587. EASLEY, J. C., AND KELLNER, H. L. (Gulf Research & Development Co.). Regenerations of a Fixed-Bed Fischer-Tropsch Catalyst. Untied States Patent 2,609,345. Sept. 2. 1952. Chem. Abs., vol. 47, 1953, p. 8995.

Patent Abstracts

587. EASLEY, J. C., AND KELLNER, H. L. (Gulf Research & Development Co.). Regenerations of a Fixed-Bed Fischer-Tropsch Catalyst. United States Patent 2,609,345. Sept. 2. 1952. Chem. Abs., vol. 47, 1953, p. 8995.

An Fe synthesis catalyst is regenerated with a mixture of air and an inert gas, whereby the maximum temperature difference in the catalyst bed if <300º F., with little increase in pressure drop across the bed. The regeneration gas mixture is preheated to 700º-800º F., and the component and rate of flow of gas are regulated so that the maximum temperature at any point in the catalyst bed does not exceed 1,000º F. In practice the regeneration is begun by flowing over the catalyst 100% inert gas preheated to 700º-800º F., to which air is then added. After 25 hr. the coke is burnt off, and the catalyst is ready for partial reduction. The total on-stream time for a catalyst treated in this manner was increased from 765 hr. to approximately 1,300 hr.