2165. MAXTED, E. B. Revivification of Catalysts. British Patent 644,239, Oct. 4, 1950; appl. filed July 10, 1948. Chem. Abs., vol. 45, 1951, p. 2608.

Hydrogenation catalysts consisting of/or containing metallic Ni, Co, Cu, or Fe, which have become poisoned during use, are revivified by treatment with a peracid of Mo, W, Cr, V, P, or salt thereof and washing and drying.