Enichem Augusta S.p.a.

Giuseppe La Torre

Cosimo Franco

Luciano Cavalli

Artemio Gellera

Onorio Gallistru

Camilla Maraschin

The invention is concerned with an improved process for preparing paraffin-sulfonic acids containing from 10 to 20 carbon atoms, as well as their salts. The process comprises the initial reaction of sulfo-oxidation of the concerned mixture of n-paraffins, the removal of unreacted n-paraffins from the reaction mixture, the removal of the excess of SO.sub.2 from said mixture, and the removal from the reaction mixture of the therein formed sulfuric acid, with the simultaneous recovery of the end product. After the removal of SO.sub.2, to the reaction mixture hydrogen peroxide is added and the so obtained solution is submitted to one treatment selected from among the following treatments:

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Milan, Italy

Giuseppe La Torre