3904.  WENZEL, ---,WINTZER,, ---, AND REISINGER,---. (I. G. Farbenindusrie A. G.). [Conversion of Carbon Monoxide With Hydrogen to Liquid and Solid Oxygenated Hydrocarbons.] German Patent Appl. I 71,725, OZ 13,281, filed Mar. 2, 1942 (Cl. IV d-12 o). FIAT Reel 172, frames 284-285; PB 25,616; TOM Reel 17, item 32, frames 872-880; TOM Reel 19, item 139, frames 1,631-1,639; Meyer Transl. PC-S-II, Fischer-Tropsch, vol. 2, 1948, chap, 96, p. 61.

In the conversion of CO with H₂ under increased pressure and such conditions that the O of the converted CO is not combined in the form of the oxygenated derivatives but chiefly in the form of CO_2, maintenance of a low conversion temperature holds the rate of conversion at so low a point that at most only 50% or less of the heat of conversion is generated, the effect of which is the formation especially of multibranched hydrocarbons instead of an inadmissibly high CH₄ formation. The temperature is some 10°-20° lower than that generally observed for the conversion to products consisting mainly of multibranched hydrocarbons. The lower the rate of conversion is maintained through the choice of a relatively low temperature, the greater is the proportion of oxygenated organic compounds in the products. These may be present up to 50 or 60% or more in the various fractions of the products. The use of increased pressure (12-50 atm.), and Fe catalysts of practically any origin is preferred with a gas ratio of CO:H₃=!:1-1:0.5 and a temperature 170°-250°.