679. ------. [FISCHER, F., AND PICHLER, H.] (Studien- und Verwertungs-G. m. b. H.). [Process for the Production of Higher Hydrocarbons From Carbon Monoxide and Hydrogen Under Increased Pressure.] German Patent 738,091, July 1, 1943; appl. St. 58,896

Patent Abstracts

679. ------. [FISCHER, F., AND PICHLER, H.] (Studien- und Verwertungs-G. m. b. H.). [Process for the Production of Higher Hydrocarbons From Carbon Monoxide and Hydrogen Under Increased Pressure.] German Patent 738,091, July 1, 1943; appl. St. 58,896 filed July 7, 1939 (Cl. 12 o-1.03). FIAT Reel AA-90, frames 1,490-1,492, PB 70,275; TOM Reel 101, Doc. PQ-21, 576-NID; Meyer Transl., PC-S-II Fischer-Tropsch, vol. 6, chap. 170, 1949, p. 18; Chem. Abs., vol, 38, 1944, p. 4122.

Fe catalysts are used for synthesizing hydrocarbons from CO and H₂ at 10-30 atm. and 200º-300º. Before use the catalyst is pretreated with CO or gases containing CO at 230º-350º and a pressure amounting to a fraction of 1kg. Per cm.². The catalyst is prepared by precipitation from Fe nitrate solution and contains about 0.1% of alkali. The time of pretreatment is about 24 hr. at a rate of 400 l. of CO per kg. Of Fe per hr. The best synthesis results are obtained with a gas of composition CO:H₂=1.8:1, a pressure of 15 kg. per cm.², and a temperature of 235º. The gas contraction amounts to 55% with virtually a complete conversion of the CO. Yields of solid, liquid, and gasol hydrocarbons are 150 gm. per N m.³ of CO+H₂ mixture, without any lessening of catalyst activity in 3 mo. of operation.