PATENTS

2838.-----  [RUBIN, L. C.] (M. W. Kellogg Co.).  Synthesis of Organic Compounds.  United States Patent 2,576,858 Nov. 27, 1951;  appl. filed May, 1948, Serial No. 25,256; 14 claims (Cl. 260-449.6). 

            This is a continuation of the United States Patent 2,448,279 (abs. 2837).  A C oxide is hydrogenated by passing the reactants upward through a reaction zone containing a catalyst at such a velocity that the catalyst is kept in suspension.  The upward linear velocity of the gaseous mixture and the bulk of the catalyst material are so limited as to form a lower dense phase consisting of the greater part of the catalyst mass, in which the catalyst particles circulate at a relatively high rate, and an upper dilute phase, the 2 phases forming an interface between.  The upward velocity of the gaseous mixture is kept at a higher rate than the free settling rate of the particles comprising the greater part of the dense phase, whereby catalyst particles are entrained in the gaseous reaction mixture passing from the dense phase to the dilute phase.  A liquid, substantially free from solids and completely vaporizable at the reaction conditions,  is injected into the dilute phase adjacent to the interface, cooling the reaction gases and disengaging a substantial proportion of the entrained catalyst material which falls back into the dense phase.  Gaseous reaction mixture and vaporized liquid from the reaction zone are withdrawn to recover the reaction products.  The catalyst may comprise Co or Fe supported on acid treated bentonite and promoted with MgO, for example, Co: 0.15 MgO: 2.0 Superfiltrol.