752. ------. [FRIEDMAN, A. H.] (Phillips Petroleum Co.). Regeneration of a Carbonized Fischer-Tropsch Catalyst. United States Patent 2,605,234, July 29, 1952: appl. Filed Dec. 1, 1947, Serial No. 788,983; 8 claims (Cl. 252-411).

Patent Abstracts

752. ------. [FRIEDMAN, A. H.] (Phillips Petroleum Co.). Regeneration of a Carbonized Fischer-Tropsch Catalyst. United States Patent 2,605,234, July 29, 1952: appl. Filed Dec. 1, 1947, Serial No. 788,983; 8 claims (Cl. 252-411).

Fluidized metallic catalyst, which has been deactivated by surface deposition of C, is regenerated by being suspended in a gas inert to the surface deposited C and there caused to some into contact with itself or with some of the reactivated catalyst at a high velocity, so that the surface is abraded and the surface C removed and carried away in the effluent gas stream. Example: A fluidized Fe catalyst of 100- to 250-mesh, whose activity had declined to only 70% conversion at a space velocity of 1,500 vol. Synthesis gas per vol. Of catalyst per hr., was treated with H₂ at 300° at a linear velocity of 1 ft. per sec. Per 5 hr. When synthesis was resumed in the reactor, the activity of the catalyst had increased to 90% conversion at a space velocity of 2,500 vol. Synthesis gas per vol. Of catalyst per hr. and at a substantially lower temperature than before.

See abs. 718, 1079.