US2837566A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for recovery of organic acids
Assignee: Millennium Petrochemicals Inc
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Filing: 1956-10-19
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Granted: 1958-06-03
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Expires: 1976-10-19
Abstract
No abstract record available.
Inventors
- 👤 Feldman Julian
- 👤 Orville D Frampton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:39
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/42; C07C51/48
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
IN A PROCESS FOR PRODUCTION OF TOLUENE-SOLUBLE ORGANIC ACIDS BY SELECTIVELY REACTING AN ALIPHATIC CONJUGATED DIOLEFIN WITH AN ALKALI METAL TO FORM A MIXTURE COMPRISING DIALKALI METAL DERIVATIVES OF DIMERS OF THE DIOLEFIN, CARBONATING SAID MIXTURE TO FORM A MIXTURE COMPRISING DIALKALI METAL SALTS OF ORGANIC ACIDS HAVING TWO MORE CARBON ATOMS/MOLECULE THAN SAID DIOLEFIN DIMER AND CONVERSION OF SAID MIXTURE OF SALTS BY HYDROGENATION AND ACIDIFICATION TO A MIXTURE OF TOLUENE-SOLUBLE WATER-INSOLUBLE ORGANIC ACIDS AND TOLUENE-SOLUBLE WATER-SOLUBLE ORGANIC ACIDS, THE IMPROVEMENT PROVIDING FOR OBTAINMENT OF INCREASED YIELD OF TOLUENE-SLUBLE ORGANIC ACIDS WHICH COMPROSES SUBJECTING THE TOLUENE-SOLUBLE ORGANIC ACIDS WHICH ORGANIC ACID COMPONENTS, SEPARATED FROM THEIR MIXTURE WITH TOLUENE-SOLUBLE WATER-INSOLUBLE ORGANIC ACIDS, TO AN ELEVATED TEMPERATURE UP TO ABOUT 250*C. FOR A PERIOD OF TIME SUFFICIENT TO CONVERT A SUBSTANTIAL PORTION OF SAID TOLUENE-INSOLUBLE ORGANIC ACIDS TO TOLUENE-SOLUBLE ORGANIC ACIDS.
Claim 2
Dependent Claim
140 words
IN A PROCESS FOR PRODUCTION OF TOLUENE-SOLUBLE ORGANIC ACIDS BY SELECTIVELY REACTING AN ALIPHATIC CONJUGATED DIOLEFIN WITH AN ALKALI METAL TO FORM A MIXTURE COMPRISING DIALKALI METAL DERIVATIVES OF DIMERS OF THE DIOLEFIN, CARBONATING SAID MIXTURE TO FORM A MIXTURE COMPRISING DIALKALI METAL SALTS OF ORGANIC ACIDS HAVING TWO MORE CARBON ATOMS/MOLECULE THAN SAID DIOLEFIN DIMER AND CONVERSION OF SAID MIXTURE OF SALTS BY HYDROGENATION AND ACIDIFICATION TO A MIXTURE OF TOLUENE-SOLUBLE WATER-INSOLUBLE ORGANIC ACIDS AND TOLUENE-SOLUBLE WATER-SOLUBLE ORGANIC ACIDS, THE IMPROVEMENT PROVIDING FOR OBTAINMENT OF INCREASED YIELD OF TOLUENE-SLUBLE ORGANIC ACIDS WHICH COMPROSES SUBJECTING THE TOLUENE-SOLUBLE ORGANIC ACIDS WHICH ORGANIC ACID COMPONENTS, SEPARATED FROM THEIR MIXTURE WITH TOLUENE-SOLUBLE WATER-INSOLUBLE ORGANIC ACIDS, TO AN ELEVATED TEMPERATURE UP TO ABOUT 250*C. FOR A PERIOD OF TIME SUFFICIENT TO CONVERT A SUBSTANTIAL PORTION OF SAID TOLUENE-INSOLUBLE ORGANIC ACIDS TO TOLUENE-SOLUBLE ORGANIC ACIDS.
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) | 1961-06-02 | 1961-12-02 | 1962-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-02 | 1965-12-02 | 1966-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-02 | 1969-12-02 | 1970-06-03 | $7700.00 | Window Closed / Lapsed |