Process for the production of compositions comprising hydroperoxides of mono- or polyalkylarylsulfonates of an alkali metal and use of these compositions in the preparation of detergents

Abstract

Abstract 1. Process for the manufacture, in an aqueous medium, of compositions containing hydroperoxides of alkali metal monoalkylarylsulphonates or polyalkylarylsulphonates, characterised in that : a) in a first step, an alkali metal monoalkylarylsulphonate or polyalkylarylsulphonate of the formula : see diagramm : EP0028186,P8,F1 in which : M ist an alkali metal, RH is an alkyl radical, R' is a lower alkyl radical and n =< 4, is treated with oxygen at a temperature below 85 degrees C, at a pH of between 9 and 10.5 and in the presence of 1 to 50 ppm of cobalt ions, relative to the alkali metal monoalkylarylsulphonate or polyalkylarylsulphonate, to form a mixture consisting, by weight, of : - 5 to 65% of unconverted alkali metal monoalkylarylsulphonate or polyalkylarylsulphonate, - 25 to 70% of the corresponding hydroperoxide of the formula : see diagramm : EP0028186,P8,F2 and - 5 to 30% of the corresponding alcohol of the formula : see diagramm : EP0028186,P8,F3 and b) in a second step, the mixture obtained in the first step is brought into contact with hydrogen peroxide, the amount of hydrogen peroxide being between 2 and 15 parts by weight (calculated as 100% strength hydrogen peroxide) per 100 parts by weight of the mixture obtained in the first step, at a pH of between 4 and 10 and at a temperature below 50 degrees C, and the product treated in thin way is then dried at a temperature below 50 degrees C.

Inventors

• 👤 Pierre Couderc
• 👤 Gérard Caux

Bibliographic Details