1792.  ------. [KALBACH, J. C.] (Hydrocarbon Research, Inc.). Fuel Gas. United States Patent 2,639,982, May 26, 1953. Chem. Abs., vol. 47, 1953, p. 7197.

In the hydrogenation of carbonaceous solids at elevated temperature and pressure, a fuel gas of high heating value is produced when (1) the particles of the solids are slurried with a liquid hydrocarbon, which is substantially completely vaporizable under the reaction conditions; (2) the slurry is mixed with a gas rich in H₂ in a reactor; (3) the liquid hydrocarbon is vaporized in the reactor, and a dense fluidized bed of the carbonaceous material is maintained in the reactor by passing the vapors and gas upward through the bed to effect fluidization and hydrogenation; and (4) the hydrogenation products and vaporized hydrocarbon are recovered from the reactor. In the hydrogenation of coal the temperature may range from about 288º-538º and the pressure from about 750-1,000 p. s. i. g. or higher.

See also United States Patent 2,609,283 (abs. 1791).