Patent US3909206A successfully refreshed from Google Patents.
US3909206A
Expired / Lapsed
US
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High performance carbon dioxide scrubber
Assignee: RTX Corp
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Filing: 1974-04-10
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Granted: 1975-09-30
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Expires: 1994-04-10
Abstract
Abstract A scrubber uses finely ground alkali hydroxide particles mixed with fine particles of a hydrophobic material such as polytetrafluoroethylene, for removing carbon dioxide from a gas stream to a concentration of less than one-quarter of a part per million.
Inventors
- 👤 Murray Katz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:05
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/14; B01D53/1456; B01D53/1475; B01D53/1493; H; H01; H01M; H01M8/00; H01M8/06; H01M8/0662; Y; Y02; Y02A; Y02A50/00; Y02A50/20; Y02C; Y02C20/00; Y02C20/40; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
121 words
A SCRUBBER FOR REMOVING CARBON DIOXIDE FROM A FUEL CELL REACTANT GAS STREAM TO A CONCENTRATION OF LESS THAN ONE-QUARTER OF A PART PER MILLION PARTS COMPRISING: A CONTAINER INCLUDING A GAS INLET AND A GAS OUTLET, AND A PACKED BED OF PARTICLES DISPOSED IN SAID CONTAINER COMPRISING ALKALI HYDROXIDE PARTICLES NO GREATER THAN 10 MICRONS IN DIAMETER AND HYDROPHOTOBIC PARTICLES WHICH ARE INERT TO WATER, SAID HYDROPHOBIC PARTICLES BEING OF SUBSTANTIALLY NO GREATER SIZE THAN SAID ALKALI HYDROXIDE PARTICLES AND BEING UNIFORMLY DISTRIBUTED THROUGHT SAID ALKALI HYDROXIDE PARTICLES SO AS TO KEEP A SUBSTANTIAL PORTION OF SAID ALKALI HYDROXIDE PARTICLES SEPARATED FROM ONE ANOTHER, SAID HYDROPHOBIC PARTICLES COMPRISING BETWEEN 10 AND 60% BY VOLUME OF SAID PACKED BED OF PARTICLES.
Claim 2
Dependent Claim
121 words
A SCRUBBER FOR REMOVING CARBON DIOXIDE FROM A FUEL CELL REACTANT GAS STREAM TO A CONCENTRATION OF LESS THAN ONE-QUARTER OF A PART PER MILLION PARTS COMPRISING: A CONTAINER INCLUDING A GAS INLET AND A GAS OUTLET, AND A PACKED BED OF PARTICLES DISPOSED IN SAID CONTAINER COMPRISING ALKALI HYDROXIDE PARTICLES NO GREATER THAN 10 MICRONS IN DIAMETER AND HYDROPHOTOBIC PARTICLES WHICH ARE INERT TO WATER, SAID HYDROPHOBIC PARTICLES BEING OF SUBSTANTIALLY NO GREATER SIZE THAN SAID ALKALI HYDROXIDE PARTICLES AND BEING UNIFORMLY DISTRIBUTED THROUGHT SAID ALKALI HYDROXIDE PARTICLES SO AS TO KEEP A SUBSTANTIAL PORTION OF SAID ALKALI HYDROXIDE PARTICLES SEPARATED FROM ONE ANOTHER, SAID HYDROPHOBIC PARTICLES COMPRISING BETWEEN 10 AND 60% BY VOLUME OF SAID PACKED BED OF PARTICLES.
Claim 3
Dependent Claim
13 words
The scrubber according to claim 1 wherein said hydrophobic particles comprise polytetrafluoroethylene particles.
Claim 4
Dependent Claim
114 words
A scrubber for removing carbon dioxide from a fuel cell reactant gas stream to a concentration of less than one-quarter of a part per million parts comprising: a container including a gas inlet and a gas outlet; and a packed bed of particles disposed in said container comprising alkali hydroxide particles no greater than 10 microns in diameter and polytetrafluoroethylene particles of substantially no greater size than the alkali hydroxide particles, said polytetrafluoroethylene particles being uniformly distributed throughout said alkali hydroxide particles so as to keep a substantial portion of said alkali hydroxide particles separated from one another, said polytetrafluoroethylene particles comprising between 10 and 60% by volume of said packed bed of particles.
Claim 5
Dependent Claim
114 words
A scrubber for removing carbon dioxide from a fuel cell reactant gas stream to a concentration of less than one-quarter of a part per million parts comprising: a container including a gas inlet and a gas outlet; and a packed bed of particles disposed in said container comprising alkali hydroxide particles no greater than 10 microns in diameter and polytetrafluoroethylene particles of substantially no greater size than the alkali hydroxide particles, said polytetrafluoroethylene particles being uniformly distributed throughout said alkali hydroxide particles so as to keep a substantial portion of said alkali hydroxide particles separated from one another, said polytetrafluoroethylene particles comprising between 10 and 60% by volume of said packed bed of particles.
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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) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |