PATENT

3404. ----- [SOCIÉTÉ D’ÉTUDES MINIÈRES ET INDUSTRIELLES.]  [Production of Methane.]  French Patent 590,744, June 22, 1925; appl. filed Feb. 15, 1924.  Chem. Zentralb., 1926, I, p. 2837.

Mixtures of CO and H₂ are heated and passed over catalyst of Rh black precipitated on asbestos or pumice.