3268.     STEINBERGER, K. F.  [Raw Materials for the Production of Acetylene and Ethylene.]  Angew. Chem., vol. 19, B, No. 8, 1947, pp. 211-214.

        Important prewar source for the raw materials of C2H2 and C2H4 was the hydrogenation gases from the Fischer-Tropsch and the I. G. Farbenindustrie A.-G. hydrogenation processes.  The total amount was 650,000-660,000 tons per yr., of which the Fischer-Tropsch process contributed 80,000-90,000 tons.  The Fischer-Tropsch gases contained 35-40% olefins, mostly C3 and C4, while those from the I. G. Farbenindustrie A.-G. process were mostly saturated hydrocarbons.  In general, they contained about 18% CH4, 11-12% C2H6, 12% C3H8, 5% C4H10 and 1% C5H12, 32-33% H2, with small amounts of N2, CO, CO2 and H2S.  these gases were processed by cracking in the electric arc, whereby, mainly C2H2 and some C2H4 were obtained, and by pyrolytic cracking of the saturated hydrocarbons, whereby, mainly, C2H4 was produced.  Cracking plants erected in Leuna, Holten, Heydebreck, and Moosburg had a capacity of 4,000 tons per yr. of C2H4.