Copper catalyst for synthesizing organic silicon monomer and its preparation process

Abstract

The invention discloses a three-component copper catalyst with low metal copper content for the synthesis of organosilicon monomers and a preparation method thereof. It uses copper sulfate pentahydrate as a raw material, and is prepared after spray drying, dehydration, reduction and partial oxidation The composition and weight percentages included in its composition are as follows: cuprous oxide 40-80%, metal copper 8-60%, copper oxide 1-40%; the present invention shortens the dehydration time, has low energy consumption, high efficiency, and effectively reduces the The production cost is low, and the reduction reaction is more stable and thorough. At the same time, the copper catalyst of the present invention is used to synthesize organosilicon monomers, and has the characteristics of high catalytic activity and selectivity, strong raw material adaptability and good comprehensive indicators.

Description

technical field [0001] The invention relates to a catalyst and a preparation method thereof, in particular to a copper catalyst for synthesizing organosilicon monomers and a preparation method thereof. Background technique [0002] The synthesis reaction of organosilicon monomer is a heterogeneous contact catalytic exothermic reaction, and its influencing factors are various, including raw materials, catalysts, process flow and process parameters, etc., especially the performance of the catalyst plays a very important role in this reaction. [0003] As we all know, copper is the earliest classic catalyst used in the synthesis reaction of organosilicon monomers, but its activity and selectivity are not only related to its chemical composition, particle size distribution, surface state and preparation method, but also formed together with silicon powder and cocatalysts. method of contact. Therefore, after entering the 1970s, foreign countries mainly selected the following typ...

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Problems solved by technology

However, in practical applications, these types of catalysts still have the following disadvantages: using silicon-copper alloy as the contact body, its activity is poor, its life is short, and its selectivity is not good; pure copper powder has high requirements for raw materials and poor applicability. Not good; while the activity of cuprous chloride is not high, and the preparation process pollutes a lot

my country's "Ministry of Chemical Industry Chenguang Chemical Industry Research Institute Branch" applied for "Direct Method Synthesis of Copper Catalyst and Preparation of Methylchlorosilane" on June 9, 1987 (patent No. ZL87104211), the catalyst consists of 60-98% (weight) elemental copper, cuprous oxide of 1~35% (weight) and copper oxide three-component composition of 1~12% (weight), although its catalytic activity and storage stability all have obvious improvement, but after After more than ten years of application practice, it is found that the catalyst has defects in selectivity and preparation process, such as the content of copper oxide is not high enough, resulting in poor comprehensive performance such as activity and selectivity, and in the preparation process High energy consumption, long dehydration time, and unstable reduction reaction

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