2639. PHINNEY, J. A. (Stanolind Oil & Gas. Co.). Method and Apparatus for Making Hydrogen-Carbon Monoxide Mixtures. United States Patent 2,532,514, Dec. 5, 1950; appl. filed Aug. 14, 1945, Serial No. 610,845; 4 claims (Cl. 48-196). Chem. Abs., vol. 45, 1951, p. 1326.

Air, natural gas or CH4, and recycle CO2 are separately preheated by heat exchange with hot synthesis gas combined and reacted over a catalyst at 1,900 F. The temperature before the preheating by heat exchange is 850 F., increased in the heat exchange tubes to 1,625 F. The gaseous product leaves the exchanger at about 1,000 F. and is supplied to a hydrocarbon synthesis zone after cooling to about 400 F. Co or Fe fluidized catalyst is used. Coke produced in the preheating of CH4 is oxidized by the air and each zone is purged by CO2 before and after the introduction of air. Describes apparatus. 1 foreign patent and 10 United States patents cited.