1958. ------. [KREBS, R. W.] (Standard Oil Development Co.). Two-Stage Reduction Process for Producing Metal Catalyst. United States Patent 2,481,226, Sept. 6, 1949; appl. filed Oct. 17, 1945, Serial No. 622,930; 4 claims (Cl. 75-26). Chem. Abs., vol. 44,

PATENTS

1958. ------. [KREBS, R. W.] (Standard Oil Development Co.). Two-Stage Reduction Process for Producing Metal Catalyst. United States Patent 2,481,226, Sept. 6, 1949; appl. filed Oct. 17, 1945, Serial No. 622,930; 4 claims (Cl. 75-26). Chem. Abs., vol. 44, 1950, p. 824.

Fe oxide and Co oxide are reduced in a 2-stage operation. Impure H₂ is used in the 1^st stage and highly purified H₂ in the 2d stage. Considerable expense is saved by this method for the production of hydrogenation catalysts. Details of the reducing process are claimed. 5 United States patents cited.

------. See abs. 885, 1786, 1787, 3360, 3851.