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Return to Abstracts of Patents Return to Abstracts of Patents 1000-1249 Patent Abstracts1018. ------ [HERBERT, W.]. (Metallgesellchaft A. G.). [Production of High Paraffinic and Olefinic Hydrocarbons.] German Patent 761,883, Aug. 23, 1951; appl. M 136,500 filed Dec. 3, 1936 (Cl. 12 o). Chem. Zentralb., 1952, p. 624. In converting gases containing CO and H2 in a catalyst furnace having narrow layers of paraffin forming catalyst and closely lying cooling elements, operation is carried on under a pressure of 5-10 atm. with a synthesis gas containing 20% or more of inert constituents such as CH4, higher hydrocarbons, N2, steam, or alcohols. A part of the end gas after partial of complete removal of the reaction products is recycled to the reactor, and the fresh synthesis gas is admitted at the middle of the reaction zone or over several such zones of a catalyst furnace having several reaction zones. 4.5 ton or 15 M.3 of a catalyst comprising Co 33%, ThO2 18% on kieselguhr are divided into 2 reactors in the ratio of 10 : 5. The reactors are connected in series and behind each one are arranged a condenser and an active C plant. Into the 1st reactor is passed at normal pressure 1,000 N m.3 of standard synthesis gas (30% CO, 60% H2, 4% N2, 0.5% CH4, 5.5% CO2), and the reaction temperature is kept at 185°. After the reaction products are separated, there remain 500 m.3 of residual gas that are conducted to the 2d reactor under the same conditions. Then 250 N cc. of residual gas remains. For every N cc. of inert-free entrance gas, 112 gm. of reaction products are obtained consisting of 8% paraffin (b. 320°), 25% higher boiling oils, and 57% benzine (b. up to 200°). The olefin content of the latter is 32%. The life of the catalyst is 3 months. |