US2729591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sweetening of petroleum oils containing mercaptans with alkali and oxygen and then with alkali, a solutizer and oxygen
Assignee: BP PLC
•
Filing: 1952-06-20
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Granted: 1956-01-03
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Expires: 1972-06-20
Abstract
No abstract record available.
Inventors
- 👤 Haresnape Dorothy Sylvia
- 👤 Denyer Ronald Leonard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:09
CPC Classifications
C; C10; C10G; C10G27/00; C10G27/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
A PROCESS OF SWEETENING A PETROLEUM OIL CONTAINING MERCAPTANS, WHICH COMPRISES MIXING THE OIL WITH AN AQUEOUS CAUSTIC ALKALI SOLUTION IN THE PRESENCE OF FREE OXYGEN, SO AS TO CONVERT PART OF SAID MERCAPTANS INTO DISULPHIDES, SEPARATING THE OIL FROM THE CAUSTIC ALKALI SOLUTION, MIXING THE SEPARATED OIL IN THE PRESENCE OF FREE OXYGEN BUT IN THE ABSENCE OF A CATALYST FOR THE OXIDATION OF MERCAPTANS TO DISULPHIDES WITH AN AQUEOUS CAUSTIC ALKALI SOLUTION CONTAINING A SUBSTANCE WHICH IS CAPABLE OF INCREASING THE SOLUBILITY OF THE MERCAPTANS IN THE ALKALI SOLUTION, SO AS TO EFFECT A FURTHER CONVERSION OF MERCAPTANS INTO DISULPHIDES, AND SEPARATING A SWEETENED OIL FROM THE CAUSTIC ALKALI SOLUTION.
Claim 2
Dependent Claim
112 words
A PROCESS OF SWEETENING A PETROLEUM OIL CONTAINING MERCAPTANS, WHICH COMPRISES MIXING THE OIL WITH AN AQUEOUS CAUSTIC ALKALI SOLUTION IN THE PRESENCE OF FREE OXYGEN, SO AS TO CONVERT PART OF SAID MERCAPTANS INTO DISULPHIDES, SEPARATING THE OIL FROM THE CAUSTIC ALKALI SOLUTION, MIXING THE SEPARATED OIL IN THE PRESENCE OF FREE OXYGEN BUT IN THE ABSENCE OF A CATALYST FOR THE OXIDATION OF MERCAPTANS TO DISULPHIDES WITH AN AQUEOUS CAUSTIC ALKALI SOLUTION CONTAINING A SUBSTANCE WHICH IS CAPABLE OF INCREASING THE SOLUBILITY OF THE MERCAPTANS IN THE ALKALI SOLUTION, SO AS TO EFFECT A FURTHER CONVERSION OF MERCAPTANS INTO DISULPHIDES, AND SEPARATING A SWEETENED OIL FROM THE CAUSTIC ALKALI SOLUTION.
References Cited (Backward Citations)
CA471373A
Cited
CA475538A
Cited
US2413945A
Cited
US2427212A
Cited
GB629914A
Cited
US2474028A
Cited
US2552399A
Cited
US2638439A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-02 | 1959-07-04 | 1960-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-02 | 1963-07-04 | 1964-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-02 | 1967-07-04 | 1968-01-03 | $7700.00 | Window Closed / Lapsed |