Application and preparation method of bimetallic catalyst for synthesizing dimethyl 1,2-cyclohexanedicarboxylate from dimethyl phthalate

Abstract

The invention belongs to the field of catalyst preparation, and particularly relates to an application and a preparation method of a bimetallic catalyst for synthesizing dimethyl 1,2-cyclohexanedicarboxylate from dimethyl phthalate. An M-Ni / nitrogen-doped carbon nanotube (M=Ru, Pd) bimetallic catalyst is prepared by taking a nitrogen-doped carbon nanotube as a dispersing agent and a carrier and utilizing a couple replacement method. The catalyst prepared by the method has the advantages of large specific surface area, high mechanical strength, small mass transfer limit, more uniform dispersion of active components on the surface of the carrier and the like; the preparation method is simple and easy to implement, high in operability, available for batch preparation and small in environmental pollution, and the catalyst can be used in a reaction for hydrogenation synthesis of dimethyl 1,2-cyclohexanedicarboxylate from dimethyl phthalate; and the reaction activity of the catalyst and the selectivity of dimethyl 1,2-cyclohexanedicarboxylate are obviously improved.

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation, and in particular relates to the application and preparation method of a bimetallic catalyst for synthesizing 1,2-cyclohexanedicarboxylate from dimethyl phthalate. Background technique [0002] Plasticizers are indispensable additives in the polymer processing industry, which can greatly improve the processability, softness, fluidity and other properties of polymers. At present, more than 80% of plasticizers in the world are phthalates Plasticizers, and recent studies have shown that phthalate plasticizers are difficult to degrade due to the benzene ring structure in their molecules, and are easy to accumulate in organisms, which are likely to cause cancer, obesity and reproductive problems, and are extremely harmful to human health . With the public's emphasis on environmental protection, countries around the world have actively carried out research and development of environmental...

AI Technical Summary

Problems solved by technology

Bimetallic catalysts are usually prepared by co-impregnation or co-precipitation, but these two methods cannot disperse the active components more uniformly, and will make part of the active components be covered inside, and cannot fully develop the bimetallic catalyst. The mutual coordination effect of the two metals in the catalyst leads to a relative decrease in the catalytic activity of the catalyst

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