3054.----- [RUHRCHEMIE, A. G.] [Process for Preparing Unsaturated Hydrocarbons.] German patent Appl. R 106,263, R 531, filed Sept. 2, 1940. TOM Reel 39, bag 3,453, item 1.

In obtaining unsaturated hydrocarbons from the catalytic hydrogenation of CO, use is made of gas recycle or inert-gas addition, with reduction of the gas flow over catalyst.