361. ------. [CHEMISCHE WERKE ESSENER STEINKOHLE A. G.] [Process for Producing Higher Hydrocarbons by the Catalytic Hydrogenation of the Oxides of Carbon.] German Patent Appl. C 57,060, filed Jan. 26, 1942 (Cl. IV d-12 6). TOM Reel 177, frames 1,653-

Patent Abstracts

361. ------. [CHEMISCHE WERKE ESSENER STEINKOHLE A. G.] [Process for Producing Higher Hydrocarbons by the Catalytic Hydrogenation of the Oxides of Carbon.] German Patent Appl. C 57,060, filed Jan. 26, 1942 (Cl. IV d-12 6). TOM Reel 177, frames 1,653-1.654: Meyer Transl. PC-S-II. Fischer Tropsch. Vol. 1. chap. 42, 1948, p. 103.

Method described in German Patent Appl. C 56,917 (abs. 362), in which the hydrogenation is accomplished in several steps in such a manner that the fresh synthesis gas is contained in the 1^st step with the least active catalyst, the activity of which increases progressively from the 1^st to the last step and is improved by diluting the synthesis gas added in the last step with end gas. In such a manner overheating of the catalyst and a possible run-away reaction is avoided, prolonging the useful life of the catalyst and increasing the yield of desired products.