Zirconium oxide carrier catalyst based on ternary copper-based microspheres and preparation method thereof

Abstract

The invention provides a zirconium oxide carrier catalyst based on ternary copper-based microspheres and a preparation method thereof. The zirconium oxide carrier catalyst based on the ternary copper-based microspheres comprises a lamellar tetragonal ZrO2 carrier based on the ternary copper-based microspheres. The preparation method comprises the following steps: uniformly stirring and mixing a copper salt solution and a zirconium salt solution, slowly dropwise adding an alkaline solution, adding a co-catalyst, standing, aging, washing, suction filtering, drying, grinding into powder, roasting, and cooling to obtain copper oxide / zirconium oxide precursor; and adding the copper oxide / zirconium oxide precursor into the alkaline solution, stirring, heating in a water bath to a medium temperature, slowly dropwise adding hydrazine hydrate and glucose, performing the reduction reaction, after the reaction is ended, rapidly adding icy water for cooling, washing, suction filtering, vacuum drying, thus obtaining the zirconium oxide carrier catalyst based on the ternary copper-based microspheres. The preparation method is simple and high in efficiency, the change of Cu<2+> to Cu<+> to Cu<0>can be controlled, the reduction degree is controllable, a ratio of the Cu<0> and Cu<+> is increased, and the activity of the catalyst is high.

Description

technical field [0001] The invention belongs to the technical field of zirconia carrier catalyst materials, and in particular relates to a zirconia carrier catalyst based on ternary copper-based microspheres and a preparation method thereof. Background technique [0002] With the rapid development of petrochemical and fine organic chemical technology, the problems surrounding the preparation of dehydrogenation catalysts and the development of catalytic dehydrogenation reactions have attracted widespread attention and high attention. The catalysts used in the process of preparing corresponding ketones, aldehydes, acids and other compounds from alcohols used alkali metal hydroxides in the early stage. These catalysts often contain cadmium, chromium, nickel, etc., but due to their high toxicity, low activity, and no stable, its use in industry has been less successful. With people's continuous and in-depth research, the development and application of alcohol dehydrogenation ca...

AI Technical Summary

Problems solved by technology

The pre-oxidation temperature of this preparation method is 600-700°C, and the high-temperature calcination temperature is 1020-1080°C, which requires high equipment, and the degree of reduction is not easy to control, and the preparation method is relatively complicated, which is not conducive to industrial production.

Chinese patent CN 103127936B discloses a method for preparing a catalyst by a liquid-phase ball milling partial reduction method and a ternary copper catalyst. The preparation method is: adding copper oxide, hydrazine hydrate, glucose, formaldehyde, ascorbic acid or sodium borohydride reducing agent to water and / or in an organic solvent, grinding reaction, impurity removal, and pulverization to obtain a ternary copper-based catalyst. This method has simple raw materials, but the degree of reduction is controlled by the grinding time. The longer the grinding time, the higher the degree of reduction. The particle size of the ternary copper-based catalyst is approximately small , but the reaction efficiency is low, it is still difficult to meet the needs of industrial production