Return to Abstracts of Literature

Return to Abstracts of Literature 1500-1749

Literature Abstracts

 1556.    ---------------.  [INDUSTRIAL CHEMIST AND CHEMICAL MANUFACTURER.]  Synthetic Fatty Acids.  I.  II.  Vol. 23, 1947, pp. 652-656, 755-763.

        Information in this article is drawn mainly from BIOS final reports 86, PB 18,911; 275, PB 23,808; and 805, PB 49,196, and FIAT reports 407, PB 7,738, and 426, PB 7,745.  The raw materials used by the Germans to produce synthetic fats consisted of Fischer-Tropsch wax, gatsch boiling at 320°-450°, waxes from hydrogenation of brown coal, and even petroleum derivatives of waxy character.  Plants were operated by the Deutsche Fettsäurewerke at Witten-Ruhr, by the I. G. Farbenindustrie at Ludwigshafen-Oppau and Heydebreck, by Hubbe and Fahrenholtz at Magdeburg, and by Ruhrchemie in a 3-ton per month pilot plant at Sterkrade-Holten.  The intake capacity of these plants was approximately 100,000 tons per year, with a rated yield of 75-80% of fatty acids.  The process of Ruhrchemie developed by Velde utilized the harder, long-chain waxes and produced fatty acids of high molecular weight.  The raw wax was heated to 125°, treated with nitrosyl sulfuric acid for 8-12 hr., the acid was separated and the waxy product washed, dried, melted again, kneaded with caustic and, after saponification was complete, extracted with a Fischer-Tropsch motor-gasoline fraction boiling at 80°-100°.  The separated wax was returned to the process, while the soap was treated with dilute H2SO4, washed, and dried.  The material so made was called OP32, and the yield was about 80% on the wax used.  It was yellow to brown in color, hard, and solidified at 80°, its acid No. was 145-150 and its saponification No. 150-155.  The I value was nearly zero.