PATENT

2923. -----.[RUHRCHEMIE, A.G.] Hydrocarbons. British Patent 471,595, Sept. 7, 1937.  Chem. Abs., vol. 32, 1938, p. 1276.

In the catalytic conversion of C oxides and H₂ into hydrocarbons, the catalysts are charged, before, during, or after their preparation, with hydrocarbons in liquid, molten, or dissolved state, which are carried away after the reaction has begun.  The high initial activity of the catalyst is thus reduced.  In examples, (1) equal parts of kieselguhr and CoCO₃ with activating additions are treated with a benzine solution of solid paraffin so that, after evaporation of benzine, 5% of paraffin remains in the catalyst, which is shaped and reduced with H₂ at 200°, surplus paraffin draining off; CO and H₂ are introduced, the reaction beginning slowly but increasing in intensity as the gas stream carries off the paraffin, and (2) NiCO₃ is precipitated on kieselguhr from a solution of Ni and Al nitrates, the product granulated, reduced with H₂ at 450° and introduced into melted paraffin, O₂ being excluded; surplus paraffin is removed.  The granules harden on cooling and are unaffected by air.