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Return to Abstracts of Patents Return to Abstracts of Patents 1000-1249 Patent Abstracts1176. ------. [I. G. FARBENINDUSTRIE A. G.] Catalytic Apparatus. British Patent 458,035. Dec. 11, 1936. Chem. Abs., vol. 31, 1937, p. 3343. Conversion of oxides of C with H2 into hydrocarbons or their O-containing derivatives is conducted in a apparatus, where the conversion is catalytically promoted by the internal surfaces of the apparatus itself, which at the parts coming into contact with the gas mixture comprises an etched metal, particularly Fe. Preferably, no other catalyst is present. Suitable metals include ingot steel, Fe special steels, Ni, Co, Cu and their alloys, and metals coated with Zn, Ni, or Co; for example, by electrolysis, burning, or soldering. The surfaces may be etched with acid, for example, HNO3, AcOH, lactic, formic, or pieric, and compounds of U, alkali-metals, Cu, Ag, Mg, Hg, Mn, or Cr. Especially UO2(NO3)2, CU(NO3)2, Mg(NO3)2, and KNC3, may be added to the acids, as activators for the catalyst. Other materials may be used, such as alkalies or NH4OH in the case of ZN and Fe: electrolysis: salts, for example, alkali nitrates, NH4Cl, CuSO4; gases, for example, HCl, oxides of N; or fused substances. In an example, the outer surface of a steel tubular spiral, made of Mannesmann-SII ingot steel and lined with Cu is etched with a solution of glacial AcOH, UO2(NO3)2 and KNO3, superheated steam at 200°-100° is passed through the spiral at 12 atm. as a heating and cooling medium and H2 is 1st led through the reaction chamber past the spiral and then a mixture of equal parts of CO and H2 at 100 atm, and 368°-412°. The product consists of oil and readily volatilizable hydrocarbons and a gas containing CH4, C2H4, and homologs. |