3454.     ---------------.  [TROPSCH, H.]  [Composition of the Products Obtained in the Synthesis of Petroleum.]  Ges. Abhandl. Kenntnis Kohle, vol. 9, 1930, pp. 561-570; Chem. Abs., vol. 25, 1931, p. 3806.

        Benzine fraction, boiling at 60-185, of the synthetic petroleum obtained by catalytic reduction of CO at ordinary pressures has been examined (abs. 1021).

        After fractionating at every 10, the specific gravity, n, an I value of each fraction were determined.  The olefins were determined by separation as the double compound with Hg acetate, being subsequently regenerated by dilute HCl.  The benzine was found to consist almost entirely of a mixture of paraffins, n-pentane to n-nonane, also iso-nonane, with the corresponding olefins, the latter predominating, especially in the lower-boiling fractions.  It was quite stable to air and light for at least 2 yr.