GB255884A - Manufacture of nickel catalyst - Google Patents

Abstract

255,884. I. G. Farbenindustrie Akt.- Ges.,. (Assignees of Farbwerke vorm. Meister, Lucius, & Br³ning). July 22, 1925, [Convention date]. Catalytic agents, preparation and treatment of; hydrogenated organic compounds, catalytic production of.-Catalysts comprising nickel admixed or not with a metal of the iron or silver group are prepared by precipitating the nickel &c. as a crystalline hydroxide or carbonate in presence of a carrier, and then reducing the product with hydrogen at a temperature of 400‹ C. or above. To precipitate the hydroxide or carbonate in crystalline form, precipitation is effected slowly and at raised temperatures, suitable precipitants being alkali carbonates or, when ammonia compounds of nickel &c. are used, air containing carbon dioxide. The catalysts are suitable for use in hydrogenating processes, and in this connection reference is made to the production of isopropyl alcohol, ethylamine, and piperidine from acetone, acetonitrile, and pyridine respectively. According to one example, mixture of ammoniacal nickel nitrate solution and silicic acid gel is heated to 70‹ C. and treated with a strong current of air. The precipitate obtained after about 4 hours is filtered, washed, and dried, and is then treated with hydrogen at a temperature of 100- 130‹ C. which is gradually raised during 5 or 6 hours to 415-420‹ C. When reduction is complete the product is quickly cooled in presence of hydrogen and is poured into a suitable suspending agent such as water or pyridine. According to another example, a mixture of nickel nitrate solution and silicic acid gel is heated to 70‹ C. and treated with sodium carbonate solution added drop by drop over a period of 8 hours, and accord. ing to a further example a mixture of a solution of nickel, cobalt, and copper nitrates and silicic acid gel is similarly treated. In each case the product is further treated as described above.