Patent US2829171A successfully refreshed from Google Patents.
US2829171A
Expired / Lapsed
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Preparation of mercaptans and sulfides
Assignee: Union Oil Company of California
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Filing: 1953-10-26
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Granted: 1958-04-01
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Expires: 1973-10-26
Abstract
No abstract record available.
Inventors
- 👤 Thomas F Doumani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:57
CPC Classifications
C; C07; C07C; C07C319/00; C07C319/14; C07C319/02; C07C319/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
A PROCESS FOR PREPARING LOWER ALKYL MERCAPTANS WHICH COMPRISES PASSING A MIXTURE COMPRISING A LOWER ALKANOL AND A LOWER ALKYL MERCAPTAN OVER AN ADSORBENT OXIDE CATALYST IN A FIRST REACTION ZONE AT A TEMPERATURE BETWEEN ABOUT 600* AND 1100*F., SEPARATING THE PRODUCT GASES INTO AN ESSENTIALLY WATER-FREE ALKYL SULFIDE STREAM AND AN ESSENTIALLY ALKYL SULFIDE-FREE AQUEOUS STREAM, PASSING SAID ALKYL SULFIDE STREAM IN ADMIXTURE WITH HYDROGEN SULFIDE OVER AN ADSORBENT OXIDE CATALYST IN A SECOND REACTION ZONE AT A TEMPERATURE BETWEEN ABOUT 700* AND 1200*F., RECOVERING ALKYL MERCAPTAN FROM THE PRODUCT STREAM FROM SAID SECOND REACTION ZONE, AND RECYCLING A PORTION OF SAID MERCAPTAN TO SAID FIRST REACTION ZONE, THE REACTANTS IN SAID FIRST REACTION ZONE BEING SUBSTANTIALLY FREE OF HYDROGEN SULFIDE, AND THE REACTANTS IN SAID SECOND REACTION ZONE BEING SUBSTANTIALLY FREE OF LOWER ALKANOL.
Claim 2
Dependent Claim
136 words
A PROCESS FOR PREPARING LOWER ALKYL MERCAPTANS WHICH COMPRISES PASSING A MIXTURE COMPRISING A LOWER ALKANOL AND A LOWER ALKYL MERCAPTAN OVER AN ADSORBENT OXIDE CATALYST IN A FIRST REACTION ZONE AT A TEMPERATURE BETWEEN ABOUT 600* AND 1100*F., SEPARATING THE PRODUCT GASES INTO AN ESSENTIALLY WATER-FREE ALKYL SULFIDE STREAM AND AN ESSENTIALLY ALKYL SULFIDE-FREE AQUEOUS STREAM, PASSING SAID ALKYL SULFIDE STREAM IN ADMIXTURE WITH HYDROGEN SULFIDE OVER AN ADSORBENT OXIDE CATALYST IN A SECOND REACTION ZONE AT A TEMPERATURE BETWEEN ABOUT 700* AND 1200*F., RECOVERING ALKYL MERCAPTAN FROM THE PRODUCT STREAM FROM SAID SECOND REACTION ZONE, AND RECYCLING A PORTION OF SAID MERCAPTAN TO SAID FIRST REACTION ZONE, THE REACTANTS IN SAID FIRST REACTION ZONE BEING SUBSTANTIALLY FREE OF HYDROGEN SULFIDE, AND THE REACTANTS IN SAID SECOND REACTION ZONE BEING SUBSTANTIALLY FREE OF LOWER ALKANOL.
References Cited (Backward Citations)
US2667515A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-31 | 1961-09-30 | 1962-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-31 | 1965-09-30 | 1966-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-31 | 1969-09-30 | 1970-04-01 | $7700.00 | Window Closed / Lapsed |