980. ------. [HEMMINGER, C. E.] (Standard Oil Development Co.). Pretreatment of Catalyst for Hydrocarbon Synthesis. United States Patent 2,560,345, July 10, 1951; appl. filed Dec. 23, 1947, Serial No. 793,368; 4 claims (Cl. 260-449.6).

Patent Abstracts

980. ------. [HEMMINGER, C. E.] (Standard Oil Development Co.). Pretreatment of Catalyst for Hydrocarbon Synthesis. United States Patent 2,560,345, July 10, 1951; appl. filed Dec. 23, 1947, Serial No. 793,368; 4 claims (Cl. 260-449.6).

Standard method of synthesizing hydrocarbons from CO and H₂ in the presence of a fluidized Fe catalyst is improved by first reducing and O₂-containing Fe catalyst with H₂ to an O₂ content of about 0.10 wt. % of the Fe, then treating the reduced catalyst with fresh synthesis gas, containing CO and H₂ in the ratio of 1-2 mol. H₂ per mol CO at a temperature 550º-750º F. and a H₂ partial pressure of 100-150 p. s. i., for a time, 0.5-5 hr., sufficient to convert 25-50 wt. % of its Fe content into a mixture of Fe carbides, in which Fe₂C predominates. Such treatment results in less C deposition on the catalyst during synthesis and less disintegration.