Patent US3920736A successfully refreshed from Google Patents.
US3920736A
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Method for the preparation of ' ,' -unsaturated carboxylic acids
Assignee: Roehm GmbH Darmstadt
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Filing: 1973-09-24
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Granted: 1975-11-18
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Expires: 1993-09-24
Abstract
Abstract An improved method for the oxycarbonylation of olefins to form Alpha , Beta -unsaturated carboxylic acids, which method employs a catalyst system consisting essentially of certain combinations of compounds of metals of the fourth to seventh sub-groups of the Periodic System with compounds of copper, zinc, cerium, tin, iron, cobalt, and nickel.
Inventors
- 👤 Wolfgang Gaenzler
- 👤 Klaus Kabs
- 👤 Guenter Schroeder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:48
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/10; C07C51/145
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
115 words
IN THE METHOD FOR PREPARING A,B-UNSATURATED CARBOXYLIC ACIDS BY THE OXIDATIVE CARBONYLATION OF ETHYLENE OR PROPYLENE WITH CARBON MONOXIDE AND OXYGEN IN A SUBSTANTIALLY NON-AQUEOUS REACTION MEDIUM IN THE PRESENCE OF A CATALYTIC AMOUNT OF A CATALYST SOLUBLE IN SAID NON-AQUEOUS MEDIUM, THE IMPROVEMENT WHEREIN SAID CATALYST CONSISTS ESSENTIALLY OF A COMPOUND OF A METAL OF THE FOURTH TO SEVENTH SUB-GROUPS OF THE PERIODIC SYSTEM HAVING AN ATOMIC WEIGHT BETWEEN 47 AND 185, AND A COMPOUND OF COPPER, ZINC, CERIUM, TIN, IRON, COBALT, OR NICKEL, SAID CATALYST FURTHER ESSENTIALLY CONTAINING A HALIDE, EITHER OF A SAID CATALYTIC METAL, OF A NON-CATALYTIC MTAL, OR OF A MIXTURE OF A SAID CATALYTIC METAL AND A NON-CATALYTIC METAL.
Claim 2
Dependent Claim
115 words
IN THE METHOD FOR PREPARING A,B-UNSATURATED CARBOXYLIC ACIDS BY THE OXIDATIVE CARBONYLATION OF ETHYLENE OR PROPYLENE WITH CARBON MONOXIDE AND OXYGEN IN A SUBSTANTIALLY NON-AQUEOUS REACTION MEDIUM IN THE PRESENCE OF A CATALYTIC AMOUNT OF A CATALYST SOLUBLE IN SAID NON-AQUEOUS MEDIUM, THE IMPROVEMENT WHEREIN SAID CATALYST CONSISTS ESSENTIALLY OF A COMPOUND OF A METAL OF THE FOURTH TO SEVENTH SUB-GROUPS OF THE PERIODIC SYSTEM HAVING AN ATOMIC WEIGHT BETWEEN 47 AND 185, AND A COMPOUND OF COPPER, ZINC, CERIUM, TIN, IRON, COBALT, OR NICKEL, SAID CATALYST FURTHER ESSENTIALLY CONTAINING A HALIDE, EITHER OF A SAID CATALYTIC METAL, OF A NON-CATALYTIC MTAL, OR OF A MIXTURE OF A SAID CATALYTIC METAL AND A NON-CATALYTIC METAL.
Claim 3
Dependent Claim
17 words
A method as in claim 1 wherein the reaction is performed under a pressure above atmospheric pressure.
Claim 4
Dependent Claim
15 words
A method as in claim 1 wherein the reaction is performed at an elevated temperature.
Claim 5
Dependent Claim
20 words
A method as in claim 1 wherein the reaction is performed at a temperature between about 80*C. and about 200*C.
Claim 6
Dependent Claim
32 words
A method as in claim 1 wherein the reaction is performed under a pressure between about 80 atmospheres and about 120 atmospheres and at a temperature between about 100*C. and about 150*C.
Claim 7
Dependent Claim
20 words
A method as in claim 1 wherein said olefin is ethylene and said catalyst consists essentially of manganese-III-acetate and copper-II-chloride.
References Cited (Backward Citations)
US2593440A
Cited
US3739169A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-17 | 1979-05-19 | 1979-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-17 | 1983-05-19 | 1983-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-17 | 1987-05-19 | 1987-11-18 | $7700.00 | Window Closed / Lapsed |