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Return to Abstracts of Literature 1500-1749
1692. ---------------. [KAWAI, S. AND NOBORI, H.] Manufacture of Fatty Acids by the Oxidation of Paraffin. XVI-XIX. Jour. Soc. Chem. Ind. (Japan), vol. 46, 1943, pp. 636-645; Chem. Abs., vol. 43, 1949, p. 9030.
XVI. Oxidation of tricosane. Tricosane obtained by hydrogenating laurone was oxidized by air at 120° in the presence of Mn soap. The product contained all the fatty acids from hendecanoic acid to arachidic acid with some hydroxy acids. The unsaponifiable portion of the product contained about 20% MeOH soluble material which consisted mostly of alcohols. XVII. Oxidation of hentriacontane. Hentriacontane obtained by the hydrogenation of palmitone was oxidized by air at 110° with Mn soap as catalyst. The fatty acids obtained consisted of all the acids from undecanoic to tricosanoic. The unsaponifiable portion contained about 6% MeOH soluble material consisting of alcohols, carbonyl compounds, etc. The MeOH insoluble fraction was more easily oxidized than triacontane. XVIII. Oxidation of the methanol-insoluble fraction of the unsaponifiable portion. The MeOH insoluble fraction of the unsaponifiable matter obtained on 3 successive oxidations of Fushun shale-oil paraffin described in part XIV (abs. 1691) was oxidized by air at 130°-160° with the addition of 0.1% KMnO4. These fractions were easier to oxidize than the original paraffin. Crude fatty acids containing no hydroxy acids were obtained. XIX. Treatment of raw fatty acid with solvents. Crude fatty acid obtained from the oxidation of Fushun shale-oil paraffin was separated into petroleum ether-insoluble and ether-soluble portions. The soluble portion was further separated into portions insoluble and soluble in 85% alcohol. The petroleum ether-insoluble portion was converted to the Me esters, and 37% was distilled. The distillate was assumed to consist of Me esters of hydroxy acids having similar numbers of C atoms. The 85% alcohol-insoluble portion consisted of higher saturated fatty acids. From the portion soluble in 85% alcohol no lactones, lactides or similar compounds could be obtained by distillation.