2737. RAMAGE, A. S. Aromatic Hydrocarbons. British Patent 335,353, Sept. 3, 1929. Chem. Abs., vol. 25, 1931, p. 1259.

Hydrocarbons such as benzene, toluene, and xylene are produced by contact of a mixture containing unsaturated hydrocarbons, such as may be obtained by dehydrogenating light weathered products and casing-head gasoline vapors over ferric or cupric oxide, with CO and H_2, suitable water gas, with metallic Fe, at atmospheric pressure and a temperature of about 540°-815°, the catalyst being maintained active by the presence of an excess of the hydrocarbon and the reacting gases being, if necessary, freed from saturated hydrocarbons by passage over cupric or ferric oxide. Describes arrangement of apparatus.