US3907882A
Expired / Lapsed
US
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Method for the oxycarbonylation of ethylene and propylene
Assignee: Roehm GmbH Darmstadt
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Filing: 1974-03-29
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Granted: 1975-09-23
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Expires: 1994-03-29
Abstract
Abstract An improved method for the oxycarbonylation of ethylene and propylene to form Alpha , Beta -unsaturated carboxylic acids, which method employs a catalyst consisting essentially of a rhenium compound and, as a co-catalyst, at least one member selected from the group consisting of compounds of metals of the second and third main groups of the Periodic System, compounds of metals and the fourth, fifth, and sixth sub-groups of the Periodic System, and compounds of manganese, iron, and copper.
Inventors
- 👤 Wolfgang Gaenzler
- 👤 Klaus Kabs
- 👤 Guenter Schroeder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:07
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/10; C07C51/145; B; B01; B01J; B01J23/00; B01J23/16; B01J23/32; B01J23/36; B01J23/70; B01J23/76; B01J23/84; B01J23/889; B01J23/8896; C07C51/14
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
35 words
A method as in claim 1 wherein said co-catalyst is a compound of a metal selected from the group consisting of magnesium, calcium, aluminum, gallium, titanium, hafnium, vanadium, tantalum, chromium, tungsten, manganese, copper, and iron.
Claim 2
Dependent Claim
16 words
A method as in claim 1 wherein said co-catalyst is a compound of a multivalent metal.
Claim 3
Dependent Claim
13 words
A method as in claim 1 wherein said co-catalyst is an aluminum compound.
Claim 4
Dependent Claim
20 words
A method as in claim 1 wherein said catalyst consists essentially of a rhenium (V) salt and an aluminum compound.
Claim 5
Dependent Claim
14 words
A method as in claim 1 wHerein an alkali metal carboxylate is additionally present.
Claim 6
Dependent Claim
17 words
A method as in claim 6 wherein said alkali carboxylate is a carboxylate of sodium or lithium.
Claim 7
Dependent Claim
13 words
A method as in claim 1 wherein ethylene is converted to acrylic acid.
References Cited (Backward Citations)
US2739169A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-22 | 1979-03-24 | 1979-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-22 | 1983-03-24 | 1983-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-22 | 1987-03-24 | 1987-09-23 | $7700.00 | Window Closed / Lapsed |