US4234740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing diesters of dicarboxylic acids
Assignee: Ube Corp
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Filing: 1978-11-28
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Granted: 1980-11-18
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Expires: 1998-11-28
Abstract
Abstract 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 or a salt thereof; a compound selected from the group consisting of nitric acid, a nitrogen oxide and an ester of nitrous acid; and a halogen compound.
Inventors
- 👤 Sumio Umemura
- 👤 Kanenobu Matsui
- 👤 Yoshinari Ikeda
- 👤 Katsuro Masunaga
- 👤 Takumi Kadota
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:56
CPC Classifications
C; C07; C07C; C07C69/00; C07C69/34
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
150 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 consists essentially of reacting in the liquid phase an unsaturated hydrocarbon, carbon monoxide and an alcohol in the presence of a platinum group metal; a compound selected from the group consisting of nitric acid, a nitrogen oxide, and an ester of nitrous acid used in an amount of from 0.0001 to 10 moles per liter of the reaction medium; and a halogen compound selected from the group consisting of (i) a halide of hydrogen, a platinum group metal, an alkali metal, an alkaline earth metal, cobalt, zinc, copper, iron, chromium, antimony, tin and manganese, and (ii) ammonium chloride, said halogen compound being used in an amount such that the ratio of the halogen atoms to the platinum group metal atoms is not more than 1.
Claim 2
Dependent Claim
150 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 consists essentially of reacting in the liquid phase an unsaturated hydrocarbon, carbon monoxide and an alcohol in the presence of a platinum group metal; a compound selected from the group consisting of nitric acid, a nitrogen oxide, and an ester of nitrous acid used in an amount of from 0.0001 to 10 moles per liter of the reaction medium; and a halogen compound selected from the group consisting of (i) a halide of hydrogen, a platinum group metal, an alkali metal, an alkaline earth metal, cobalt, zinc, copper, iron, chromium, antimony, tin and manganese, and (ii) ammonium chloride, said halogen compound being used in an amount such that the ratio of the halogen atoms to the platinum group metal atoms is not more than 1.
Claim 3
Dependent Claim
20 words
A 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
A process as claimed in claim 1, in which said platinum group metal is carried on a carrier.
Claim 5
Dependent Claim
15 words
A process as claimed in claim 1, in which said platinum group metal is palladium.
Claim 6
Dependent Claim
15 words
A process as claimed in claim 1, in which said nitrogen oxide is nitrogen dioxide.
Claim 7
Dependent Claim
24 words
A process as claimed in claim 1, in which said unsaturated hydrocarbon is an aliphatic or alicyclic hydrocarbon having 2 to 20 carbon atoms.
Claim 8
Dependent Claim
24 words
A process as claimed in claim 6, in which said unsaturated hydrocarbon is ethylene, propylene, isobutene, styrene, cyclohexene acetylene or an alkyl derivative thereof.
Claim 9
Dependent Claim
34 words
A process as claimed in claim 1, in which said platinum group metal is in an amount of from 0.00001 to 10% by weight calculated on the platinum group metal against the reaction medium.
Claim 10
Dependent Claim
34 words
A process as claimed in claim 8, in which said platinum group metal is in an amount of from 0.0001 to 1.0% by weight calculated on the platinum group metal against the reaction medium.
Claim 11
Dependent Claim
36 words
A process as claimed in claim 1, in which said nitric acid, nitrogen oxide or ester of nitrous acid is used in an amount of from 0.001 to 1 mole per liter of the reaction medium.
Claim 12
Dependent Claim
24 words
A 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
A 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
A 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
A process as claimed in claim 13, in which said reaction is carried out under a pressure of between 10 and 200 atm.
Claim 16
Dependent Claim
26 words
A process as claimed in claim 1, in which said carbon monoxide and unsaturated hydrocarbon are used in a molar ratio of from 0.002 to 50.
Claim 17
Dependent Claim
25 words
A process as claimed in claim 15, in which said carbon monoxide and unsaturated hydrocarbon are used in a molar ratio of 0.01 to 5.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-11-18 | 1984-05-19 | 1984-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-18 | 1988-05-19 | 1988-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-18 | 1992-05-19 | 1992-11-18 | $7700.00 | Window Closed / Lapsed |