3989.  YOSIMURA, R. IsII Tekkozio K. K.). [Catalyst for Preparation of Hydrogen by the Water-Gas Reaction.] Japanese Patent 132,592, Oct. 11, 1939. Chem. Abs., vol. 35, 1941, p. 3400.

Limonite, micaceous hematite and siderite, not containing over 1.5% P₂O₃ and heated >690°, are used as carrier for Fe₂O₃, or Cr₂O₃ prepared by precipitation.