3586.     VORBERG, G.  [Problems of the Production of Liquid Fuels From Coal.]  Seifensieder-Ztg., vol. 72, 1946, pp. 146-149, 166-168; Chem. Abs., vol. 43, 1949, p. 6390.

        Most important processes are discussed, including high-pressure hydrogenation, low-pressure synthesis, the Fischer-Tropsch process, and the extraction process of Pott and Broche.