Evonik Degussa Gmbh

Evonik Operations Gmbh

Evonik Industries Ag

Sebastian Fuss

Harald Jakob

Benjamin Fonfe

Andreas Doerflein

Nadine Duerr

Christoph Weckbecker

Chiu Kee Cheung

Markus Held

Chuanhua He

Frank Wilz

Andreas DÖRFLEIN

Benjamin FonfÉ

Nadine DÜRR

A method for determining dimethyl disulphide proceeds by carrying out a chromatographic separation of an analyte containing at least dimethyl disulphide and methanesulphonic acid, and determining the dimethyl disulphide by pulsed amperometric detection.

Method for determining dimethyl disulphide

The present invention relates to a process for preparing alkanesulphonic acid by oxidizing an alkyl mercaptan, a dialkyl disulphide and/or a dialkyl polysulphide having three to nine sulphur atoms with an oxidizing agent, wherein additional oxidizing agent is fed into the oxidation if as yet unoxidized alkyl mercaptan and/or unoxidized dialkyl disulphide and/or at least one intermediate from the oxidation of the dialkyl disulphide and/or of the dialkyl polysulphide is present in the reaction output, and a corresponding apparatus for performance of oxidation reactions.

Process for preparing an alkanesulphonic acid

The present invention relates to a process for preparing alkanesulfonic acids from dialkyl disulfides with nitric acid and oxygen.

Process for preparing alkanesulfonic acids

The present invention relates to a catalyst which comprises a support material and an oxidic composition containing at least one alkali metal and tungsten, a process for producing such catalysts and also a process for preparing alkyl mercaptans by reaction of alkanols with hydrogen sulphide in the presence of such a catalyst.

Catalyst for the synthesis of alkyl mercaptans and process for producing it

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Flieden, Germany

Sebastian Fuss