3977.  ----- [WOODRUFF, J. C., AND BLOOMFIELD, G.] Catalyst for Synthetic Methanol Production. United States Patent 1,625,929, Apr. 26, 1927; appl. filed May 26, 1926. Chem. Abs., vol. 21, 1927, p. 1993.

Difficultly reducible metal oxides, such as Zn oxide, Cr oxide, Fe oxide and ZnCl₂, are used together.