Solid catalyst for dimethyl carbonate and oxamide co-production process and preparation method of solid catalyst

Abstract

The invention discloses a solid catalyst for a process for co-producing dimethyl carbonate and oxamide by taking urea and dimethyl oxalate as raw materials. The catalyst is represented as CuO / MO, wherein CuO accounts for 50 to 95 percent of the total mass of the catalyst, and MO represents a doped oxide adjuvant and accounts for 5 to 50 percent of the total mass of the catalyst. The catalyst is prepared by using technologies such as a precipitation method and a hydrothermal method; and various oxide adjuvants are doped into a CuO bulk phase, and reasonable distribution of all the components in the catalyst is realized. The introduction of the oxide adjuvants is favorable for improving the stability of the catalyst, adjusting the surface acid-base property of the catalyst and improving the adsorption capacity of an active site for reactants. The catalyst has a good activation effect on the reaction raw materials, namely the urea and dimethyl oxalate; and during a reaction, by the application of the catalyst, the yield of oxamide can be up to 90 to 99.8 percent, and the yield of dimethyl carbonate can be up to 30 to 57.6 percent.

Description

technical field [0001] The invention includes a catalyst for driving a specific reaction and its preparation technology, in particular to a multi-component composite oxide catalyst with CuO as the main component and its preparation technology. The catalyst is used to drive urea and dimethyl oxalate to efficiently recombine carbonic acid Co-production process of dimethyl ester and oxamide. Background technique [0002] As an important green chemical intermediate, dimethyl carbonate has broad application prospects in the fields of medicine, biology and energy. It is known as the new cornerstone of organic synthesis in the 21st century. It is mainly used to synthesize bulk chemical raw materials such as polycarbonate, replacing Phosgene participates in the methylation and carbonylation process of organic synthesis, and can also be used as a gasoline additive to increase the octane number of gasoline to increase its antiknock performance. Utilizing the alcoholysis reaction of u...

AI Technical Summary

Problems solved by technology

Compared with the synthesis of dimethyl carbonate by urea alcoholysis method, due to the specificity of the co-production process in terms of raw material selection and reaction condition control, the catalyst that was originally suitable for urea alcoholysis reaction with ZnO as the main component, its active group The type, ratio and load mode of the points can no longer meet the needs of the co-production reaction

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