3937.  WILKE, E., AND FRIED, F. (I. G. Farbenindustrie a. g.). [Hydrogen and Carbon Monoxide From Methane.] German Patent 525,556, May 26, 1931; appl. filed Sept. 12, 1929. Chem. Abs., vol. 25, 1931, p. 4672.

H₂ and CO are prepared by passing CH₄ over metallic oxides, except those of Fe, which can pass to a lower stage of oxidation. TiO₂ and CrO₃ are mentioned in examples.

See also British patents 336,635 and 336,944 (abs. 1308 and 1309).