3876. ----- [WATSON, C. W.] (The Texas Co.).Stabilization of Fluidized Iron Synthesis Catalyst. United States Patent 2,616,915, Nov. 4, 1952; appl. filed Oct. 30, 1947, serial No. 783,064; 5 claims (Cl. 260-449.6). Chem. Abs., vol. 47, 1953, p. 1361.

PATENT

3876. ----- [WATSON, C. W.] (The Texas Co.).Stabilization of Fluidized Iron Synthesis Catalyst. United States Patent 2,616,915, Nov. 4, 1952; appl. filed Oct. 30, 1947, serial No. 783,064; 5 claims (Cl. 260-449.6). Chem. Abs., vol. 47, 1953, p. 1361.

Catalyst particles, < 400-mesh, are recovered from the gaseous products. They are cemented by mixing with 25% by weight of Ca aluminate refractory cement and sufficient H₂O to form a mortar. After the mix sets, it is ground and graded to 150-to 300-mesh. The graded particles are continuously returned to the reaction zone. After treating the recovered fines over a period of approximately 200 hr., the proportion of lines in the stream of reaction products is reduced to a negligible factor, and the stabilization treatment can be discontinued. The invention is particularly applicable to hydrocarbon synthesis using Fe catalyst. The catalyst may contain any of the usual promoters, but K oxide (0.5-1.5%) and Al oxide (1.5-5%) are preferred. 12 United States patents cited.