Method for preparing catalyst for methanol dehydrogenation to methyl formate through step coprecipitation-spray process

Abstract

The invention discloses a method for preparing catalyst for methanol dehydrogenation to methyl formate through a step coprecipitation-spray drying process. The method is that step coprecipitation is performed to copper, zinc and aluminum salt solution and alkaline solution, after the copper, zinc and aluminum salt solution and alkaline solution are pulped and filtered with hot desalted water, a qualified filter cake is obtained and is subjected to colloid mill processing, spray drying is performed to size, and dried catalyst precursor is roasted and formed so as to obtain the catalyst for methanol dehydrogenation. The catalyst prepared by the method has the characteristics of high catalytic activity and selectivity and strong stability.

Description

technical field [0001] The invention relates to a method for preparing a catalyst, in particular to a method for preparing a methyl formate catalyst by dehydrogenating copper-based methanol in the chemical industry, and belongs to the technical field of catalyst preparation. Background technique [0002] In the field of coal chemical industry and fine chemical industry, copper-based catalysts have been widely used in many solid-phase reactions of hydrogenation, dehydrogenation and reforming to produce hydrogen, such as methanol dehydrogenation to methyl formate, medium and low pressure synthesis gas to produce methanol, methanol water Hydrogen production by steam reforming, carbon monoxide low-temperature shift and other reactions. The main components of copper-based catalysts are generally CuO, ZnO and Al 2 o 3 , the traditional copper-based catalyst products are mainly synthesized by co-precipitation reaction of three metal components of Cu, Zn, Al and alkali. For examp...

AI Technical Summary

Problems solved by technology

However, the current catalysts for methanol dehydrogenation to methyl formate generally use copper-based catalysts. Due to the characteristics of the preparation process of copper-based catalysts, the single-pass conversion rate of methanol and methyl formate selectivity of the catalyst are relatively low, and the single-pass conversion rate of methanol is generally low. At 30%, the selectivity of methyl formate is lower than 85%, generating higher levels of gaseous impurities such as carbon monoxide, carbon dioxide and methane

Moreover, a large amount of unreacted methanol is circulated in the system, which increases energy consumption and the production cost of methyl formate to a certain extent