US3627465A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of a water stream containing an ammonium sulfide salt for the production of ammonia and sulfur
Assignee: Universal Oil Products Co
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Filing: 1968-11-04
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Granted: 1971-12-14
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Expires: 1988-11-04
Abstract
Abstract TAINING (NH4)2S2O3 IN ORDER TO SUPPRESS SIDE REACTIONS LEADING TO THIS PRODUCT IN THE OXIDATION STEP. IN THE PRODUCTION OF ELEMENTAL SULFUR AND AMMONIA BY THE OXIDATION OF WASTE WATER CONTAINING AN AMMONIUM SULFIDE SALT IN TE PRESENCE OF AN OXIDATION CATALYST, SUCH AS SOLID PHTHALOCYANINE CATALYST, FOLLOWED BY DECOMPOSITION OF THE RESULTANT AMMONIUM POLYSULFIDE, THEREBY FORMING AQUEOUS AMMONIUM THIOSULFATE, THE CONTINUOUS RECYCLE TO THE OXIDATION STEP OF AN AQUEOUS STREAM CON-
Inventors
- 👤 Robert J J Hamblin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:33
CPC Classifications
C; C01; C01C; C01C1/00; C01C1/02; C01C1/10; C01B; C01B17/00; C01B17/02; C01B17/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1974-12-13 | 1975-06-14 | 1975-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-13 | 1979-06-14 | 1979-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-13 | 1983-06-14 | 1983-12-14 | $7700.00 | Window Closed / Lapsed |