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Patent Abstracts

      1109.  HUDSON, T. B.  (Phillips Petroleum Co.).  Method of Catalyst Control in Organic Reactions.  United States Patent 2,590,539, Mar. 25, 1952; appl. filed Oct. 14, 1947, Serial No. 779,786; 4 claims (Cl. 260-449.6.).

            Catalyzed exothermic organic conversions, such as those involved in the Fischer-Tropsch process, are effected by passing a fluid reaction mixture through a reaction zone under conditions so chosen that increase of temperature occurs in the direction of flow of the reaction mixture, owing to the exothermic heat of reaction.  A solid mobile catalyst is introduced into the reaction zone at a number of points and passed countercurrently to the reaction mixture.  The quantity and activity of the catalyst is so controlled as to provide a decreasing amount of catalyst activity in the direction of flow of the reactants as an inverse function of the temperature thus tending to equalize the extent of reaction throughout the reaction zone.  In reducing CO with H2 to form aliphatic organic compounds, enough heat of reaction is removed to limit the temperature rise to an amount avoiding undesired reactions.