US3789057A
Expired / Lapsed
US
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A process for preparing symetrical triorganotin halides
Assignee: Arkema Inc
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Filing: 1971-04-14
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Granted: 1974-01-29
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Expires: 1991-04-14
Abstract
Abstract Novel organotin compounds of the formula RnR''(3 n) SnX are prepared by reacting equimolar amounts of R(n 1)R''3 nSn and a stannic halide in an inert hydrocarbon solvent at temperatures between about -25* and 80* C. R represents a monovalent linear aliphatic hydrocarbon radical containing up to six carbon atoms, R'' represents a monovalent aliphatic or cycloaliphatic hydrocarbon radical containing up to eight carbon atoms, with the proviso that the molecular weight of R'' exceeds that of R by at least 42 except when R'' is a cycloaliphatic hydrocarbon radical. X represents a chlorine or bromine atom and n represents an integer selected from the group consisting of 1 and 2.
Inventors
- 👤 G Reifenberg
- 👤 M Gitlitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:22
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/22; C07F7/2208
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
22 words
The method of claim 1 wherein a solution of the stannic tetrahalide is added to a solution of the tetraorgano tin compound.
Claim 2
Dependent Claim
15 words
The method of claim 1 wherein the stannic halide is stannic chloride or stannic bromide.
Claim 3
Dependent Claim
14 words
The method of claim 2 wherein the solvent for both reactants is a hydrocarbon.
Claim 4
Dependent Claim
13 words
The method of claim 2 wherein the solvent for both reactants is pentane.
Claim 5
Dependent Claim
22 words
The method of claim 2 wherein the temperature is maintained between -25* and 80* C. during the addition of the stannic tetrahalide.
Claim 6
Dependent Claim
20 words
The method of claim 1 wherein an aqueous solution of hydrochloric acid is employed to dissolve the by-product to RSnX3.
References Cited (Backward Citations)
US3475473A
Cited
US3475472A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-28 | 1977-07-30 | 1978-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-28 | 1981-07-30 | 1982-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-28 | 1985-07-30 | 1986-01-29 | $7700.00 | Window Closed / Lapsed |