Patent US2646390A successfully refreshed from Google Patents.
US2646390A
Expired / Lapsed
US
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Desulfurization of distillate fuels
Assignee: Standard Oil Co
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Filing: 1950-12-16
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Granted: 1953-07-21
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Expires: 1970-12-16
Abstract
No abstract record available.
Inventors
- 👤 Robert C Arnold
- 👤 Arthur P Lien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:32
CPC Classifications
C; C10; C10G; C10G21/00; C10G21/06; C10G21/08; C10G21/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
A PROCESS FOR REFINING A HIGH-SULFUR VIRGIN PETROLEUM DISTILLATE FUEL, WHICH PROCESS COMPRISES CONTACTING SAID DISTILLATE, AT A TEMPERATURE OF BETWEEN ABOUT -20* AND ABOUT -40* C., WITH BETWEEN ABOUT 0.5 AND 3 GRAM MOLS OF SUBSTANTIALLY ANHYDROUS ALUMINUM CHLORIDE PER GRAM ATOM OF SULFUR IN SAID DISTILLATE IN THE PRESENCE OF AT LEAST SUFFICIENT LIQUID SULFUR DIOXIDE TO FORM DISTINCT RAFFINATE AND EXTRACT PHASES, SEPARATING SAID PHASES AND RECOVERING FROM SAID RAFFINATE PHASE A PRODUCT OIL CHARACTERIZED BY A SULFUR CONTENT LOWER THAN THAT OF SAID DISTILLATE, A SAYBOLT COLOR NOT MORE THAN ABOUT THAT OF SAID DISTILLATE, AND IMPROVED BURNING QUALITY.
Claim 2
Dependent Claim
103 words
A PROCESS FOR REFINING A HIGH-SULFUR VIRGIN PETROLEUM DISTILLATE FUEL, WHICH PROCESS COMPRISES CONTACTING SAID DISTILLATE, AT A TEMPERATURE OF BETWEEN ABOUT -20* AND ABOUT -40* C., WITH BETWEEN ABOUT 0.5 AND 3 GRAM MOLS OF SUBSTANTIALLY ANHYDROUS ALUMINUM CHLORIDE PER GRAM ATOM OF SULFUR IN SAID DISTILLATE IN THE PRESENCE OF AT LEAST SUFFICIENT LIQUID SULFUR DIOXIDE TO FORM DISTINCT RAFFINATE AND EXTRACT PHASES, SEPARATING SAID PHASES AND RECOVERING FROM SAID RAFFINATE PHASE A PRODUCT OIL CHARACTERIZED BY A SULFUR CONTENT LOWER THAN THAT OF SAID DISTILLATE, A SAYBOLT COLOR NOT MORE THAN ABOUT THAT OF SAID DISTILLATE, AND IMPROVED BURNING QUALITY.
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) | 1956-07-20 | 1957-01-19 | 1957-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-20 | 1961-01-19 | 1961-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-20 | 1965-01-19 | 1965-07-21 | $7700.00 | Window Closed / Lapsed |