PATENT

3945.  WILLIAMS, T. S.  (M. W. Kellogg Co.).  Synthesis of Organic Compounds.  United States Patent 2,615,911, Oct. 28, 1952; appl. filed Mar. 21, 1947, Serial No. 736,323; 10 claims (Cl. 260-449.6).  Chem. Abs., vol. 47, 1953, p. 9346.

Difficulty of fluidizing finely divided material, such as Fe catalyst, during activation or reactivation is solved by mixing the catalyst with diluent material, such as silica, quartz, alumina, bentonite-type clay, diatomaceous earth, bauxite, kieselguhr, or super Filtrol.  These materials retain a fluidized condition in either an oxidizing or reducing atmosphere at 2,000° f. or above.  The fluidization characteristic of the diluent is imparted to the entire mass.  The diluent should comprise50-95% by weight of the mixture.  Pressure equivalent to that in the reaction zone and a linear velocity of 0.1-40 ft. per sec. are maintained.  12 United States patents cited.