688. ------. [FISCHER, F., AND PICHLER, H.] (Studien- und Verwertungs-G. m. b. H.). [Solid Aliphatic Hydrocarbons.] German Patent 705,528, Apr. 30, 1941; appl. St. 57,429, filed May 10, 1938 (Cl. 12 o-1.03). TOM Reel 134, item III-1.4 pp.: Chem. Zen

Patent Abstracts

688. ------. [FISCHER, F., AND PICHLER, H.] (Studien- und Verwertungs-G. m. b. H.). [Solid Aliphatic Hydrocarbons.] German Patent 705,528, Apr. 30, 1941; appl. St. 57,429, filed May 10, 1938 (Cl. 12 o-1.03). TOM Reel 134, item III-1.4 pp.: Chem. Zentralb., 1941, II, p. 839; Chem. Abs., vol. 36, 1942, p. 1943.

Process for the production of solid aliphatic hydrocarbons from H₂ and the C oxides at < 300º, preferably at 150º-280º, and at increased pressure, particularly > 30 atm., using a catalyst of Ru. The catalyst is prepared by conversion of metallic Ru with caustic potash and K nitrate into K ruthenate, which is dissolved in H₂O and converted at boiling temperature with MeOH into Ru dioxide, which is precipitated, filtered, washed, and dried. Reduction takes place with synthesis gas, CO: H₂=1:2, at atmospheric pressure and about 150º. At a temperature of 195º and 100 atm. pressure, 1 l. of CO-H₂ mixture per gm. Ru per hr. is passed over the catalyst yielding per m.³ of gas 150-160 gm. of hydrocarbons, 2/3 of which is solid, oil-free paraffin, and the rest liquid hydrocarbons. The life of the catalyst is virtually unlimited. The paraffin is white and melts at 118º-120º.