PATENT

3400. ----- [SOCIÉTÉ DES MINES DE DOURGES]  [Residual Gases From the Manufacture of Hydrogen.]  French Patent 706,504, Feb. 28, 1930.  Chem. Abs., vol. 26, 1932, 9 266.

Residual gases from the manufacture of H₂ by Fe-steam processes are converted into a mixture of Co, H₂, and N₂ by bringing the gases into contact with coke heated externally to about 1,200°.