US4006065A
Expired / Lapsed
US
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Process for the synthesis of pure isomers of long chain alkenes
Assignee: Individual
•
Filing: 1975-09-22
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Granted: 1977-02-01
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Expires: 1995-09-22
Abstract
Abstract Long chain alkenes are produced by electrolyzing an organic solution containing a mixture of short chain carboxylic acid and a larger chain carboxylic acid, one of which is unsaturated. Many of the products so formed are useful as insect attractants.
Inventors
- 👤 Otto Meresz
- 👤 Cecilia Mozsgai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:38
CPC Classifications
C; C25; C25B; C25B3/00; C25B3/20; C25B3/29; C25B3/01; C25B3/03
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
79 words
A process for preparing long chain olefinic compounds which includes electrolysing in the liquid phase a mixture comprising a short chain carboxylic acid and a longer chain carboxylic acid, at least one of which acids has unsaturation, in solution in organic solvent which comprises a mixture of a first organic solvent capable of maintaining carboxylate ions in solution and thus becoming conducting, and a second organic solution which is nonconducting, and recovering the long chain olefinic compounds so formed
Claim 2
Dependent Claim
79 words
A process for preparing long chain olefinic compounds which includes electrolysing in the liquid phase a mixture comprising a short chain carboxylic acid and a longer chain carboxylic acid, at least one of which acids has unsaturation, in solution in organic solvent which comprises a mixture of a first organic solvent capable of maintaining carboxylate ions in solution and thus becoming conducting, and a second organic solution which is nonconducting, and recovering the long chain olefinic compounds so formed
Claim 3
Dependent Claim
46 words
The process of claim 1 which is catalyzed by the presence in the solution of a catalytic amount of a base selected from the group consisting of compounds of alkali metals and compounds of alkaline earth metals, which product carboxylate ions solouble in organic solvent medium.
Claim 4
Dependent Claim
27 words
The process of claim 2 wherein the short chain carboxylic acid is used in a 2-5 fold molar excess with respect to the longer chain carboxylic acid.
Claim 5
Dependent Claim
31 words
The process of claim 3 wherein the longer chain carboxylic acid is a C 7 -C 23 naturally occurring acid having internal monounsaturation, and the short chain carboxylic acid is saturated.
Claim 6
Dependent Claim
30 words
The process of claim 4 wherein erucic acid and propionic acid are electrolysed in admixture in the presence of sodium ions, and a mixture of cis-9-tricosene and cis-9-heneicosene is recovered.
Claim 7
Dependent Claim
25 words
The process of claim 5 wherein the organic solvent mixture in which the electrolysis is conducted is a mixture of methyl alcohol and petroleum ether.
Claim 8
Dependent Claim
52 words
The process of claim 1 wherein the first organic solvent of the solvent mixture is selected from the group consisting of methyl alcohol, ethyl alcohol, cellosolves, ethylene glycol dimethyl ether and pyridine, and the second organic solvent is selected from the group consisting of petroleum ether, cyclohexane, hexane and non-aromatic hydrocarbon liquids.
References Cited (Backward Citations)
DE863042C
Cited
US2760926A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-02-01 | 1980-08-02 | 1981-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-01 | 1984-08-02 | 1985-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-01 | 1988-08-02 | 1989-02-01 | $7700.00 | Window Closed / Lapsed |