Process for the preparation of methanesulfonic acid

Details Process for the preparation of methanesulfonic acid Process for the preparation of methanesulfonic acid

1998-10-01

2000-05-09

O'Sullivan, Peter

Organic compounds -- part of the class 532-570 series

Organic compounds

Sulfonic acids or salts thereof

558 39, 562 30, 562118, 562120, 562123, C07C30302

Patent

active

060606215

ABSTRACT:
The process for the preparation of methanesulfonic acid by reacting sulfite ions within an aqueous system with dimethyl sulfate at an elevated temperature and adding a strong acid subsequently, wherein the molar ratio of sulfite ions to dimethyl sulfate is 1.5 to 2.5:1, preferably 2:1, and the reaction charge is maintained at said elevated temperature for at least 2 h, preferably 4 h.

REFERENCES:
Pantlischko et al., Monatshefte Fur Chemie, zBd. 89, 1958, Seiten 285-287, XP002092953, Seite 287, Zeilen 1-3, 12-26.
P.K. Dutt, J. Chem. Soc., 125 1924, pp. 1463-1465, XP002092954.
Database Chemabs Chemical Abstracts Services, Columbus, Ohio, Accession No. 77:33931, SP002092955.
Katschurin, Erfindungsbeschreibung, 335240.
Lober et al., Sulfonsauren, pp. 567-550.

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