3867.  WARNER, B. R. (Gulf Research & Development Co.). Fischer-Tropsch Catalyst and Its Preparation. United States Patent 2,467,283, April 12, 1949; appl. filed Feb. 27, 1947, Serial No. 731,403; 9 claims (Cl. 252-474). Chem. Abs., vol. 43, 1949, p. 5573.

A H₂O soluble alkaline compound, such as K carbonate, is added to a warm aqueous solution of a H₂O soluble Fe salt, such as ferric nitrate, to the point of incipient precipitation. At this point, an aqueous solution of gallic acid is added, with stirring, and precipitation takes place. The precipitate is filtered, washed with H₂O and dried. The catalyst may be reduced or may be used directly in the synthesis. various promoters or activators may be added, and various supporting materials may be used. Example: To 607 parts H₂O Fe(No₃)₃ 9 H₂O dissolved in 3,000 parts H₂O were added, and precipitation took place. The precipitate was filtered washed with H₂O until the washing showed negligible nitrate content, and oven dried at 110° C. 2 literature refs. and 4 United States patents cited.