US4477267A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molecular sieve zeolite for producing hydrogen by pressure variation adsorption technique
Assignee: Bayer AG
•
Filing: 1982-10-14
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Granted: 1984-10-16
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Expires: 2002-10-14
Abstract
Abstract In the increase of the hydrogen content of a gas rich in hydrogen by contacting the gas with a zeolite which selectively adsorbs the gases other than hydrogen to leave the non-adsorbed gas enriched in hydrogen, and then desorbing the adsorbed gases from the zeolite, the improvement which comprises employing as said zeolite Ca-zeolite X granulate in which at least about 50% of the Na initially present in the zeolite has been replaced by calcium.
Inventors
- 👤 Gerhard Reiss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:55
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/02; B01J; B01J20/00; B01J20/02; B01J20/10; B01J20/16; B01J20/18; B01D2253/00; B01D2253/10; B01D2253/106; B01D2253/108; B01D2253/1085; B01D2256/00; B01D2256/16; B01D2257/00; B01D2257/50; B01D2257/502; B01D2257/504; B01D2257/70; B01D2257/702; B01D2257/7022; B01D2259/00; B01D2259/40; B01D2259/404; B01D53/04; B01D53/047; Y; Y02; Y02C; Y02C20/00; Y02C20/40; Y10; Y10S; Y10S95/00; Y10S95/90; Y10S95/902
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
84 words
In the increase of the hydrogen content of a gas rich in hydrogen and additionally containing CO, CH 4 and CO 2 by contacting the gas with a zeolite which selectively absorbs the gases other than hydrogen to leave the non-absorbed gas enriched in hydrogen, and then desorbing the absorbed gases from the zeolite, the improvement which comprises employing as said zeolite Ca-zeolite X granulate in which at least about 50% of the Na initially present in the zeolite has been replaced by calcium.
Claim 2
Dependent Claim
84 words
In the increase of the hydrogen content of a gas rich in hydrogen and additionally containing CO, CH 4 and CO 2 by contacting the gas with a zeolite which selectively absorbs the gases other than hydrogen to leave the non-absorbed gas enriched in hydrogen, and then desorbing the absorbed gases from the zeolite, the improvement which comprises employing as said zeolite Ca-zeolite X granulate in which at least about 50% of the Na initially present in the zeolite has been replaced by calcium.
Claim 3
Dependent Claim
25 words
A process as claimed in claim 1, wherein the zeolite has a SiO 2 /Al 2 O 3 molar ratio of about 2 to 3%.
Claim 4
Dependent Claim
32 words
A process as claimed in claim 1, wherein the zeolite granulate contains about 10 to 30% by weight of inactive binder and about 70 to 90% by weight of active Ca-zeolite X.
Claim 5
Dependent Claim
45 words
A process as claimed in claim 3, wherein the zeolite has a SiO 2 /Al 2 O 3 molar ratio of about 2 to 3% and the molar content of calcium in the zeolite amounts to between about 0.5 and 1.0CaO/Al 2 O 3 .
Claim 6
Dependent Claim
27 words
A process as claimed in claim 1, wherein the molar content of calcium in the zeolite amounts to between about 0.5 and 1.0CaO/Al 2 O 3 .
Claim 7
Dependent Claim
29 words
A process as claimed in claim 1, wherein the starting gas contains approximately 70-75% of hydrogen, 1-3% of CO, 2-5% of CH 4 and 15-17% of CO 2 .
Claim 8
Dependent Claim
16 words
A process as claimed in claim 6, wherein the starting gas additionally contains 1-5% of nitrogen.
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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) | 1987-10-16 | 1988-04-16 | 1988-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-16 | 1992-04-16 | 1992-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-16 | 1996-04-16 | 1996-10-16 | $7700.00 | Window Closed / Lapsed |