3250.----- . [SCHARMANN, W. G. ] (Standard Oil Development Co.). Synthesis of Hydrocarbons. United States Patent 2,467,861, apr. 19, 1949; appl. filed Apr. 15, 1947, Serial No. 741,694; 17 claims (Cl. 260-449.6). Chem. Abs., vol. 43, 1949, p. 5928.

Preferred catalyst mixture is made up of 75-95 parts by weight of reduced Fe pyrites ashes or sintered synthetic FeO promoted with about 0.3-1% Na₂CO₃ as the low-carbonizing component and about 5-25 parts by weight of NH₃ synthesis catalyst as the high-activity, high-selectivity strongly carbonizing component. Optimum conditions depend on the composition of the specific catalyst mixture used. good results are obtained when fresh synthesis gas with or without recycle gas is passed upward through a fluidized mixture of catalyst particles, 50-to 400-mesh,at a gas velocity, 0.1-3 ft. per sec. to establish a bed density of 50-150 lb. per cu. ft. and a gas throughout of 5-25 cu. ft. of fresh CO:H₂ in ratio of 0.5-1: 1 per lb. of catalyst per hr. Temperatures of 550°-850° F. and pressures 150-1,000 p.s.i. are suitable for most catalyst mixtures, 9 United States patents cited.