SEPARATION (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 B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28)

Introduced: September 1968

Description

B01D encompasses physical and chemical processes and apparatus for separating materials based on differences in their physical or chemical properties. This subclass covers a broad range of separation technologies including filtration, distillation, evaporation, crystallization, adsorption, chromatography, centrifugation, and membrane-based processes. The classification applies to apparatus and methods for liquid-liquid, liquid-solid, gas-liquid, and gas-solid separations across industrial, laboratory, and environmental applications. Adjacent classes address more specialized separation contexts (such as metallurgical processes in B22 or specific chemical syntheses), whereas B01D focuses on fundamental separation operations applicable across multiple technical fields.

Title

Titles differ between systems:

IPC: SEPARATION

CPC: SEPARATION (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 B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28)

Full Title

Full titles differ between systems:

IPC:

SEPARATION

CPC:

SEPARATION (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 B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28)

Of 67 combined children, 38 exist in both systems.

29 codes are CPC-only extensions.

Note: 29 CPC extensions are marked as secondary classification only.

22 shared codes have differing titles between IPC and CPC.

Child Classifications

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B01D 1/00 Evaporating ( ; removal of incrustation B08B; preparation of starch C08B30/00; sugar industry C13; prevention of incrustation C23F; drying solid materials or objects by evaporating liquids therefrom F26) +6 CPC IPC+CPC Available in IPC and CPC
B01D 11/00 Solvent extraction +3 CPC IPC+CPC Available in IPC and CPC
B01D 12/00 Displacing liquid, e.g. from wet solids or from dispersions of liquids or from solids in liquids, by means of another liquid IPC+CPC Available in IPC and CPC
B01D 15/00 Separating processes involving the treatment of liquids with solid sorbents; Apparatus therefor −1 IPC IPC+CPC Available in IPC and CPC
B01D 17/00 Separation 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 C02F1/40; cleaning or keeping clear the surface of open water from oil or like materials E02B15/04; arrangements for separating lubricants from refrigerants F25B43/02) +2 CPC −1 IPC IPC+CPC Available in IPC and CPC
B01D 19/00 Degasification of liquids +8 CPC IPC+CPC Available in IPC and CPC
B01D 21/00 Separation of suspended solid particles from liquids by sedimentation ( ; differential sedimentation B03D3/00; devices for separating or removing fatty or oily substances or similar floating material from water, waste water or sewage C02F1/40) +16 CPC IPC+CPC Available in IPC and CPC
B01D 2101/00 Types of filters having loose filtering material 2nd only +3 CPC CPC only CPC only
B01D 2201/00 Details relating to filtering apparatus 2nd only +33 CPC CPC only CPC only
B01D 2202/00 Details concerning evaporation, distillation or condensation 2nd only +2 CPC CPC only CPC only
B01D 2221/00 Applications of separation devices 2nd only +8 CPC CPC only CPC only
B01D 2239/00 Aspects relating to filtering material for liquid or gaseous fluids 2nd only +6 CPC CPC only CPC only
B01D 2247/00 Details relating to the separation of dispersed particles from gases, air or vapours by liquid as separating agent 2nd only +7 CPC CPC only CPC only
B01D 2251/00 Reactants 2nd only +10 CPC CPC only CPC only
B01D 2252/00 Absorbents, i.e. solvents and liquid materials for gas absorption 2nd only +6 CPC CPC only CPC only
B01D 2253/00 Adsorbents used in seperation treatment of gases and vapours 2nd only +4 CPC CPC only CPC only
B01D 2255/00 Catalysts 2nd only +9 CPC CPC only CPC only
B01D 2256/00 Main component in the product gas stream after treatment 2nd only +9 CPC CPC only CPC only
B01D 2257/00 Components to be removed 2nd only +12 CPC CPC only CPC only
B01D 2258/00 Sources of waste gases 2nd only +4 CPC CPC only CPC only