Patent US1706749A successfully refreshed from Google Patents.
US4138580A
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Process for preparing diesters of dicarboxylic acids
Assignee: Ube Corp
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Filing: 1977-09-29
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Granted: 1979-02-06
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Expires: 1997-09-29
Abstract
Abstract A process for preparing a diester of a dicarboxylic acid having two more carbon atoms than the unsaturated hydrocarbon used as a starting material, which comprises subjecting an unsaturated hydrocarbon, carbon monoxide and an alcohol to reaction in the presence of a platinum group metal in combination with one or more compounds selected from the group consisting of nitric acid, a nitrogen oxide and an ester of nitrous acid.
Inventors
- 👤 Sumio Umemura
- 👤 Kanenobu Matsui
- 👤 Yoshinari Ikeda
- 👤 Katsuro Masunaga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:04
CPC Classifications
C; C07; C07C; C07C67/00; C07C67/36; C07C67/38; C07C2601/00; C07C2601/12; C07C2601/14
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
128 words
A process for preparing a diester of a dicarboxylic acid having two more carbon atoms than the unsaturated hydrocarbon used as the starting material, which comprises subjecting an unsaturated hydrocarbon, carbon monoxide and an alcohol to reaction in the presence of a platinum group metal in combination with one or more compounds selected from the group consisting of nitric acid, a nitrogen oxide and an ester of nitrous acid, the amount of said nitric acid being from 0.0001 to 10 moles per liter of the reaction medium, the amount of said nitrogen oxide being from 0.1 to 100 mole % of the amount of the unsaturated hydrocarbon, and the amount of said ester of nitrous acid being from 0.0001 to 10 moles per liter of the reaction medium.
Claim 2
Dependent Claim
128 words
A process for preparing a diester of a dicarboxylic acid having two more carbon atoms than the unsaturated hydrocarbon used as the starting material, which comprises subjecting an unsaturated hydrocarbon, carbon monoxide and an alcohol to reaction in the presence of a platinum group metal in combination with one or more compounds selected from the group consisting of nitric acid, a nitrogen oxide and an ester of nitrous acid, the amount of said nitric acid being from 0.0001 to 10 moles per liter of the reaction medium, the amount of said nitrogen oxide being from 0.1 to 100 mole % of the amount of the unsaturated hydrocarbon, and the amount of said ester of nitrous acid being from 0.0001 to 10 moles per liter of the reaction medium.
Claim 3
Dependent Claim
20 words
The process as claimed in claim 1, in which said reaction is carried out in the presence of molecular oxygen.
Claim 4
Dependent Claim
18 words
The process as claimed in claim 1, in which said platinum group metal is supported on a carrier.
Claim 5
Dependent Claim
15 words
The process as claimed in claim 1, in which said platinum group metal is palladium.
Claim 6
Dependent Claim
25 words
The process as claimed in claim 1, in which said unsaturated hydrocarbon is an aliphatic or alicyclic hydrocarbon having from 2 to 20 carbon atoms.
Claim 7
Dependent Claim
14 words
The process as claimed in claim 5, in which said unsaturated hydrocarbon is cyclohexene.
Claim 8
Dependent Claim
21 words
The process as claimed in claim 1, in which said unsaturated hydrocarbon is ethylene, propylene, acetylene or an alkyl derivative thereof.
Claim 9
Dependent Claim
14 words
The process as claimed in claim 1, in which said unsaturated hydrocarbon is styrene.
Claim 10
Dependent Claim
29 words
The process as claimed in claim 1, in which said platinum group metal is used in an amount of from 0.00001 to 10% by weight of the reaction medium.
Claim 11
Dependent Claim
29 words
The process as claimed in claim 9, in which said platinum group metal is used in an amount of from 0.0001 to 1.0% by weight of the reaction medium.
Claim 12
Dependent Claim
24 words
The process as claimed in claim 1, in which said reaction is carried out at a temperature of between room temperature and 250° C.
Claim 13
Dependent Claim
23 words
The process as claimed in claim 11, in which said reaction is carried out at a temperature of between 50° and 150° C.
Claim 14
Dependent Claim
24 words
The process as claimed in claim 1, in which said reaction is carried out under a pressure of between atmospheric pressure and 300 atm.
Claim 15
Dependent Claim
23 words
The process as claimed in claim 12, in which said reaction is carried out under a pressure of between 10 and 200 atm.
Claim 16
Dependent Claim
22 words
The process as claimed in claim 1, in which said carbon monoxide and unsaturated hydrocarbon are used in a molar ratio 0.002-50.
Claim 17
Dependent Claim
23 words
The process as claimed in claim 15, in which said carbon monoxide and unsaturated hydrocarbon are used in a molar ratio of 0.01-5.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-02-05 | 1982-08-07 | 1983-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-05 | 1986-08-07 | 1987-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-05 | 1990-08-07 | 1991-02-06 | $7700.00 | Window Closed / Lapsed |