Return to Abstracts of Literature

Return to Abstracts of Literature 1500-1749

Literature Abstracts

 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.