2167. MAYER, I. (Standard Oil Development Co.). Hydrocarbon Synthesis With Catalyst Reconditioning. United States Patent 2,562,806, July 31, 1951; appl. filed Apr. 23, 1948. Serial No. 22,794; 7 claims (Cl. 260-449.6).

In the process of synthesizing hydrocarbons by reacting CO+H₂ in the presence of a fluidized Fe catalyst in a reaction zone, the activity of the catalyst is maintained at a high level, and its tendency to disintegrate is repressed, by treating it in a catalyst conditioning zone with the tail gases from the synthesis reaction zone for enough time to convert a substantial portion of the Fe to Fe carbide. The gas is passed through the conditioning zone at a rate of about 100 cu. ft. per hr. per lb. of catalyst to suppress the formation of CO₂ and Fe oxide. Carbiding of the catalyst is carried out at pressures 60-600 p. s. i. g. Diagrams.

See abs. 2149, 2150, 2151.