IPC Definitions - January 01, 2012
B01D - Definition
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 |
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.
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. |