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US3186789A
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Method of removing hydrogen sulfide from gases
Assignee: Union Carbide Corp
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Filing: 1961-03-29
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Granted: 1965-06-01
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Expires: 1981-03-29
Abstract
No abstract record available.
Inventors
- 👤 Douglas M Ward
- 👤 Ellen J Shuttler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:59
CPC Classifications
C; C10; C10K; C10K1/00; C10K1/20; C10K1/30; C07; C07C; C07C7/00; C07C7/148; C07C7/14808; C07C7/14816
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A PROCESS FOR SWEETENING A GAS STREAM CONTAINING HYDROGEN SULFIDE IMPURITY WHICH CONPRISES: CONTACTING SUCH GAS STREAM WITH A CATALYST CONSISTING OF CRYSTALLINE ZEOLITIC MOLECULAR SIEVE MATERIAL HAVING AN APPARENT PORE SIZE OF AT LEAST 4.6 ANGSTROM UNITS, SAID CONTACTING BEING IN THE PRESENCE OF FREE OXYGEN AT TEMPERATURE BELOW 700* C. SO AS TO PRODUCE ELEMENTAL SULFUR AND SUFFICIENTLY LOW FOR DEPOSITION AND ADSORPTION OF THE SULFUR IN SAID CATALYST; RECOVERING AN IMPURITY-DEPLETED STREAM; AND REMOVING THE ABSORBED SULFUR FROM SAID CATALYST BY CONTACTING THE CATALYST WITH ETHYLENE AT SUFFICIENTLY HIGH TEMPERATURE TO FORM HYDROGEN SULFIDE, AND BELOW 700*C.
Claim 2
Dependent Claim
100 words
A PROCESS FOR SWEETENING A GAS STREAM CONTAINING HYDROGEN SULFIDE IMPURITY WHICH CONPRISES: CONTACTING SUCH GAS STREAM WITH A CATALYST CONSISTING OF CRYSTALLINE ZEOLITIC MOLECULAR SIEVE MATERIAL HAVING AN APPARENT PORE SIZE OF AT LEAST 4.6 ANGSTROM UNITS, SAID CONTACTING BEING IN THE PRESENCE OF FREE OXYGEN AT TEMPERATURE BELOW 700* C. SO AS TO PRODUCE ELEMENTAL SULFUR AND SUFFICIENTLY LOW FOR DEPOSITION AND ADSORPTION OF THE SULFUR IN SAID CATALYST; RECOVERING AN IMPURITY-DEPLETED STREAM; AND REMOVING THE ABSORBED SULFUR FROM SAID CATALYST BY CONTACTING THE CATALYST WITH ETHYLENE AT SUFFICIENTLY HIGH TEMPERATURE TO FORM HYDROGEN SULFIDE, AND BELOW 700*C.
References Cited (Backward Citations)
US2971824A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-05-31 | 1968-11-30 | 1969-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-05-31 | 1972-11-30 | 1973-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-05-31 | 1976-11-30 | 1977-06-01 | $7700.00 | Window Closed / Lapsed |