IPC Main Group
B01D 53/00 Separation 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 or aerosols
Introduced: September 1968
Last revised: January 2006
Classification Context
- Section:
- PERFORMING OPERATIONS; TRANSPORTING
- Class:
- PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- Subclass:
- SEPARATION
Additional Content
Limiting references
Separation of difficult-to-condense gases or air by liquefaction
Application references
For the separation of specific gases or vapours, see the relevant places, e.g. for purification or separation of nitrogen Working-up undefined gaseous mixtures obtained by cracking hydrocarbon oils Cleaning coal gas Working-up of natural gas, or synthetic natural gas For investigating materials
Related Keywords
separating GAS(ES)separation of VAPOUR(S)
8 direct subcodes
Child Classifications
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- B01D 53/02 by adsorption, e.g. preparative gas chromatography
- B01D 53/14 by absorption
- B01D 53/22 by diffusion
- B01D 53/24 by centrifugal force
- B01D 53/26 Drying gases or vapours
- B01D 53/3 Controlling by gas-analysis apparatus
- B01D 53/32 by electrical effects other than those provided for in group
- B01D 53/34 Chemical or biological purification of waste gases
Top Applicants
Top 10 applicants by patent filingsfor class B01, 2013–2023, worldwide · Source: EPO PATSTAT
- SINOPEC (CHINA PETROCHEMICAL CORPORATION) 16,893
- CHINESE ACADEMY OF SCIENCES 11,733
- BASF (BADISCHE ANILIN & SODA FABRIK) DE 3,898
- LG CHEM KR 3,367
- PETROCHINA COMPANY 3,224
- IFPEN (IFP ENERGIES NOUVELLES) FR 3,042
- ZHEJIANG UNIVERSITY 2,890
- MANN + HUMMEL DE 2,740
- JOHNSON MATTHEY GB 2,534
- SAUDI ARABIAN OIL COMPANY SA 2,527