US2879227A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for sweetening hydrocarbons with elemental sulfur caustic and air in the presence of a lead sulfide catalyst
Assignee: ExxonMobil Oil Corp
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Filing: 1957-05-24
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Granted: 1959-03-24
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Expires: 1977-05-24
Abstract
No abstract record available.
Inventors
- 👤 Jr Frank W Brooks
- 👤 Jr Harry R Sharpless
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:14
CPC Classifications
C; C10; C10G; C10G27/00; C10G27/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
A METHOD OF SWEETENING PETROLEUM DISTILLATES WHICH COMPRISES MIXING A PETROLEUM DISTILLATE CONTAINING MERCAPTANS WITH AN AMOUNT OF ELEMENTAL SULFUR AT LEAST SUBSTANTIALLY STOICHIOMETRICALLY EQUIVALENT TO THE MERCAPTAN CONTENT OF SAID DISTILLATE AND NOT GREATER THAN ABOUT 2 TIMES SAID STOICHIOMETRICALLY EQUIVALENT AMOUNT AND FREE OXYGEN-CONTAINING GAS, CONTACTING SAID MIXTURE OF DISTILATE, ELEMENTAL SULFUR AND AIR WITH A BED OF SOLID CATALYST COMPRISING LEAD COMPOUNDS SELECTED FROM THE CLASS CONSISTING OF LEAD SULFIDE AND LEAD OXIDE DISPERSED ON A CARRIER IN THE PRESENCE OF AQUEOUS ALKALI METAL HYDROXIDE INTRODUCED DIRECTLY INTO SAID BED OF CATALYST.
Claim 2
Independent Claim
95 words
A METHOD OF SWEETENING PETROLEUM DISTILLATES WHICH COMPRISES MIXING A PETROLEUM DISTILLATE CONTAINING MERCAPTANS WITH AN AMOUNT OF ELEMENTAL SULFUR AT LEAST SUBSTANTIALLY STOICHIOMETRICALLY EQUIVALENT TO THE MERCAPTAN CONTENT OF SAID DISTILLATE AND NOT GREATER THAN ABOUT 2 TIMES SAID STOICHIOMETRICALLY EQUIVALENT AMOUNT AND FREE OXYGEN-CONTAINING GAS, CONTACTING SAID MIXTURE OF DISTILATE, ELEMENTAL SULFUR AND AIR WITH A BED OF SOLID CATALYST COMPRISING LEAD COMPOUNDS SELECTED FROM THE CLASS CONSISTING OF LEAD SULFIDE AND LEAD OXIDE DISPERSED ON A CARRIER IN THE PRESENCE OF AQUEOUS ALKALI METAL HYDROXIDE INTRODUCED DIRECTLY INTO SAID BED OF CATALYST.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-23 | 1962-09-22 | 1963-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-23 | 1966-09-22 | 1967-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-23 | 1970-09-22 | 1971-03-24 | $7700.00 | Window Closed / Lapsed |