882. ------. [GRIFFIN, L. I., JR.] (Standard Oil Development Co.). Hydrocarbon Synthesis. United States Patent 2,468,494, Apr. 26, 1949: appl. filed Dec. 7. 1944. Serial No. 567,063: 2 claims (Cl. 260-449.6). Chem. Abs., vol. 43. 1949. p. 7213.

Patent Abstracts

882. ------. [GRIFFIN, L. I., JR.] (Standard Oil Development Co.). Hydrocarbon Synthesis. United States Patent 2,468,494, Apr. 26, 1949: appl. filed Dec. 7. 1944. Serial No. 567,063: 2 claims (Cl. 260-449.6). Chem. Abs., vol. 43. 1949. p. 7213.

A portion of the catalyst is removed from the reaction zone to a washing zone in which a liquefied, normally gaseous hydrocarbon such as butane is circulated through the catalyst and removed through a filter to a recovery zone. The hydrocarbon is flashed off, and the liquid products and wax are recovered as a residue. The liquefied hydrocarbon is condensed and returned to the washing zone. The liquid- and wax-free catalyst is at least partly dried and returned to the reaction zone as a suspension in the synthesis gas. 1 literature ref., 1 foreign patent, and 10 United States patents cited.