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US3661739A
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US
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Method of electrochemical hydrodimerization of olefinic compounds
Assignee: Individual
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Filing: 1969-09-29
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Granted: 1972-05-09
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Expires: 1989-09-29
Abstract
Abstract A method of electrochemical dimerization of olefinic compounds of the general formula CH2=CHX, wherein X is a nitrile, ester, amide, aldehyde or carboxy group, according to which a mixture consisting of an aqueous solution of acid salts of an alkali metal and polybasic acid and olefine is subjected to electrolysis in an electrolytic cell provided with an oxide anode and with a cathode made of graphite impregnated with ion-exchange polymers that are insoluble in the reaction mixture and contain a tetraalkylammonium group or a substituted tetraalkylammonium group, the electrolysis being effected at a cathode current density of 300-1,600 A/m2, a pH of 7-9, and at a temperature of 17*-25* C.
Inventors
- 👤 Andrei Petrovich Tomilov
- 👤 Vladimir Alexeevich Klimov
- 👤 Semen Lvovich Varshavsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:22
CPC Classifications
C; C25; C25B; C25B11/00; C25B11/04; C25B11/042; C25B11/043; C25B11/044; C25B3/00; C25B3/20; C25B3/29; C25B3/295; C25B3/01; C25B3/09
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
61 words
A method as claimed in claim 1 wherein said ion-exchange polymer is incorporated into the cathode by impregnating graphite with a solution of a monomer selected from the group consisting of styrene, divinylbenzene, vinylnaphthalene and acenaphthylene in the presence of a polymerization initiator, followed by polymerizing said monomer at an elevated temperature and converting the resulting polymers to an ion-exchange form.
Claim 2
Dependent Claim
79 words
A method as claimed in claim 2 wherein the polymer conversion to ion-exchange form is effected by treating the polymer with a mixture of chloromethyl ether and stannic chloride taken in a weight ratio of from 20:1 to 40:1 for a period of 40 to 80 hours, following by washing, drying at a temperature of from 40* to 70* C., treating with triethylamine at a temperature of from 60* to 85* C. and thereafter treating with an alkaline solution.
Claim 3
Dependent Claim
48 words
A method as claimed in claim 2 wherein the polymer conversion to ion-exchange form is effected by treating the polymer with a 40-60 percent solution of chlorosulfonic acid and dichloroethane, followed by hydrolyzing the resulting chlorosulfonate with water and treating with a 5-15 percent solution of tetraalkylammonium hydroxide.
Claim 4
Dependent Claim
86 words
A method as claimed in claim 1 wherein the incorporating of said ion-exchange polymer into the pores in the graphite is effected by impregnating the graphite with a solution of a mixture of two monomers selected from the group consisting of styrene, divinylbenzene, vinylnaphthalene, acenaphthylene and butadiene, said two monomers being taken in a weight ratio of from 50:1 to 1:50 and said solution containing a copolymerization initiator, followed by copolymerizing said two monomers at elevated temperature and converting the resulting copolymers to an ion-exchange form.
Claim 5
Dependent Claim
79 words
A method as claimed in claim 5 wherein said copolymers are converted to ion-exchange form by treatment with a mixture of chloromethyl ether and stannic chloride taken in a weight ratio of from 20:1 to 40:1 for a period of from 40 to 60 hours, followed by washing the thus-treated copolymer, drying at a temperature of from 40* to 70*, treating with triethylamine at a temperature of from 60* to 85* C., and thereafter treating with an alkaline solution.
Claim 6
Dependent Claim
43 words
A method as claimed in claim 5 wherein said copolymers are converted to ion-exchange form by treatment with a solution of chlorosulfonic acid in dichloroethane, followed by hydrolyzing the resultant chlorosulfonate with water and treating with a 5-15 percent solution of tetraalkylammonium hydroxide.
Claim 7
Dependent Claim
27 words
A method as claimed in claim 5 wherein the mixture of two monomers comprises styrene and divinylbenzene taken in a weight ratio of from 6:1 to 1:10.
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) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |