PATENTS

1776.         1776.   ------.  [JOHNSON, E. A.]  (Standard Oil Co. of Indiana).  Temperature Control of Chemical Reactions With Fluidized Solids.  United States Patent 2,393,909, Jan. 29, 1946; appl. filed Apr. 2, 1945, Serial No. 586,236: 5 claims (Cl. 260-449.6).  Chem. Abs., vol. 40. 1946. p. 1990.

Temperature of an exothermic reaction of H₂ and CO is controlled and the heat of reaction dissipated in a process comprising the following feature: (1) maintaining a mass of finely divided Fe catalyst in a reaction zone.  (2) introducing CO and H₂ at a low point in the zone.  (3) withdrawing gaseous reaction products from the top of the zone.  (4) passing the reacting gases upward through the zone to maintain the catalyst in a dense, turbulent, suspended phase; (5) bringing the catalyst into intimate contact with a solid heat-absorbing material having a greater settling rate than the catalyst, the material being inert under the zone conditions.  (6) carrying on the reaction under these conditions and absorbing heat from exothermic reaction by means of the added solids so that the temperature is maintained about 310°-321°, (7) separating the heated solids from the catalyst by the classifying action of the upward flowing gaseous fluids in the reaction zone. (8) removing the solids from a low point in the zone, (8) removing the solids from a low point in the zone.  (9) cooling the solids substantially below the reaction temperature, and (10) returning them to the zone at a high point.  A suitable size for the added solid is 10- to 40- mesh.  Suitable solids are crushed firebrick.  Fe shot, Al pellets, sand, metal oxides, or coke.  The diluent solid may also be a S acceptor such as Co, Mo, Cu, or Co molybdate supported on 1 of the solids.