Grillo-werke Ag

Joachim Van De Flierdt

Klaus Driemel

Ingo Biertuempel

Dieter Mm Rohe

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.

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Dinslaken, Germany

Joachim Van De Flierdt