Grillo-werke Ag

Basf Se Corporation

Ingo Biertuempel

Kerstin Schierle-Arndt

Frieder Borgmeier

Timo Ott

Jan Spielmann

Andreas Kempter

Klaus Driemel

Bjoern Kaibel

Michael Zeilinger

Dieter Mm Rohe

Frank Piepenbreier

Christian Diaz-Urrutia

Joachim Van De Flierdt

Rosario Mazarro Berdonces

Chee Jian Chan

The present invention relates to a process for preparing haloalkanesulfonic acids from sulfur trioxide and a haloalkane, particularly to a process for preparing trifluoromethane sulfonic acid from sulfur trioxide and trifluoromethane.

Process for the preparation of haloalkanesulfonic acids from sulfur trioxide and a haloalkane

The present invention relates to novel uses of stable inorganic peroxoacids as catalysts in the preparation of alkanesulfonic acids from alkanes and sulfur trioxide, methods for the production of alkanesulfonic acids employing said catalysts as well as reaction mixtures comprising said catalysts. The invention particularly relates to the production of methanesulfonic acid from methane and sulfur trioxide employing stable inorganic peroxoacids as catalysts.

Catalysts for the synthesis of alkanesulfonic acids

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.

Process for the preparation of methanesulfonic acid

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Duisburg, Germany

Ingo Biertuempel