US3579537A
Expired / Lapsed
US
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Process for separation of sultones from alkenyl sulfonic acids
Assignee: Colgate Palmolive Co
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Filing: 1966-08-15
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Granted: 1971-05-18
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Expires: 1986-08-15
Abstract
Abstract THE INSTANT PROCESS IS DIRECTED TO SEPARATION OF A SULTONE AND AN ALKENYL SULFONIC ACID FROM A MIXTURE THEREOF PREPARED BY SULFONATION OF AN OLEFIN WITH SO3, WHICH COMPRISES ADDING TO SAID MIXTURE (A) A WATER-SOLUBLE LOWER KETONE WHICH IS A SOLVENT FOR SAID SULTONE AND SAID ACID, AND (B) A BASE WHICH FORMS WITH SAID SULFONIC ACID A WATER SOLUBLE SODIUM, POTASSIUM, LITHIUM OR AMMONIUM SALT INSOLUBLE IN SAID SOLVENT, WHEREBY TO FORM A PRECIPITATE OF SAID SALT AND A SOLUTION OF SAID SULTONE, THE TEMPERATURE AT THE TIME OF FORMATION OF SAID PRECIPITATE BEING AT LEAST ABOUT 15*C.
Inventors
- 👤 Joseph Rubinfeld
- 👤 Henry Leon Levinsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:55
CPC Classifications
C; C07; C07C; C07C303/00; C07C303/02; C07C303/04; C07C303/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-17 | 1974-11-16 | 1975-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-17 | 1978-11-16 | 1979-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-17 | 1982-11-16 | 1983-05-18 | $7700.00 | Window Closed / Lapsed |