PATENT

3770. ----- [UHDE, F., AND PFIRRMANN, T.W].  [Motor Fuel.]  French Patent 841,528, May 22, 1939.  Chem. Abs., vol. 34, 1940, p. 4544.

Tar products obtained by destructive distillation are separated into 2 layers by mixing with Kogasin.  The upper layer, containing the Kogasin and nonaromatic hydrocarbons rich in H, is subjected to hydrogenation in gaseous phase.  The lower layer, containing in greater part aromatic and asphaltic substances, is hydrogenated in liquid phase.  The resulting products are motor and diesel fuels of high heating value.