METHOD OF PRODUCING DIMETHYL SULPHOXIDE Russian patent published in 2011 - IPC C07C315/02 

FIELD: chemistry.

SUBSTANCE: method of producing dimethyl sulphoxide is realised through oxidation of dimethyl sulphide with atmospheric oxygen while heating at high pressure in a medium of acetone in the presence of a copper compound based catalyst. Oxidation is carried out without adding acid to the reaction mixture and non-halide containing catalysts such as copper- acetate, para-cresylate, naphtholate, para-aminophenolate are used. The process is carried out in conditions where conversion of dimethyl sulphide does not exceed 80%.

EFFECT: prevention of corrosion of the apparatus, avoiding formation dimethyl sulphone by-product, high output of dimethyl sulphoxide, which can be used as a solvent, complexing agent, extraction agent and medicinal agent.

3 cl, 1 tbl, 15 ex