US5292360A
Expired / Lapsed
US
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5A zeolite/kaolinite adsorbent for gas purification
Assignee: IFP Energies nouvelles
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Filing: 1992-05-27
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Granted: 1994-03-08
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Expires: 2012-05-27
Abstract
Abstract Adsorbent material well adapted for the purification of gases (notably by the PSA and TSA methods) by adsorbing impurities therefrom that are more polar or polarizable than the gases to be purified, e.g., nitrogen, the oxides of carbon and hydrocarbons, comprises a matrix of a type 5A zeolite molecular sieve and a kaolinite clay binder therefor, the clay binder having a concentration of at least 75% by dry weight of kaolinite and a maximum quartz concentration of 20% by dry weight.
Inventors
- 👤 Bernard Pacaud
- 👤 Marc Mercier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:12
CPC Classifications
C; C01; C01B; C01B3/00; C01B3/50; C01B3/56; B; B01; B01D; B01D53/00; B01D53/02; B01J; B01J20/00; B01J20/02; B01J20/10; B01J20/16; B01J20/18; B01J20/183; C01B2203/00; C01B2203/04; C01B2203/042; C01B2203/043; C01B2203/0465; C01B2203/047; C01B2203/0475; C01B2203/048; Y; Y10; Y10S; Y10S95/00; Y10S95/90; Y10S95/902
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
93 words
A process for the purification of gases by passing same over a zeolite molecular sieve to adsorb impurities therefrom, the improvement which comprises utilizing as the adsorbent therefor, an adsorbent material adapted for the purification of gases by adsorbing impurities therefrom that are more polar or polarizable than the gases to be purified, comprising a matrix of a 5A zeolite molecular sieve and a kaolinite clay binder therefor, said clay binder comprising a concentration of at least 75% by dry weight of kaolinite and a maximum quartz concentration of 20% by dry weight.
Claim 2
Dependent Claim
93 words
A process for the purification of gases by passing same over a zeolite molecular sieve to adsorb impurities therefrom, the improvement which comprises utilizing as the adsorbent therefor, an adsorbent material adapted for the purification of gases by adsorbing impurities therefrom that are more polar or polarizable than the gases to be purified, comprising a matrix of a 5A zeolite molecular sieve and a kaolinite clay binder therefor, said clay binder comprising a concentration of at least 75% by dry weight of kaolinite and a maximum quartz concentration of 20% by dry weight.
Claim 3
Dependent Claim
19 words
The process as defined by claim 1, comprising from 10% to 40% by weight of said kaolinite clay binder.
Claim 4
Dependent Claim
19 words
The process as defined by claim 2, comprising from 10% to 30% by weight of said kaolinite clay binder.
Claim 5
Dependent Claim
22 words
The process as defined by claim 1, said clay binder comprising a concentration of at least 80% by dry weight of kaolinite.
Claim 6
Dependent Claim
20 words
The process as defined by claim 1, said clay binder comprising a maximum quartz concentration of 12% by dry weight.
Claim 7
Dependent Claim
30 words
The process as defined by claim 1, said clay binder comprising hexagonal platelets of kaolinite, the major portion of which having a mean diameter ranging from 500 to 5,000 Å.
Claim 8
Dependent Claim
19 words
The process as defined by claim 1, said 5A zeolite molecular sieve being at least 65% divalent cation exchanged.
Claim 9
Dependent Claim
21 words
The process as defined by claim 7, said type 5A zeolite molecular sieve being from 65% to 85% divalent cation exchanged.
Claim 10
Dependent Claim
13 words
The process as defined by claim 7, said exchanged divalent cation being calcium.
Claim 11
Dependent Claim
20 words
The process as defined by claim 1, said 5A zeolite molecular sieve having a halogen concentration of less than 0.15%.
Claim 12
Dependent Claim
19 words
The process as defined by claim 1, said impurities comprising nitrogen, an oxide of carbon, methane, of a hydrocarbon.
Claim 13
Dependent Claim
14 words
The process as defined by claim 1, said gas to be purified comprising hydrogen.
Claim 14
Dependent Claim
14 words
The process as defined by claim 1, said gas to be purified comprising air.
Claim 15
Dependent Claim
36 words
The process as defined by claim 1, comprising a pressure swing adsorption gas purification wherein the gas is passed over the adsorbent under high pressure and at low temperature followed by regenerating the adsorbent by decompression.
Claim 16
Dependent Claim
36 words
The process as defined by claim 1, comprising a temperature swing adsorption gas purification wherein the gas is passed over the adsorbent under high pressure and at low temperature followed by regenerating the adsorbent by heating.
Claim 17
Dependent Claim
35 words
A process according to claim 1, wherein said clay binder comprises a concentration of at least 88% by dry weight of kaolinite and a quartz concentration from about 5% to about 12% by dry weight.
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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) | 1997-03-07 | 1997-09-06 | 1998-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-03-07 | 2001-09-06 | 2002-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-03-07 | 2005-09-06 | 2006-03-08 | $7700.00 | Window Closed / Lapsed |