472. DEMING, P. H. (Shell Development Co.). Production of Hydrocarbon-Oxygen Mixtures. United States Patent 2,519,955, Aug. 22, 1950; appl. filed Sept. 3, 1946, Serial No. 694,529; 12 claims (Cl. 62-175.5). Chem. Abs., vol. 44, 1950, p. 10,302.

Patent Abstracts

472. DEMING, P. H. (Shell Development Co.). Production of Hydrocarbon-Oxygen Mixtures. United States Patent 2,519,955, Aug. 22, 1950; appl. filed Sept. 3, 1946, Serial No. 694,529; 12 claims (Cl. 62-175.5). Chem. Abs., vol. 44, 1950, p. 10,302.

Mixtures of CH₄ and O₂ suitable for preparation of Fischer-Tropsch synthesis gas are produced in a 2-stage process. (1) A stream of precooled air is passed upward through a rectifying absorption vessel, and a stream of liquefied portion of natural gas, principally CH₄, is passed downward in countercurrent flow to produce a separated stream of N₂ substantially free from O₂ and hydrocarbons and liquefied phase if natural-gas hydrocarbons and O₂. (2) The liquefied phase is stripped with CH₄ at a low temperature to produce a CH₄-O₂ mixture. A liquefied natural-gas residue containing a low concentration of O₂ remains. 2 United States patents cited.

DENKER, H. See abs. 3231.

DE NORA, V. See abs. 467.