Investigation of the phase composition and structure of stationary catalysts to increase safety of agrarian-and-food production

Abstract

The phase composition and structure of stationary nickel-aluminum promoted catalysts have been studied. It is shown that the phase composition of the catalysts consists of intermetallic compounds NiAl, NiAl3, Ni2Al3. Changes in the microscopic structure of the alloys are determined. Modern methods for evaluating hydrogenation catalysts, as well as methods for analyzing raw materials and products of catalytic hydrogenation, have been established. The highest hydrogenation performance is characteristic of stationary catalysts whose alloys consist of Ni2Al3×4NiAl3 intermetallic compounds. New modifications of stationary alloyed nickel-copper-aluminum catalysts with the addition of vanadium (0.5-2.5 %), rhodium (0.5 %) and palladium (0.05 %) in the process of pre- contact hydrogenation of cottonseed oil have been studied and developed. It has been shown that the lowest content of transisomerized acids in tallow is achieved at a content of 1.5 % vanadium in a stationary promoted catalyst. The content ratio of the fatty-acid composition in the triglycerides of target dietary fats was determined, ensuring their increase in nutritional value and safety. The conditions under which the highest results were obtained are presented.