PATENTS

1770.         1770.   ------.  [JOHNSON, E. A.]  (Standard Oil Co. of Indiana).  Hydrocarbon Synthesis With Fluidized Catalyst Regeneration.  United States Patent 2,472,427.  June 7, 1949; appl. filed Feb. 27, 1947, Serial No. 731,241; 7 claims (Cl. 260-449.6).  Chem. Abs., vol. 43, 1949, p. 8120.

This is in addition to United States Patent 2,447,505 (abs. 1769).  Fluidized bed of catalyst of 2 to 200 micron size is maintained in the synthesis zone and a separate fluidized bed in a much smaller regeneration zone.  Catalyst is continuously transferred from the dense, turbulent phase in the synthesis zone to the regenerator and regenerated catalyst from the dense turbulent phase in the regeneration zone back to the reactor.  The charge gas is H₂:CO=2:1 mol. ratio.  The regeneration gas is essentially H₂.  It may contain inert diluents, but the CO content should be low.  The treatment with H₂ at a temperature higher than the conversion temperature, removes wax and/or carbonaceous deposits by chemical as well as physical means.  The H₂ reacts with the deposits to form hydrocarbons.  By correlating the effective heights of catalyst columns with densities, regulated by controlled aeration, directions of catalyst flow may be established and flow rates may be controlled.  The fluidized mass of catalyst may serve as seal between the reaction and regeneration zones.  7 United States patents cited.