PATENTS

      41.            ARVELSON, M. H.  (Standard Oil Co. of Indiana).  Catalytic Conversion Process.  United States Patent 2,398,489, Apr. 16, 1946: appl. Filed Nov. 24, 1941.  Serial No. 420,204: 3 claims (Cl. 196-52).  Chem. Abs., vol. 40, 1946, p. 4207.

Invention is concerned with catalytic conversion processes in which a powdered catalyst acts while suspended in gases or vapors.  The catalyst is separated from the reaction products and regenerated while suspended in a regeneration gas.  It is separated from the regeneration gas and returned to the converter as a slurry with fresh and recycle feed.  The catalyst may be powdered solid as Mo, Cr, or V oxides on “activated alumina” base.  In an example the following conditions are given:

Catalyst to naptha-feed weight ratio----------   0.24

Molecules H₂ per molecule feed--------------        3.0

Average reactor pressure p. s. i.---------------           200

Temperature-----------------------------------960° F.

Weight space velocity-----------------------0.7 hr.^-2

Catalyst residence time---------------------360 min.

Dehydrogenation and cyclization of paraffins and dehydrogenation of napthenes are predominant reactions.  East Texas heavy naphtha will be converted to a product of approximately SO ASTM octane number with a yield of SO vol. %.  The product will contain 5-15% toluene, depending in the exact distillation of the feed.  Both light and heavy naphtha prepared by hydrocarbon synthesis in the Fischer or Fischer-Tropsch process may also be converted to high octane number under these conditions.