2824.     RIESZ, C. H., LISTER, F., SMITH, L. G., AND KOMAREWSKY, V. I.  Catalysts for Hydrocarbon Synthesis.  Ind. Eng. Chem., vol. 40, 1948, pp. 718-722; Chem. Abs., vol. 42, 1948, p. 4325.

        Hydrocarbon synthesis catalysts are regarded as complex-action catalysts, combining hydrogenation and polymerization.  Although complicated by carrier and promoter effects, the above was substantiated by preparation of 2-component catalysts containing Co, Ni, or Fe for the hydrogenating action; ThO2, SiO2, Al2O3, or ZnO as polymerization components.  Co-ThO2, Co-SiO2, and Co-Al2O3, were particularly active catalysts, optimum liquid formation occurring when the metal content of the catalyst was 75% by weight.  Ni catalysts formed excessive amounts of gaseous hydrocarbons, but Fe catalysts were relatively inactive in the absence of elevated pressure.

        RIGAMONTI, R.  See abs. 2395, 2396, 2397.