2566. OWEN, J. J., AND SUMERFORD, S. D. (Standard Oil Development Co.). Synthesis of Hydrocarbons From Carbon Monoxide and Hydrogen With an Iron Type Catalyst. United States Patent 2,610,975, Sept. 16, 1952; appl. filed May 12, 1948, Serial No. 26,538; 4 claims (Cl. 260-449.6). Chem. Abs., vol. 47, 1953, p. 848.

It is found that the molecular weight of the product obtained by the reaction of CO with H2 over an Fe catalyst can be controlled by adding unreduced catalyst to the hydrocarbon synthesis reactor. The gas mixture is passed at about 625-725 F. and 400-600 p. s. i. in contact with a catalyst consisting of a major amount of metallic Fe and Fe oxides promoted with a minor amount of a K compound. The synthesis reaction is started with a fluidized mass of substantially reduced catalyst, and fresh unreduced Fe oxide catalyst is added continually in amounts sufficient to maintain the O2 content of the total catalyst > the equilibrium range. About 2-10% per day is needed, depending on the desired molecular weight of the product.