US3197400A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for removing sulfur from diesel oils
Assignee: Pure Oil Co
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Filing: 1962-07-10
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Granted: 1965-07-27
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Expires: 1982-07-10
Abstract
No abstract record available.
Inventors
- 👤 William L Fierce
- 👤 Allen F Millikan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:18
CPC Classifications
C; C10; C10G; C10G21/00; C10G21/06; C10G21/12; C10G21/20
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
135 words
A METHOD OF TREATING A PETROLEUM FRACTION WHICH CONSISTS IN: (A) CONTACTING A SULFUR-CONTAINING PETROLEUM FRACTION OF THE DIESEL FUEL BOILING RANGE WITH A WATER-SOLUBLE DIALKYL N-SUBSTITUTED ALIPHATIC ACID AMIDE AND AN AQUEOUS SOLUTION OF A STRONG BASE OF 0.7-5.0 N SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL HYDROXIDES, ALKALINE EARTH METAL HYDROXIDES, GUANIDINE, HYDROCARBYL-SUBSTITUTED GUANIDINES, AND QUATERNARY AMMONIUM HYDROXIDES, THE VOLUME OF AMIDE TO AQUEOUS BASE SOLUTION BEING WITHIN THE RANGE OF ABOUT 3:1 TO 15:1 INCLUSIVE, SAID PETROLEUM FRACTION BEING CONTACTED WITH SAID AQUEOUS SOLUTION NO LATER THAN IT IS CONTACTED WITH SAID AMIDE, SAID AMIDE, AQUEOUS SOLUTION, AND STRONG BASE BEING USED IN AMOUNTS TO EFFECT AN INCREASE IN THE CETANE NUMBER OF SAID PETROLEUM FRACTION, AND (B) RECOVERING A RAFFINATE PHASE PREDOMINATING IN A PETROLEUM FRACTION OF IMPROVED CETANE NUMBER.
References Cited (Backward Citations)
US2556837A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-07-26 | 1969-01-25 | 1969-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-26 | 1973-01-25 | 1973-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-26 | 1977-01-25 | 1977-07-27 | $7700.00 | Window Closed / Lapsed |