3088.     SCHLATTMANN, O., AND KOPPENBERG, H.  Motor Fuel Produced From Coal by 3 Processes in Germany.  Trans. World Power Conf., 3d Conf., II, 4-5, September 1936, 20 pp.; Nat. Petrol. News, vol. 28, No. 37, 1936, pp. 24E-24H, 26, 28, 30, 32, 34; Chem. Abs., vol. 30, 1936, p. 8569.

        Motor fuel is produced by high-pressure hydrogenation of coal and the products recovered therefrom; by low-temperature carbonization and extraction by synthesis; and by low-temperature carbonization, distillation, cracking, and extraction.  The properties of gasoline produced from each method are compared.  It is seen that the types of gasolines obtained by hydrogenation and synthesis are fully equal to the refined gasolines obtained from crude oil.  The raw material consumption per kg. of gasoline and the smallest economical operating unit for the various raw materials are as follows:  By high-pressure hydrogenation of brown coal, 2.5 kg. and 40,000 tons; of bituminous coal, 1.66 kg. and 40,000 tons; of low-temperature brown coal tar, 1.25 kg. and 35,000 tons; by synthesis from brown-coal briquets, 10 kg. and 25,000 tons; from bituminous-coal coke, 5.4 kg. and 20,000 tons.  Taking into account all the sources of energy, the thermodynamic efficiency (energy of finished products/energy of raw material) of the synthetic process lies 0.2-0.3, compared with 0.3-0.4 for the hydrogenation process.