464. DART. J. C., AND SMITH, L. B. (Standard Oil Development Co.). Hydrocarbon Synthesis Process. United States Patent 2,489,451, Nov. 29, 1949; appl. Filed June 20, 1946, Serial No., 678,168: 8 claims (Cl. 260-449.6). Chem. Abs., vol. 44, 1950, p. 167

Patent Abstracts

464. DART. J. C., AND SMITH, L. B. (Standard Oil Development Co.). Hydrocarbon Synthesis Process. United States Patent 2,489,451, Nov. 29, 1949; appl. Filed June 20, 1946, Serial No., 678,168: 8 claims (Cl. 260-449.6). Chem. Abs., vol. 44, 1950, p. 1676.

In conducting the Fischer-Tropsch synthesis the initial stage is run at pressure below 350 p. s. i., preferably 200-300 p. s. i. until C formation on the catalyst is 30-55%, based on weight of C-free catalyst. The pressure is then raised to above 350 p. s. i. for the 2d stage, preferably 400-800 p. s. i. 4 United States patents cited.