PATENT

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 CO2, 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°.