Abstract
Authors made an investigation on the hydrogenation of unsaturated fatty oils with the copper-chromium-manganese oxide catalyst by adding metallic soaps, ferric oxide and a very small amount of reduced nickel.
As a results, it was found that the metallic soaps have no retarding effect on the activity of catalyst, but some of them, such as soaps of nickel, zink and copper have degrading effect on the selectivity of catalyst, whereas the soaps of lead, cadmium and sodium, known as the poison of nickel catalyst, had no degrading effect.
Ferric oxide has retarding effect on both the selectivity and activity of catalyst and a very small amount of reduced nickel has a degrading effect on the selectivity of catalyst.
Soaps of lead, cadmium and sodium have a tendency of suppressing the formation of trans isomer of oleic acid, whereas reduced nickel possesses the tendency to increase the formation of trans isomer in partially hydrogenated fatty oils.
