US5137547A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for preparing a gas component from a gas mixture
Assignee: LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
•
Filing: 1991-06-24
•
Granted: 1992-08-11
•
Expires: 2011-06-24
Abstract
Abstract Process for manufacturing a gas component in pure form by separation through adsorption from other components of a gas mixture including inter alia combustible components, of the type in which a flow of the gas mixture at a high cycle pressure is sent through an adsorbent which gives, during a production stage, at the high cycle pressure, the gaseous component which is not adsorbed, for example pure hydrogen, then, during a desorption-elution stage, a desorption gas or residual gas under a low cycle pressure, which is added, after having raised its pressure, to a network of auxiliary gas, which is available under higher pressure, the addition of the residual gas to the auxiliary gas being carried out by sending the residual gas into an ejector which operates under the effect of a driving gas normally available under high pressure.
Inventors
- 👤 Denis Chretien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:56
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/02; B01D53/04; B01D53/0407; B01D53/0446; C; C01; C01B; C01B3/00; C01B3/50; C01B3/501; C01B3/56; C01C; C01C1/00; C01C1/02; C01C1/04; C01C1/0405; C01C1/0476; B01D2256/00; B01D2256/16; B01D2257/00; B01D2257/40; B01D2257/406; B01D2257/70; B01D2257/702; C01B2203/00; C01B2203/04; C01B2203/0405; C01B2203/042; C01B2203/043; C01B2203/0465; C01B2203/0475; Y; Y02; Y02C; Y02C20/00; Y02C20/20; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
110 words
A gas separation process comprising the steps of: passing a flow of a first gas mixture at a first pressure through pressure swing absorption means to produce a product gas substantially at the first pressure and a first residual gas at a second pressure lower than the first pressure; introducing the first residual gas into ejector means supplied with a flow of a driving gas at a third pressure which is higher than the second pressure to produce a flow of a mixed gas; and mixing the flow of the mixed gas with a flow of an auxiliary gas which is at a fourth pressure greater than the second pressure.
Claim 2
Dependent Claim
110 words
A gas separation process comprising the steps of: passing a flow of a first gas mixture at a first pressure through pressure swing absorption means to produce a product gas substantially at the first pressure and a first residual gas at a second pressure lower than the first pressure; introducing the first residual gas into ejector means supplied with a flow of a driving gas at a third pressure which is higher than the second pressure to produce a flow of a mixed gas; and mixing the flow of the mixed gas with a flow of an auxiliary gas which is at a fourth pressure greater than the second pressure.
Claim 3
Dependent Claim
17 words
The process of claim 1, wherein said third and fourth pressures are of substantially the same magnitude.
Claim 4
Dependent Claim
21 words
The process of claim 12, wherein the driving gas is derived from said first gas mixture by withdrawing a portion therefrom.
Claim 5
Dependent Claim
12 words
The process of claim 1, wherein the first gas mixture contains hydrogen.
Claim 6
Dependent Claim
12 words
The process of claim 4, wherein the first gas mixture contains hydrocarbons.
Claim 7
Dependent Claim
13 words
The process of claim 5, wherein the auxiliary gas is a fuel gas.
Claim 8
Dependent Claim
72 words
The process of claim 1, further comprising the steps of: directing a flow of a second gas mixture at a fifth pressure higher than the first pressure to a permeation separating unit to separate the second gas mixture into the first gas mixture at the first pressure and into a second residual gas substantially at the fifth pressure and supplying the second residual gas to said ejector means as the driving gas.
Claim 9
Dependent Claim
12 words
The process of claim 7, wherein the second gas mixture contains hydrogen.
Claim 10
Dependent Claim
12 words
The process of claim 8, wherein the first gas mixture contains hydrocarbons.
Claim 11
Dependent Claim
13 words
The process of claim 9, wherein the auxiliary gas is a fuel gas.
References Cited (Backward Citations)
US2273350A
Cited
US3696588A
Cited
US3934989A
Cited
US3834136A
Cited
FR2442983A1
Cited
US4314828A
Cited
US4331456A
Cited
US4238204A
Cited
US4229188A
Cited
US4421532A
Cited
US4436534A
Cited
US4701187A
Cited
EP0266745A2
Cited
US4919695A
Cited
EP0344053A1
Cited
US4880449A
Cited
US4863492A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-08-11 | 1996-02-10 | 1996-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-08-11 | 2000-02-10 | 2000-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-08-11 | 2004-02-10 | 2004-08-11 | $7700.00 | Window Closed / Lapsed |