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1. (WO1997019454) SEPARATION OF GASES
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1997/019454 International Application No.: PCT/GB1996/002812
Publication Date: 29.05.1997 International Filing Date: 15.11.1996
IPC:
B01D 53/22 (2006.01) ,C01B 21/04 (2006.01) ,C01B 23/00 (2006.01) ,C01B 31/20 (2006.01) ,G21F 9/02 (2006.01)
B PERFORMING OPERATIONS; TRANSPORTING
01
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
D
SEPARATION
53
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
22
by diffusion
C CHEMISTRY; METALLURGY
01
INORGANIC CHEMISTRY
B
NON-METALLIC ELEMENTS; COMPOUNDS THEREOF
21
Nitrogen; Compounds thereof
04
Purification or separation of nitrogen
C CHEMISTRY; METALLURGY
01
INORGANIC CHEMISTRY
B
NON-METALLIC ELEMENTS; COMPOUNDS THEREOF
23
Noble gases; Compounds thereof
C CHEMISTRY; METALLURGY
01
INORGANIC CHEMISTRY
B
NON-METALLIC ELEMENTS; COMPOUNDS THEREOF
31
Carbon; Compounds thereof
20
Carbon dioxide
G PHYSICS
21
NUCLEAR PHYSICS; NUCLEAR ENGINEERING
F
PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
9
Treating radioactively contaminated material; Decontamination arrangements therefor
02
Treating gases
Applicants:
BRITISH NUCLEAR FUELS PLC [GB/GB]; Risley Warrington Cheshire WA3 6AS, GB (AllExceptUS)
BROAN, Christopher, John [GB/GB]; GB (UsOnly)
HUDSON, Ian, David [GB/GB]; GB (UsOnly)
Inventors:
BROAN, Christopher, John; GB
HUDSON, Ian, David; GB
Agent:
GODDARD, David, John ; Harrison Goddard Foote Belmont House 20 Wood Lane Leeds, LS6 2AE, GB
Priority Data:
9523517.217.11.1995GB
Title (EN) SEPARATION OF GASES
(FR) SEPARATION DE GAZ
Abstract:
(EN) A method for the separation of at least one constituent gas from a gas mixture containing the at least one constituent gas and at least one other gas species is described, the method comprising the steps of: providing a stream of the gas mixture to a first membrane of a zeolite material under conditions of pressure and temperature such that the required gas is selectively adsorbed onto a first face of the zeolite material membrane and diffusion through the zeolite membrane towards a second face is promoted; retaining and containing the permeate gas emerging from said membrane second face and passing a retentate of said gas stream not passed through said zeolite membrane either back to the first face of the first zeolite membrane or to a first face of a second zeolite membrane; and, repeating said method steps until a content of the required gas in the gas mixture is reduced to a desired level.
(FR) Cette invention concerne un procédé permettant de séparer au moins un gaz constituant d'un mélange de gaz contenant, en plus du gaz constituant au moins un autre type de gaz. Ledit procédé consiste à amener un courant du mélange de gaz sur une première membrane composée de matière zéolitique, dans des conditions de pression et de température telles que la quantité de gaz nécessaire est adsorbée sur une première face de la membrane en matière zéolitique, ces conditions favorisant la diffusion à travers la membrane en matière zéolitique en direction d'une seconde face; à retenir et à contenir le gaz perméat émergeant de la seconde face de la membrane et à faire passer un rétentat dudit courant gazeux n'ayant pas traversé la membrane zéolitique soit de nouveau en direction de la première face de la première membrane zéolitique soit en direction de la première face d'une seconde membrane zéolitique; et, à répéter les étapes précédentes jusqu'à ce qu'un volume du gaz recherché dans le mélange gazeux soit réduit à un niveau souhaité.
Designated States: CA, CN, JP, KR, RU, UA, US
European Patent Office (AT, BE, CH, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
EP0804795JPH10512808 CN1168192CA2206453KR1019980701355