US4990168A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of carbon dioxide from a carbon dioxide plant vent gas using membranes
Assignee: American Air Liquide Inc
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Filing: 1989-07-17
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Granted: 1991-02-05
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Expires: 2009-07-17
Abstract
Abstract A process for recovering CO 2 from a CO 2 liquifaction plant vent gas, which comprises feeding vent gas from a CO 2 liquifaction plant to a first semi-permeable gas separation membrane through which and at a pressure at which CO 2 is capable of diffusing therethrough, to form a CO 2 -enriched permeate, and then returning the CO 2 -enriched permeate to a feed side of said CO 2 liquifaction plant at a pressure capable of effecting the same.
Inventors
- 👤 Richard A. Sauer
- 👤 Joseph E. Paganessi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:03
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/06; F25J3/0605; F25J3/0625; B; B01; B01D; B01D53/00; B01D53/22; C; C01; C01B; C01B32/00; C01B32/50; F25J3/063; F25J3/067; F25J2200/00; F25J2200/74; F25J2205/00; F25J2205/40; F25J2205/80; F25J2205/82; F25J2210/00; F25J2210/70; F25J2215/00; F25J2215/04; F25J2220/00; F25J2220/80; F25J2220/82; F25J2270/00; F25J2270/90; Y; Y02; Y02C; Y02C20/00; Y02C20/40; Y02P; Y02P20/00; Y02P20/151; Y10; Y10S; Y10S62/00; Y10S62/928; Y10S62/929
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
104 words
A process for recovering CO 2 from a CO 2 liquefaction plant vent gas, said process consisting essentially of: (1) feeding said vent gas to at least a first semipermeable gas separation membrane to form a CO 2 -enriched permeate and non-permeating gas; (2) venting said non-permeating gas to the atmosphere; (3) optionally passing said CO 2 -enriched permeate from said first semipermeable gas separation membrane to a second semipermeable gas separation membrane; (4) optionally passing said CO 2 -enriched permeate through a passive catalytic burn-out unit; and (5) passing said CO 2 -enriched permeate to a feed-input of said CO 2 liquefaction plant.
Claim 2
Dependent Claim
104 words
A process for recovering CO 2 from a CO 2 liquefaction plant vent gas, said process consisting essentially of: (1) feeding said vent gas to at least a first semipermeable gas separation membrane to form a CO 2 -enriched permeate and non-permeating gas; (2) venting said non-permeating gas to the atmosphere; (3) optionally passing said CO 2 -enriched permeate from said first semipermeable gas separation membrane to a second semipermeable gas separation membrane; (4) optionally passing said CO 2 -enriched permeate through a passive catalytic burn-out unit; and (5) passing said CO 2 -enriched permeate to a feed-input of said CO 2 liquefaction plant.
Claim 3
Dependent Claim
44 words
The process according to claim 1, wherein said vent gas is fed to said first semi-permeable gas membrane at a pressure in the range of about 260 to 315 psia and at a temperature in the range of about -10° F. to 5° F.
Claim 4
Dependent Claim
44 words
The process according to claim 2, wherein said vent gas is fed to said first semi-permeable gas membrane at a pressure in the range of about 300 to 310 psia and at a temperature in the range of about -5° F. to 0° F.
Claim 5
Dependent Claim
33 words
The process according to claim 3, wherein said vent gas is fed to said first semi-permeable gas membrane at a pressure of about 305 psia and at a temperature of about -2° F.
Claim 6
Dependent Claim
23 words
The process according to claim 1, wherein the pressure at the first membrane feed side and permeate side is maintained by pressure regulators.
Claim 7
Dependent Claim
27 words
The process according to claim 1, wherein said pressure on the permeate side of said first membrane is in the range of about 15 to 40 psia.
Claim 8
Dependent Claim
27 words
The process according to claim 6, wherein said pressure on the permeate side of said first membrane is in the range of about 15 to 30 psia.
Claim 9
Dependent Claim
21 words
The process according to claim 7, wherein said pressure on the permeate side of said first membrane is about 23 psia.
Claim 10
Dependent Claim
28 words
The process according to claim 1, wherein said CO 2 -enriched permeate from said first semi-permeable gas separation membrane is fed to a second semi-permeable gas separation membrane.
Claim 11
Dependent Claim
27 words
The process according to claim 1, wherein said CO 2 -enriched permeate from said first semi-permeable gas separation membrane is fed to a passive catalytic burn-out unit.
Claim 12
Dependent Claim
27 words
The process according to claim 9, wherein said CO 2 -enriched permeate from said second semi-permeable gas separation membrane is fed to a passive catalytic burn-out unit.
Claim 13
Dependent Claim
17 words
The process according to claim 1, wherein said semi-permeable gas membrane comprises a bundle of hollow fibers.
Claim 14
Dependent Claim
21 words
The process according to claim 12, wherein said semi-permeable gas membrane has an increased selectivity for carbon dioxide with decreasing temperature.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-02-04 | 1994-08-06 | 1995-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-02-04 | 1998-08-06 | 1999-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-02-04 | 2002-08-06 | 2003-02-05 | $7700.00 | Window Closed / Lapsed |