3869.  WATKINS, C. H. (Universal Oil Products Co.). Removal of Carbon Monoxide From Hydrocarbons. United States Patent 2,570,615, Oct. 9, 1951. Chem. Abs., vol. 46, 1952, p. 729.

Mixture is brought into contact with a catalyst prepared by reducing an Fe oxide ore at 800°-1,200° F. The catalyst is selective and completely hydrogenates the CO without effecting substantial hydrogenation of the olefins.