PATENTS

1791.  ------. [KALBACH, J. C.] (Hydrocarbon Research, Inc.). Fuel Gas. United States Patent 2,609,283, Sept. 2, 1952. Chem. Abs., vol. 47, 1953, p. 849.

High-heating-value fuel gas is produced by simultaneously hydrogenating and carbonizing autogenously a comminuted, solid carbonaceous material containing volatilizable constituents in a dense-phase fluidized bed in the presence of a stream of H2 at 300-750 p. s. i. g. and about 538º-816º. From the carbonizer a mixture of hydrocarbons and unreacted H is withdrawn, together with a C-containing residue. The latter is gasified with steam and air to produce CO and H2. The H2 is separated from the CO and used in the carbonizer, and the CO is added to the gases from the carbonizer.