664. ------. [FISCHER, F.] (Studien- und Verwertungs-G. m. b. H.). Catalytic Synthesis of Aliphatic Hydrocarbons, as in Production of Light Liquid Hydrocarbons. United States Patent 2,149,515, Mar. 7, 1939; appl. Filed Apr. 15, 1935. Chem. Abs., vol

Patent Abstracts

664. ------. [FISCHER, F.] (Studien- und Verwertungs-G. m. b. H.). Catalytic Synthesis of Aliphatic Hydrocarbons, as in Production of Light Liquid Hydrocarbons. United States Patent 2,149,515, Mar. 7, 1939; appl. Filed Apr. 15, 1935. Chem. Abs., vol. 33, 1939, p. 4270.

Method of increasing the yield in the catalytic synthesis of aliphatic hydrocarbons having more than 1 C atom in the molecule from CO and H₂, in which the synthesis is carried out in stages, involves effecting partial conversion of the mixture of CO and H₂ in the first stage to the extent of <2/3 the available quantity, Cl in H₂0, precipitated with Na₂CO₃, washed until free from alkali, impregnated with 0.125% K₂CO₃ dried at 110°, granulated, and deposited on a carrier. Induction of the catalyst takes place at >200° and a pressure below that of the succeeding synthesis (or at 240° and atm. pressure) with synthesis gas in volume ratio of CO:H₂=1.2, and until the gas contraction stains a maximum of about 30% in about 3 days time. The following conversion may then be carried out at 15 atm. and 260° with a synthesis gas of composition CO:H₂=3:2 and a rate of 400 l. of gas per kg. Fe per hr. Contraction amounts to 50% and the yield of hydrocarbons to 130-150 gm. Per m^.3 of gas, of which 80-90 gm. is solid and liquid hydrocarbons and 50 gm. Easily liquefiable benzine.