Claims
- 1. Process for the preparation of an alkanesulphonic acid from the corresponding dialkyl disulphide, consisting of submitting a C.sub.1 to C.sub.3 alcoholic solution of the dialkyl disulphide, with oxygen, to an irradiation by light rays of wavelength between 200 and 320 nm.
- 2. Process according to claim 1, wherein the alkyl radicals of the dialkyl disulphide are linear or branched alkyl radicals containing from 1 to 16, preferably from 1 to 4 carbon atoms.
- 3. Process according to claim 2, wherein the alkyl radical contains 1 to 4 carbon atoms.
- 4. Process according to claim 1, wherein the dialkyl disulphide content of the starting alcoholic solution is between 0.1 and 90% by weight.
- 5. Process according to claim 4, wherein the dialkyl disulphide content of the starting alcoholic solution is between 1 and 25% by weight.
- 6. Process according to claim 1, wherein the procedure is carried out at a temperature between -20.degree. C. and the boiling point of the alcohol.
- 7. Process according to claim 6, wherein the temperature is between 18.degree. and 45.degree. C.
- 8. Process according to claim 1, wherein the procedure is carried out at atmospheric pressure.
- 9. Method for the synthesis of methanesulphonic acid from dimethyl disulphide comprising the process of claim 1.
- 10. Process according to claim 1, wherein the alcoholic solution is methanol.
- 11. Process for the preparation of alkanesulphonic acid from the corresponding dialkyl disulphide, consisting of submitting a C.sub.1 to C.sub.3 alcoholic solution of the dialkyl disulphide, with oxygen, to an irradiation by light rays of wavelength between 200 and 320 nm; wherein the dialkyl disulphide content of the starting alcoholic solution is between 1 and 25% weight; and wherein the procedure is carried out at a temperature between 18.degree. C. and 45.degree. C., and at atmospheric pressure.
Priority Claims (1)
Number |
Date |
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93 06560 |
Jun 1993 |
FRX |
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Parent Case Info
This is a continuation of application Ser. No. 08/253,021, filed Jun. 2, 1994, now abandoned.
US Referenced Citations (6)
Non-Patent Literature Citations (2)
Entry |
J. Org. Chem. vol. 37, No. 22, 1972, R.W. Murray, et al., "Photosensitised oxidation of dialkly disulphides" p. 3519 Table I. |
Murray et al., "Photosensitized Oxidation of Dialkyl disulfides." J. Org. Chem., vol. 37, No. 22 1972, pp. 3516-3520. |
Continuations (1)
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Number |
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253021 |
Jun 1994 |
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