3768. ----- [UHDE, F., AND PFIRRMANN, T.W]. Motor Fuel. British Patent 505,953, May 19,1939; appl. filed Aug. 29, 1938. British Chem. Abs., 1939, B, p. 693; Chem. Abs., vol. 33, 1939, p. 9599.

Gasoline and diesel fuels are made from tars, such as brown coal, low-or high temperature or producer tar, by treating them with a middle oil obtained in the reduction of CO with H₂ and separating the extract from the heavy-oil residue, the extract being then hydrogenated In the gas phase and oil residue hydrogenated in the gas phase and the oil residue hydrogenated in the liquid phase to form fuels. The gas phase is carried out over rigid catalysts immune to S poisoning at 420°-440°, the liquid phase in presence of finely divided Mo or Sn catalysts at 450°-500° at higher pressures.