US3668249A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cyclic hydrocarboxylation process for production of straight-chain acids, anhydrides or esters
Assignee: Union Oil Company of California
•
Filing: 1969-06-10
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Granted: 1972-06-06
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Expires: 1989-06-10
Abstract
Abstract A process for preparation of straight-chain acids, anhydrides or esters, comprising contacting an ethylenically unsaturated hydrocarbon, carbon monoxide and water, a carboxylic acid or an alcohol at specified temperatures with a group VIII noble metal catalyst, separating the straight-chain product and recycling the branched-chain product to the reaction medium.
Inventors
- 👤 Donald M Fenton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:32
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/54; C07C51/56; C07C51/10; C07C51/14; C07C67/00; C07C67/36; C07C67/38; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/582
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
20 words
The process of claim 1 wherein the biphyllic ligand is a triarylphosphine whose aryl groups have six to 10 carbons.
Claim 2
Dependent Claim
15 words
The process of claim 2 wherein the branched-chain product is recycled to the reaction medium.
Claim 3
Dependent Claim
20 words
The process of claim 2 wherein the ethylenically unsaturated hydrocarbon is an alpha olefin having two to about 18 carbons.
Claim 4
Dependent Claim
19 words
The process of claim 2 wherein the hydrocarboxylation is conducted in a hydrogen pressure of 1 to 30 atmospheres.
Claim 5
Dependent Claim
23 words
The process of claim 2 wherein said hydrocarbon and carbon monoxide are reacted with a fatty acid having two to about 18 carbons.
Claim 6
Dependent Claim
44 words
The process of claim 6 wherein said ethylenically unsaturated hydrocarbon is an alpha olefin having two to about eight carbons, wherein said biphyllic ligand is triphenylphosphine, said temperature is 140* to 200* C. and the separated branched-chain anhydride is recycled to said reaction medium.
Claim 7
Dependent Claim
22 words
The process of claim 7 wherein said olefin is propylene, said acid is acetic acid and said temperature is about 150* C.
References Cited (Backward Citations)
US3437676A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-06 | 1975-12-06 | 1976-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-06 | 1979-12-06 | 1980-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-06 | 1983-12-06 | 1984-06-06 | $7700.00 | Window Closed / Lapsed |