3685. ----- [STUDIEN-UND VERWERTUNGS-G. M. B. H.] [Procedure for the Catalytic Conversion of Carbon Monoxide and Hydrogen to Hydrocarbons.] German Patent Appl. St 61,125, filed Dec. 18, 1942 (Cl. IV d-12 o). Navy 5811 IV-1; TOM Reel 134, item IV-1, 6pp.

It is possible by the isosynthesis process described to produce gasoline of high antiknock value. The process works with raised pressure and temperatures >350° , preferably >450° , but <600° and with a ThO₂ catalyst made from a diluted Th(NO₃)₄ solution precipated with Na₂CO₃ and fixed on a carrier. At 40 atm. pressure with a synthesis gas CO:H₂=50:40, a throughput of 175 l. per hr. (referred to 1 atm.), a temperature of 500° and a 1-stage operation, 33% of the gas was converted, producing 100gm. gasoline and gasol (C₃+C₄) besides CH₄ and C₂ hydrocarbons per m³. The gasoline, which contained predominatly branched-aliphatic hydrocarbons besides naphthenes and aromatics, had an olefin content of 15%, a refractive index n 20/D=1.40 and an octane no. (motor method) 80-90. Two-thirds of the C₄ fraction was iso-C₄H₁₀. The catalyst retained its efficiency for several mo. Under the same conditions, but with a pressure of 150 atm., the gas conversion was 66% and the hydrocarbon production 130g,. per m.³, and at 1,000 atm. and 450° , 85% of the gas was converted with, however, a content of 20% H₂O-soluble organic compounds in the liquid reaction products.