2671.     ---------------.  [PICHLER, H.]  [Working Up Fischer-Tropsch Products.]  Brennstoff-Chem., vol. 16, 1935, pp. 404-406; Ges. Abhandl. Kenntnis Kohle, vol. 12, 1937, pp. 481-486; Chem. Abs., vol. 30, 1936, p. 3980.

        Synthetic-paraffin oil boiling at over 250° has been converted at 500°-600° and atmospheric pressure without carrier gas, in one step, into gaseous olefins and volatile unsaturated and aromatic hydrocarbons with 75% yields.  The remainder consisted of saturated gaseous hydrocarbons, unconverted paraffins, and aromatic tar.  Below 500°, conversion was small.  Above 600°, yields of gaseous olefins predominated.  Example:  20% olefins at 550° and 0.4 sec. reaction time in small tubes, 60% at 700° and 0.14 sec.