Patent US4282165A successfully refreshed from Google Patents.
US4282165A
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Preparation of trimethyltin chloride from dimethyltin dichloride
Assignee: Argus Chemical Corp
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Filing: 1980-03-24
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Granted: 1981-08-04
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Expires: 2000-03-24
Abstract
Abstract A trialkyltin chloride in which the alkyl groups have from about one to six carbon atoms is prepared, without detectable tetraalkyltin, from the corresponding dialkyltin dichloride in one step and in high yield using a catalyst mixture comprising a trihydrocarbylamine or trihydrocarbylphosphine and stannic chloride.
Inventors
- 👤 Koei-Liang Liauw
- 👤 Michael H. Fisch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:46
CPC Classifications
B; B01; B01J; B01J27/00; B01J27/06; B01J27/08; B01J27/10; C; C07; C07F; C07F7/00; C07F7/22; C07F7/2208
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
123 words
In a process for the preparation of a trialkyltin chloride in which the alkyl groups contain from one to six carbon atoms, by heating a mixture containing a dialkyltin dichloride, a polyvalent metal having an electrode potential in the range from -0.14 volt to -1.7 volt, and a polar liquid, the improvement comprising the presence of a catalytic amount of a catalyst consisting essentially of stannic chloride and a compound having the formula R 3 E in which each R is a hydrocarbon group having 1 to 8 carbon atoms and E is a member of the group consisting of nitrogen and phosphorus, in which the molar proportions of stannic chloride to compound R 3 E range from about 1:4 to about 1:1.
Claim 2
Dependent Claim
123 words
In a process for the preparation of a trialkyltin chloride in which the alkyl groups contain from one to six carbon atoms, by heating a mixture containing a dialkyltin dichloride, a polyvalent metal having an electrode potential in the range from -0.14 volt to -1.7 volt, and a polar liquid, the improvement comprising the presence of a catalytic amount of a catalyst consisting essentially of stannic chloride and a compound having the formula R 3 E in which each R is a hydrocarbon group having 1 to 8 carbon atoms and E is a member of the group consisting of nitrogen and phosphorus, in which the molar proportions of stannic chloride to compound R 3 E range from about 1:4 to about 1:1.
Claim 3
Dependent Claim
11 words
A process according to claim 1 in which alkyl is methyl.
Claim 4
Dependent Claim
11 words
A process according to claim 1 in which alkyl is n-butyl.
Claim 5
Dependent Claim
11 words
A process according to claim 1 in which alkyl is n-hexyl.
Claim 6
Dependent Claim
13 words
A process according to claim 1 in which the polyvalent metal is iron.
Claim 7
Dependent Claim
13 words
A process according to claim 1 in which the polyvalent metal is tin.
Claim 8
Dependent Claim
11 words
A process according to claim 1 in which R is phenyl.
Claim 9
Dependent Claim
11 words
A process according to claim 1 in which E is phosphorus.
Claim 10
Dependent Claim
23 words
A process according to claim 1 in which the molar properties of stannic chloride to R 3 E is from 0.9 to 1:1.
Claim 11
Dependent Claim
14 words
A process according to claim 9 wherein R is phenyl and E is phosphorus.
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) | 1984-08-03 | 1985-02-02 | 1985-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-03 | 1989-02-02 | 1989-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-03 | 1993-02-02 | 1993-08-04 | $7700.00 | Window Closed / Lapsed |