Patents

2820.   -------- (Hydrocarbon Synthesis Corp.) .  Reactivation of Catalysts for Hydrogenation of Carbon Monoxide.  United States Patent 2,289,731, July 14, 1942; appl. filed Nov. 7, 1938; 5 claims (Cl. 252-243). Chem. Abs., vol. 37, 1943, p. 515.

Process is employed for the reactivation of spent catalysts, such as those containing Co, ThO₂, and MgO, from a process in which low-boiling hydrocarbons are synthesized by passing CO and H₂ through a catalytic chamber filled with the catalyst and heated to about 185º-192º, that involves increasing the temperature of the catalytic chamber and passing H₂ therethrough in contact with the catalyst until the paraffins are removed from the catalyst, then continuing the treatment at still higher temperatures approaching but not substantially exceeding 450º for a time sufficient to restore the catalyst substantially to the activity of a fresh catalyst.