Patent US3037049A successfully refreshed from Google Patents.
US3037049A
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Process for esterifying benzene dicarboxylic acids
Assignee: Olin Corp
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Filing: 1960-01-28
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Granted: 1962-05-29
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Expires: 1980-01-28
Abstract
No abstract record available.
Inventors
- 👤 Alexander A Vaitekunas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:10
CPC Classifications
C; C07; C07C; C07C69/00; C07C69/76; C07C69/80; C07C69/82; C07C67/00; C07C67/24; C07C67/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
IN THE ESTERIFICATION OF A BENZENE DICARBOXYLIC ACID WITH AN ALKYLENE OXIDE HAVING TWO TO SIX CARBON ATOMS, THE PROCESS COMPRISING SUSPENDING THE ACID IN ABOUT 2 TO 6 TIMES ITS WEIGHT OF AN INERT ORGANIC LIQUID MEDIUM CHOSEN FROM THE GROUP CONSISTING OF KETONES, ETHERS AND ALKYLBENZENES, SAID LIQUID BEING A NON-SOLVENT FOR SAID ACID AND HAVING A NORMAL BOILING POINT NOT HIGHER THAN ABOUT 150*C. AND NOT LOWER THAN ABOUT 50*C., PROVIDING IN SAID SUSPENSION 1.7 TO 2.1 MOLES OF SAID ALKYLENE OXIDE PER MOLE OF SAID ACID AND A TERTIARY AMINE CATALYST AMOUNT TO ABOUT 0.5 TO 5% BY WEIGHT OF SAID ACID, SAID AMINE FORMING A SALT WITH SAID ACID WHICH IS SOLUBLE IN THE ORGANIC MEDIUM, AND STIRRING SAID SUSPENSION AT A TEMPERATURE OF 80* TO 145*C. FOR ABOUT 1 TO 3 HOURS UNDER INERT GAS PRESSURE SUFFICIENT TO MAINTAIN SAID MEDIUM IN THE LIQUID PHASE.
Claim 2
Dependent Claim
151 words
IN THE ESTERIFICATION OF A BENZENE DICARBOXYLIC ACID WITH AN ALKYLENE OXIDE HAVING TWO TO SIX CARBON ATOMS, THE PROCESS COMPRISING SUSPENDING THE ACID IN ABOUT 2 TO 6 TIMES ITS WEIGHT OF AN INERT ORGANIC LIQUID MEDIUM CHOSEN FROM THE GROUP CONSISTING OF KETONES, ETHERS AND ALKYLBENZENES, SAID LIQUID BEING A NON-SOLVENT FOR SAID ACID AND HAVING A NORMAL BOILING POINT NOT HIGHER THAN ABOUT 150*C. AND NOT LOWER THAN ABOUT 50*C., PROVIDING IN SAID SUSPENSION 1.7 TO 2.1 MOLES OF SAID ALKYLENE OXIDE PER MOLE OF SAID ACID AND A TERTIARY AMINE CATALYST AMOUNT TO ABOUT 0.5 TO 5% BY WEIGHT OF SAID ACID, SAID AMINE FORMING A SALT WITH SAID ACID WHICH IS SOLUBLE IN THE ORGANIC MEDIUM, AND STIRRING SAID SUSPENSION AT A TEMPERATURE OF 80* TO 145*C. FOR ABOUT 1 TO 3 HOURS UNDER INERT GAS PRESSURE SUFFICIENT TO MAINTAIN SAID MEDIUM IN THE LIQUID PHASE.
References Cited (Backward Citations)
US2862957A
Cited
US2932662A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-05-28 | 1965-11-27 | 1966-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-28 | 1969-11-27 | 1970-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-28 | 1973-11-27 | 1974-05-29 | $7700.00 | Window Closed / Lapsed |