743. FREE, G. (Badische Anilin und Soda-Fabrik). [Sulfonic Acids or Their Salts From Paraffinic Hydrocarbons.] German Patent 804,571. Apr. 26, 1951; appl. filed Apr. 24, 1949 (Cl. 12 o.) Chem. Zentralb., 1951, II, p. 1679.

Patent Abstracts

743. FREE, G. (Badische Anilin und Soda-Fabrik). [Sulfonic Acids or Their Salts From Paraffinic Hydrocarbons.] German Patent 804,571. Apr. 26, 1951; appl. filed Apr. 24, 1949 (Cl. 12 o.) Chem. Zentralb., 1951, II, p. 1679.

Crude materials such as petroleum, middle oils, or synthetic hydrocarbons are aromatized in the liquid or vaporous state in the presence of catalysts, such as silicates or alumina, capable of being impregnated with metal oxides at about 450º-650º. The reaction products, particularly the middle fractions, are sulfonated and neutralized. Detergents are obtained.

See abs. 2336, 2337, 2660, 2661, 2662, 2663.