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Return to Abstracts of Patents Return to Abstracts of Patents 1000-1249 Patent Abstracts1077. ------. [HOGAN, J. P.] (Phillips Petroleum Co.). Pretreatment of Hydrocarbon Synthesis Catalyst. United States Patent 2,532,621. Dec. 5, 1950: appl. Filed Apr. 22, 1947, Serial No. 743,171; 6 claims (Cl. 260-449.6). Fresh or newly regenerated Fischer-Tropsch catalyst is contacted with CO-H2 synthesis gas under conditions of total recycle of effluent gas while the reaction temperature is slowly raised until reaction begins. The reaction temperature is then slowly increased to desired operating temperature, and the effluent gas is withdrawn at such a rate that the CO content of the effluent gas is allowed to increase to a definite concentration, during which period the temperature is increased to the desired operating point. Only enough pressure is charged to the reactor. 2-10 hr. is required. The CO content of the effluent gas increases from 2-3 to 6-12 mol. %. After this breaking in period, the Fischer-Tropsch synthesis is carried out as usual. 4 United States patents cited. |