2877.----- [RUHRCHEMIE A. G.] [Catalysts for the Carbon Monoxide Hydrogenation.] German patent Appl. -- . no date. FIAT Reel K-20, frames 279-285, Jan. 14, 1941; PB 70,211.

Draft of a patent specification. The Fe-containing residues from the production of Al are treated with alkaline solutions and mixed with kieselguhr. For raising the activity. an Fe, Cu, and /or Ca salt solution may be added before, during, or after the treatment with the alkaline solution.