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      236.     ------.  [BRAUNKOHLE-BENZIN, A. G.]  [Treatment of Catalysts for the hydrocarbon Synthesis From Carbon Monoxide and Hydrogen.]  German Patent 759,366, Mar. 15, 1939; app. B 186,669 (Cl. 12 6-1.03).  Auszuge deut. Patent-Anmeldungen, vol. 6, p. 6; Chem-Ztg., vol. 69, No. 2, 1945, p. 39.

Catalysts used in the hydrogenation of CO and impregnated with solid paraffin are freed from this by means of easily boiling solvents.