PATENT

3315.  SEGURA, M. A.  (Standard Oil Development Co.).  Catalyst for Reduction of Oxides of Carbon With Hydrogen.  United States Patent 2,476,920, July 19, 1949; appl. filed Dec. 22, 1945, Serial No. 637,062; 14 claims (Cl. 260-449.6).  Chem. Abs., vol. 43, 1949, p. 8076.

Pyritic ores, such as pyrite, marcosite, and pyrrhotite, are roasted at 1,800°-2,200° F. to produce Fe₂O₃ which is then gently sintered.  A typical analysis of such roasted material is:  Fe₂O₃ 96.2%, reducible O₂ combined with Fe 27.0%, silica 1.5%, and S< 0.05.  The material is ground to preferred size for fixed bed or fluid-type reactor.  The catalyst is impregnated with 0.5-10% promoter, such as Na₂CO₃K₂CO₃, KCl, K₂HPO₃, or alkali metal aluminates.  Cu, Ag, Ni, and Th oxide may be used.  The promoters may be mixed with the roasted ore and fused.  The catalyst is reduced with H2k at 550°-1,100° F.  1 foreign patent and 7 United States patents cited.