US2786079A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of organic thiols
Assignee: Pure Oil Co
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Filing: 1953-12-28
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Granted: 1957-03-19
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Expires: 1973-12-28
Abstract
No abstract record available.
Inventors
- 👤 Hillis O Folkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:22
CPC Classifications
C; C07; C07C; C07C319/00; C07C319/02; C07C319/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
153 words
IN THE PRODUCTION OF A C1-C18 ALIPHATIC THIOL BY THE REACTION OF A C1-C18 ALIPHATIC ALCOHOL AND HYDROGEN SULFIDE IN THE PRESENCE OF AN ACTIVATED ALIMINA CATALYST HAVING IN COMBINATION THEREWITH AT LEAST ONE HEAT STABLE PROMOTER SELECTED FROM THE GROUP CONSISTING OF OXIDES OF THE ALKALI AND ALKALINE EARTH METALS, ALKAI METAL CARBONATES, PHOSPHATES, HALIDES, SULFIDES, AND SULFATES, AND HEAT STABLE SALTS OF THE OXY ACIDS OF TUNGSTEN CHROMIUM, MOLYBDENUM, URANIUM, AND VANADIUM AT SUITABLE REACTION CONDITIONS OF TEMPERATURE AND PRESSURE, SAID CATALYST BEING CAPABLE OF PROMOTING THE EFFICIENCY OF SAID REACTION AND BEING SUSCEPTIBE TO DEGENERATION IN CATALYTIC ACTIVITY DURING USE, THE IMPROVEMENT WHICH COMPRISES CARRYING OUT SAID PRODUCTION IN THE PRESENCE OF AN ADDED AMOUNT OF AT LEAST ONE SALT SELECTED FROM THE GROUP CONSISTING OF ALKALI AND ALKALINE EARTH METAL SALTS OF CARBOXYLIC ACIDS IN A QUANTITY SUFFICIENT TO MAINTAIN THE ACTIVITY AND SELECTIVITY OF SAID ACTIVATED ALUMINA CATALYST.
Claim 2
Dependent Claim
153 words
IN THE PRODUCTION OF A C1-C18 ALIPHATIC THIOL BY THE REACTION OF A C1-C18 ALIPHATIC ALCOHOL AND HYDROGEN SULFIDE IN THE PRESENCE OF AN ACTIVATED ALIMINA CATALYST HAVING IN COMBINATION THEREWITH AT LEAST ONE HEAT STABLE PROMOTER SELECTED FROM THE GROUP CONSISTING OF OXIDES OF THE ALKALI AND ALKALINE EARTH METALS, ALKAI METAL CARBONATES, PHOSPHATES, HALIDES, SULFIDES, AND SULFATES, AND HEAT STABLE SALTS OF THE OXY ACIDS OF TUNGSTEN CHROMIUM, MOLYBDENUM, URANIUM, AND VANADIUM AT SUITABLE REACTION CONDITIONS OF TEMPERATURE AND PRESSURE, SAID CATALYST BEING CAPABLE OF PROMOTING THE EFFICIENCY OF SAID REACTION AND BEING SUSCEPTIBE TO DEGENERATION IN CATALYTIC ACTIVITY DURING USE, THE IMPROVEMENT WHICH COMPRISES CARRYING OUT SAID PRODUCTION IN THE PRESENCE OF AN ADDED AMOUNT OF AT LEAST ONE SALT SELECTED FROM THE GROUP CONSISTING OF ALKALI AND ALKALINE EARTH METAL SALTS OF CARBOXYLIC ACIDS IN A QUANTITY SUFFICIENT TO MAINTAIN THE ACTIVITY AND SELECTIVITY OF SAID ACTIVATED ALUMINA CATALYST.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-03-18 | 1960-09-17 | 1961-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-03-18 | 1964-09-17 | 1965-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-03-18 | 1968-09-17 | 1969-03-19 | $7700.00 | Window Closed / Lapsed |