US4280966A
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Process for the preparation of alkanesulfonyl chlorides
Assignee: Merck Patent GmbH
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Filing: 1979-10-19
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Granted: 1981-07-28
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Expires: 1999-10-19
Abstract
Abstract A process is provided for preparing alkanesulfonyl chlorides having 1-12 carbon atoms, in which the reaction of the corresponding alkanethiols and/or dialkyl disulfides with chlorine and water at a temperature of between -10® and +50° C. is carried out in the desired alkanesulfonyl chloride as the reaction medium. The reaction can be carried out batchwise or continuously in a circulatory reactor, mixing of the reactants being effected by the hydrogen chloride formed in the reaction.
Inventors
- 👤 Fritz Hubenett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:27
CPC Classifications
B; B01; B01J; B01J10/00; C; C07; C07C; C07C309/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
62 words
In a process for preparing an alkanesulfonyl chloride having 1-12 carbon atoms by reacting at least one of the corresponding alkanethiol and dialkyl disulfide with chlorine and water at a temperature of from -10 to +50° C.; the improvement which comprises using said alkanesulfonyl chloride as the reaction medium and effecting the reaction with not more than the stoichiometric amount of water.
Claim 2
Dependent Claim
62 words
In a process for preparing an alkanesulfonyl chloride having 1-12 carbon atoms by reacting at least one of the corresponding alkanethiol and dialkyl disulfide with chlorine and water at a temperature of from -10 to +50° C.; the improvement which comprises using said alkanesulfonyl chloride as the reaction medium and effecting the reaction with not more than the stoichiometric amount of water.
Claim 3
Dependent Claim
30 words
The process of claim 1 wherein the reaction is carried out continuously in a circulatory reactor, mixing of the reactants being effected by the hydrogen chloride formed in the reaction.
Claim 4
Dependent Claim
15 words
The process of claim 1, wherein the reaction temperature is from 25° to 35° C.
Claim 5
Dependent Claim
32 words
The process of claim 1, wherein the reaction is effected with an excess of chlorine over the stoichiometric amount, said excess being from 0.1 to 5 percent more than the stoichiometric amount.
Claim 6
Dependent Claim
37 words
The process of claim 1, wherein dimethyl disulfide is reacted to form methanesulfonyl chloride in a continuous process effected in a circulatory reactor, mixing of the reactants being effected by the hydrogen chloride formed in the reaction.
Claim 7
Dependent Claim
15 words
The process of claim 5, wherein the reaction temperature is from 25° to 35° C.
Claim 8
Dependent Claim
32 words
The process of claim 6, wherein the reaction is effected with an excess of chlorine over the stoichiometric amount, said excess being from 0.1 to 5 percent more than the stoichiometric amount.
Claim 9
Dependent Claim
25 words
The process of claim 1, wherein the hydrogen chloride produced in the reaction is absorbed in water and recovered as an aqueous hydrochloric acid solution.
Claim 10
Dependent Claim
14 words
The process of claim 1, wherein dimethyl disulfide is reacted to form methanesulfonyl chloride.
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) | 1984-07-27 | 1985-01-26 | 1985-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-27 | 1989-01-26 | 1989-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-27 | 1993-01-26 | 1993-07-28 | $7700.00 | Window Closed / Lapsed |