PATENT

2987. -----.[RUHRCHEMIE, A.G.] [Obtaining Olefinic Hydrocarbon Mixtures.]  German Patent 764,165, Apr.17, 1942; appl. R 109,476, R 557 (Cl.12 o-1.03).  TOM Reel 39, bag 3,453, Item 1.

Hydrocarbon mixtures of a highly olefinic nature may be obtained by the catalytic conversion of gas mixtures containing CO and H₂ and some unsaturated hydrocarbons in the presence of Co catalysts.  The conversion is carried out under normal atmospheric pressure and at temperature 185°-225°.  The catalysts are preferably diluted with inert material and the synthesis gas may contain up to 50% C₂H₂, preferably 1-2%.  Example:  A gas mixture consisting of 2 H₂, 1 CO, and 0.3 C₂H₂ by volume is passed under normal pressure at a rate of 1l. per hr. per gr. Co, 15 ThO₂ and 100 kieselguhr but no inert material.  On ordinary cold H₂O condensation of the gases leaving the reactor, a hydrocarbon mixture b. 230° was obtained containing 62 vol. % of olefins.  With more severe condensation, a further mixture b. 98° and containing 68 vol. % of olefins is obtained.