Patent US3620969A successfully refreshed from Google Patents.
US3620969A
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Desulfurization by selective adsorption with a crystalline zeolitic molecular sieve
Assignee: Union Carbide Corp
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Filing: 1969-10-15
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Granted: 1971-11-16
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Expires: 1989-10-15
Abstract
Abstract Sulfur compounds are removed from liquid hydrocarbon streams by selective adsorption on zeolitic molecular sieves and periodic desorption therefrom using a hot purge gas having a high water content. Regeneration of the adsorbent is carried out only to the degree that less than about 5 and more than about 2 weight percent water remains adsorbed on the zeolite.
Inventors
- 👤 Philip Hain Turnock
- 👤 Max Nai Yuen Lee
- 👤 Krishan Dayal Manchanda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:23
CPC Classifications
C; C10; C10G; C10G25/00; C10G25/02; C10G25/03; C10G25/05; Y; Y10; Y10S; Y10S502/00; Y10S502/515; Y10S502/517
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
Process according to claim 1 wherein the temperature of the purge gas is between about 450* and about 700* F., the pressure of the purge gas in contact with the zeolitic molecular sieve adsorbent is from about 15 to about 100 p.s.i.a., and the dew point of the purge gas stream is between 10* and 160* F.
Claim 2
Dependent Claim
21 words
Process according to claim 2 wherein the dew point of the purge gas stream is between 60* F. and 140* F.
References Cited (Backward Citations)
US2319738A
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US2908639A
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US3075023A
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US3360481A
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US3330778A
Cited
US3398208A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-15 | 1975-05-17 | 1975-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-15 | 1979-05-17 | 1979-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-15 | 1983-05-17 | 1983-11-16 | $7700.00 | Window Closed / Lapsed |