtering sheets [5]

Note

If the subject matter classified in group B 01 D 29/075 or B 01 D 29/085 also contains relevant information covered by other subgroups of group B 01 D 29/00, it is also classified in the other appropriate subgroups of group B 01 D 29/00. [5]

29/

075

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]

29/

085

Funnel filters; Holders therefor [5]

29/

with filtering bands, e.g. movable between filtering operations [5]

29/

with bag, cage, hose, tube, sleeve or like filtering elements [5]

29/

Supported filter elements [5]

29/

arranged for inward flow filtration [5]

29/

open-ended [5]

29/

on solid frames with surface grooves or the like [5]

29/

with corrugated, folded or wound sheets [5]

29/

arranged for outward flow filtration [5]

29/

open-ended [5]

29/

Filter bags [5]

29/

Self-supporting filtering elements [5]

29/

arranged for inward flow filtration [5]

29/

arranged for outward flow filtration [5]

29/

open-ended [5]

29/

with hollow discs side by side on, or around, one or more tubes, e.g. of the leaf type [5]

29/

mounted transversely on the tube [5]

29/

mounted otherwise than transversely on the tube [5]

29/

Edge filtering elements, i.e. using contiguous impervious surfaces [4]

29/

of flat, stacked bodies [4]

29/

of spirally or helically wound bodies [4]

29/

with multiple filtering elements, characterised by their mutual disposition (B 01 D 29/39 takes precedence) [5]

29/

in parallel connexion [5]

29/

arranged concentrically or coaxially [5]

29/

in series connexion [5]

29/

arranged concentrically or coaxially [5]

29/

integrally combined with devices for controlling the filtration [5]

29/

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, B 01 D 35/12) [5]

29/

by scrapers, brushes or the like, acting on the cake side of the filtering element [5]

29/

by flushing, e.g. counter-current air-bumps [5]

29/

with backwash arms, shoes or nozzles [5]

29/

by forces created by movement of the filter element [5]

29/

involving vibrations [5]

29/

involving centrifugal force [5]

29/

Handling the filter cake in the filter for purposes other than for regenerating (B 01 D 29/94 takes precedence) [5]

29/

for washing [5]

29/

for drying [5]

29/

by compression [5]

29/

by gases or by heating [5]

29/

Retarding cake deposition on the filter during the filtration period, e.g. using stirrers [5]

29/

having feed or discharge devices [5]

29/

for feeding [5]

29/

for discharging filtrate [5]

29/

for discharging the filter cake, e.g. chutes [5]

29/

in which the filtering elements are moved between filtering operations; Particular measures for removing or replacing the filtering elements; Transport systems for filters (B 01 D 29/09, B 01 D 29/70 take precedence) [5]

33/

Filters with filtering elements which move during the filtering operation (filters comprising loose filtering material moving or fluidised during filtration B 01 D 24/28 to B 01 D 24/36; centrifuges B 04 B) [5]

33/

with translationally moving filtering elements, e.g. pistons (B 01 D 33/04 to B 01 D 33/327 take precedence) [5]

33/

with vibrating filter elements [5]

33/

with filtering bands or the like supported on cylinders which are impervious for filtering [5]

33/

044

with filtering bands or the like supported on cylinders which are pervious for filtering [5]

33/

048

with endless filtering bands [5]

33/

052

combined with a compression device (B 01 D 33/64 takes precedence; presses per se for squeezing out liquid using an endless pressing band B 30 B 9/24) [5]

33/

056

Construction of filtering bands or supporting belts, e.g. devices for centering, mounting or sealing the filtering bands or the supporting belts [5]

33/

with rotary cylindrical filtering surfaces, e.g. hollow drums (B 01 D 33/044 takes precedence)

33/

067

Construction of the filtering drums, e.g. mounting or sealing arrangements [5]

33/

073

arranged for inward flow filtration [5]

33/

with surface cells independently connected to pressure distributors [5]

33/

arranged for outward flow filtration [5]

33/

with surface cells independently connected to pressure distributors [5]

33/

with rotary plane filtering surfaces [5]

33/

with rotary filtering tables (tables divided into separately tiltable buckets, trays or like sections B 01 D 33/327) [5]

33/

the table surface being divided in successively tilted sectors or cells, e.g. for discharging the filter cake [5]

33/

with hollow filtering discs transversely mounted on a hollow rotary shaft [5]

33/

Construction of discs or component sectors thereof [5]

33/

with hollow frames axially mounted on a hollow rotary shaft [5]

33/

with rotary filtering surfaces, which are neither cylindrical nor planar, e.g. helical surfaces [5]

33/

the movement of the filter elements being a combination of movements (B 01 D 33/19 takes precedence) [5]

33/

Planetary movement [5]

33/

327

Tipping buckets, trays or like sections [5]

33/

333

with individual filtering elements moving along a closed path (tipping buckets, trays or like sections B 01 D 33/327) [5]

33/

with multiple filtering elements characterised by their mutual disposition (B 01 D 33/21 takes precedence) [5]

33/

in parallel connexion [5]

33/

concentrically or coaxially [5]

33/

in series connexion [5]

33/

concentrically or coaxially [5]

33/

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, B 01 D 35/12) [5]

33/

by scrapers, brushes or the like acting on the cake-side of the filtering element [5]

33/

by flushing, e.g. counter-current air-bumps [5]

33/

with backwash arms, shoes or nozzles [5]

33/

by forces created by movement of the filter element [5]

33/

involving vibrations [5]

33/

involving centrifugal force [5]

33/

Handling the filter cake in the filter for purposes other than for regenerating (B 01 D 33/76 takes precedence) [5]

33/

for washing [5]

33/

for drying [5]

33/

by compression [5]

33/

by gases or by heating [5]

33/

Retarding cake deposition on the filter during the filtration period, e.g. using stirrers [5]

33/

having feed or discharge devices (B 01 D 33/82 takes precedence) [5]

33/

for feeding [5]

33/

for discharging filtrate [5]

33/

for discharging the filter cake, e.g. chutes [5]

33/

Accessories [5]

33/

Means for pressure distribution [5]

B01D - B01D 24/48

B01D 35/00 - B01D 46/54