PATENTS

      1577.  ------.  [I. G. FARBENINDUSTRIE, A. G.]  [Sulfo-Oxidation.]  French Patent 52,826.  Aug. 10, 1945: appl. filed Apr. 8. 1943.  French Patent 53,324. Oct. 16. 1945: appl. filed Jan. 27. 1944.  French Patent 53,821. Sept. 9, 1946: appl. filed July 18. 1944.  Chem. Zentralb., 1949. No. 1. p. E 14.

            Sulfo-oxidation of aliphatic or cycloaliphatic hydrocarbons, such as the products of CO hydrogenation that are free from olefins and aromatics, with a mixture of So₂ and O₂ or air, is catalyzed by radiation with photoactive light.  The reaction is promoted and a more pure product is obtained in the presence of anhydrides or chlorides of some lower aliphatic acids or ketenes such as the anhydrides of acetic or propionic acids.

            See also French Patent 877,672 (abs. 1578).