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Return to Abstracts of Literature 1500-1749
1678. KATTWINKEL, R. [Determination of Aromatic and Unsaturated Hydrocarbons in benzine by Means of Sulfuric Acid.] Brennstoff-Chem., vol. 8, 1927, pp. 353-358; Chem. Abs., vol. 22, 1928, p. 3039.
Previous methods based on the solvent action of H2SO4 for aromatics and unsaturates are discussed. Kattwinkel determines aromatics+unsaturates in a 10 cc. sample by shaking with 30 cc. of a mixture of 30 gm. P2O5 in 100 cc. H2SO4 (d. 1,840). Unsaturates alone are determined by shaking the sample with a mixture of 5 gm. boric acid in 100 cc. H2SO4 (d. 1,840). The boric acid mixture does not dissolve aromatics; P2O5 in H2SO4 catalyzes sulfonation and thus aids solution of aromatics.