712. ------. [FISCHER, F., PICHLER, H., AND ZIESECKE, K.] (Studien- und Verwertungs-G. m. b. H.). [Process for the Production of Antiknock Hydrocarbons.] German Patent Appl. St 62,589, filed De. 14, 1942 (Cl. IV d012 o). TOM Reel 100; TOM Reel 134, it

Patent Abstracts

712. ------. [FISCHER, F., PICHLER, H., AND ZIESECKE, K.] (Studien- und Verwertungs-G. m. b. H.). [Process for the Production of Antiknock Hydrocarbons.] German Patent Appl. St 62,589, filed De. 14, 1942 (Cl. IV d012 o). TOM Reel 100; TOM Reel 134, item IV-4, 4 pp.

In producing branched aliphatic hydrocarbons from CO and H₂, German Patent Appl. St 62,438 (abs. 711), with a ThO₂ catalyst, the Th can be replaced wholly or in part by other oxides from the 3d to the 6^th group; for example, the oxides of Al, W, Zr, or the rare earths. At 200-500 atm. and > 350º these catalysts will produce branched aliphatic hydrocarbons and at still higher temperatures, cyclic hydrocarbons. The activity of the catalyst is increased by adding a small amount of ZnO (Al₂O₃:ZnO-4:1). By passing synthesis gas at the rate of 400 l. per l. of catalyst per hr. at 300 atm. and 410º, a yield of 100 gm. per m.³ of inert-free gas of gasol and liquid hydrocarbons is obtained. These liquid products consist almost entirely of branched, aliphatic hydrocarbons, 80% of which are isobutane and isobutene.