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.