Method for synthesizing diphenyl carbonate by heterogeneous interesterification

Abstract

The invention discloses a method for synthesizing diphenyl carbonate by heterogeneous ester interchange. The method uses methyl carbonate and phenol as raw materials and hetero-atom mesoporous molecular sieve as a heterogeneous catalyst to synthesize the diphenyl carbonate through ester interchange. The method mainly solves the problems of difficult separation and recycling of the catalyst, low yield of the diphenyl carbonate, and the like. The hetero-atom mesoporous molecular sieve as the catalyst can be prepared through a direct synthesis method, and can also be prepared through a post synthesis method. The ester interchange product of the method has high yield and good selectivity, wherein the yield reaches 45.1 percent and the selectivity reaches 99.9 percent; and particularly the molecular sieve catalyst used by the method has the advantages of no pollution to environment, no corrosion to equipment, easy separation and recycling, and the like, and can be widely applied to production of the diphenyl carbonate.

Description

technical field [0001] The invention discloses a method for synthesizing diphenyl carbonate by heterogeneous transesterification. The method uses dimethyl carbonate and phenol as raw materials and heteroatom mesoporous molecular sieves as heterogeneous catalysts to synthesize diphenyl carbonate by transesterification. Background of the invention [0002] Diphenyl carbonate is an important chemical intermediate, which can synthesize many organic compounds and polymer materials through halogenation, nitration, hydrolysis, ammonolysis and other reactions, especially it can replace highly toxic phosgene and bisphenol A through melting ester Polycarbonate with excellent performance was synthesized by exchange reaction. At present, the synthesis of diphenyl carbonate mainly adopts phosgene method, transesterification method and oxidative carbonylation method. Due to the high toxicity and strong corrosiveness of phosgene, the traditional phosgene method has great safety and envir...

AI Technical Summary

Problems solved by technology

This type of catalyst has good catalytic performance, and the yield of diphenyl carbonate is high (34-52%), but there are problems such as catalyst and product separation and recovery difficulties

[0004] In the homogeneous catalytic reaction, the yield of diphenyl carbonate on the homogeneous catalyst is higher, but there are problems such as separation, recovery and environmental pollution

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