US4062932A
Expired / Lapsed
US
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Process for the catalytic oxidation of hydrogen sulfide with sulfur dioxide
Assignee: University of Southern California
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Filing: 1976-08-05
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Granted: 1977-12-13
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Expires: 1996-08-05
Abstract
Abstract A process for the oxidation of hydrogen sulfide with sulfur dioxide to produce sulfur which comprises combining the hydrogen sulfide with a one-half molar equivalent of sulfur dioxide and passing the hydrogen sulfide-sulfur dioxide mixture over a ceramic catalyst of the following formula at a temperature between about 100 DEG C. and about 800 DEG C.:
Inventors
- 👤 James M. Whelan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:02
CPC Classifications
F; F23; F23C; F23C13/00; B; B01; B01D; B01D53/00; B01D53/34; B01D53/74; B01D53/86; B01D53/8603; B01D53/92; B01D53/94; B01D53/9445; B01D53/945; B01J; B01J23/00; B01J23/10; B01J23/70; B01J23/76; B01J23/78; C; C01; C01B; C01B17/00; C01B17/02; C01B17/04; C01B17/0473; C01B17/0486; C01B17/48; C01B17/50; C01B17/508; C01B17/69; C01B17/74; C01B17/76; C01B17/78; C01B21/00; C01B21/02; C01B21/20; C01B21/24; C01B21/26; C01B21/265; C01B32/00; C01B32/50; C01C; C01C3/00; C01C3/02; C04; C04B; C04B35/00; C04B35/50; F23C13/08; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
169 words
A process for the oxidation of hydrogen sulfide with sulfur dioxide to produce sulfur which comprises: combining the hydrogen sulfide with a one-half molar equivalent of sulfur dioxide, and passing the hydrogen sulfide-sulfur dioxide mixture over a ceramic catalyst of the following formula at a temperature between 100° C. and about 800° C.: w.sub.k X.sub.n J .sub.(1-k-n) ZO (±m) wherein W is zirconium, tin or thorium, or mixture thereof; X is an alkaline earth metal or mixture thereof; J is scandium, yttrium, a rare-earth element or mixture thereof; Z is a metal of the first transition series or a mixture thereof, at least 0.01% of said metal having an oxidation state other than +3; k is a number having a value between 0 and about 0.1; m is a number having a value of from 0 to about 0.26; and n is a number having a value from 0 to about 0.51, provided when n has a value of 0, k has a value between 0 and about 0.05.
Claim 2
Dependent Claim
169 words
A process for the oxidation of hydrogen sulfide with sulfur dioxide to produce sulfur which comprises: combining the hydrogen sulfide with a one-half molar equivalent of sulfur dioxide, and passing the hydrogen sulfide-sulfur dioxide mixture over a ceramic catalyst of the following formula at a temperature between 100° C. and about 800° C.: w.sub.k X.sub.n J .sub.(1-k-n) ZO (±m) wherein W is zirconium, tin or thorium, or mixture thereof; X is an alkaline earth metal or mixture thereof; J is scandium, yttrium, a rare-earth element or mixture thereof; Z is a metal of the first transition series or a mixture thereof, at least 0.01% of said metal having an oxidation state other than +3; k is a number having a value between 0 and about 0.1; m is a number having a value of from 0 to about 0.26; and n is a number having a value from 0 to about 0.51, provided when n has a value of 0, k has a value between 0 and about 0.05.
References Cited (Backward Citations)
US3926854A
Cited
US3885026A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-12-12 | 1981-06-13 | 1981-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-12 | 1985-06-13 | 1985-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-12 | 1989-06-13 | 1989-12-13 | $7700.00 | Window Closed / Lapsed |