IPC Definitions - January 01, 2012

B01D - Definition fr

Definition statement

This subclass covers:

Processes and apparatus for evaporation, distillation, sublimation, crystallisation, solvent extraction, chromatography, sedimentation, filtration, dust precipitation, gas cleaning, absorption, adsorption, separation of isotopes.

Cold traps, cold baffles.

Treating liquids by displacement, adsorption, separation or degasification.

Treating gases or vapours by separation, recovering, chemical or biological purification of waste gases.

Separation using semi-permeable membranes, dialysis, osmosis, ultrafiltration.

Separation of suspended particles from liquids by sedimentation, flocculation, settling, filtration or other processes.

Separation of dispersed particles from gases or vapours, by filtration, gravity, inertia or centrifugal forces, or using liquid as separating agent.

Similar processes which are not concerned with, or limited to, separation.

Relationship between large subject matter areas

For apparatus used in drying or evaporation, F26B takes precedence over this subclass.

Separation of isotopes of the same chemical element is covered by group B01D 59/00, whatever process or apparatus is employed; this group therefore takes precedence over other subclasses of class B01.

References relevant to classification in this subclass

This subclass does not cover:

Separating solids from solids by wet methods

B03B, B03D

Separating solids from solids using liquids or using pneumatic jigs or tables

B03B

Magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields

B03C

Flotation, differential sedimentation

B03D

Separating solids from solids by dry methods, e.g. sieving, screening, sifting or using gas currents

B07B

Centrifuges

B04B

Vortex apparatus, e.g. cyclones

B04C

Presses per se for squeezing-out liquid from liquid-containing material

B30B 9/02

Making single crystals

C30B

Into single crystals

C30B 23/00

Manufacture of hollow fibres

D01D 5/24, D01F 1/08

Separation of difficult-to-condense gases or air by liquefaction

F25J 3/00

Condensers

F28B
Examples of places where the subject matter of this class is covered when specially adapted, used for a particular purpose, or incorporated in a larger system:

Blood or infusion liquid filters

A61M 5/165

Screens or sieves per se

B07B 1/00

Extrusion filters

B29C 47/68

Filtering spinning solution or melt

D01D 1/10

Filtration of lubricants

F16N 39/06

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

Air cleaners for the intakes of combustion engines

F02M 35/024

Air cleaners for the intakes of compressors

F04B 39/16

Filtering in air-conditioning

F24F 3/16

Arrangement or mounting of filters in air-conditioning, air-humidification or ventilation

F24F 13/28

Purification or separation of nitrogen

C01B 21/04

Working-up unidentified 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

Investigating materials

G01N 30/00

Treatment of milk by dialysis, reverse osmosis or ultrafiltration

A23C 9/142

Treatment of milk by electrodialysis

A23C 9/144

Artificial kidneys

A61M 1/14

Treatment of water e.g. softening of water by ion-exchange

C02F, C02F 1/42

Treatment of water by dialysis, osmosis or reverse osmosis

C02F 1/44

Treatment of water 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

C13B 20/16

Extraction of sugar from molasses, e.g. by osmosis

C13B 35/08

Diaphragms for electrolysis

C25B 13/00, C25C 7/04

Osmosis as energy source

F03G 7/00

Special rules of classification

Group B01D 59/00 (separation of isotopes) takes precedence over other groups of this subclass since it covers separation of isotopes of the same chemical element, whatever process or apparatus is employed.

Glossary of terms

In this subclass, the following terms or expressions are used with the meaning indicated:

Filtration

The separation of a fluid-solid mixture, involving passage of most of the fluid through a porous barrier which retains most of the solid particulates contained in the mixture; includes straining solids from fluids.

Filter medium

A porous barrier or porous arrangement of material, which lets a fluid pass while retaining most of the solids which were mixed with it.

Filtering element

A section of filter medium in addition to parts to which the medium is demountably or permanently fixed, including other sections of medium, end caps, peripheral frames or edge strips, but excluding housings.

Filter housing

The fluid-constraining impervious vessel, whether open or closed, which contains, or is adapted to contain one or more filtering elements or filter media.

Filter chamber

The space within a housing where filtering elements or filter media are located; partitions may divide a single housing into a plurality of chambers.

Filtering apparatus

Filtering elements combined with housings, cleaning arrangements, motor or like parts, which are characteristic of the particular type of apparatus. Ancillary devices such as pumps or valves are considered part of a filtering apparatus when inside the apparatus. Ancillary devices performing similar or different unit operations such as comminutors, mixers or non-filtering separators, whether or not inside the apparatus, are not considered part of a filtering apparatus. The term does not extend to apparatus, e.g. washing machines, of which the filter forms only a part.