Bimetal composite oxide catalyst for change of methyl carbonate and phenol ester

Abstract

The invention discloses a two-metal composite oxide catalyst of synthetic biphenyl carbonate through ester exchange, which consists of vanadium oxide and copper oxide, wherein the mole ratio is that V:Cuú¢100í†1-100; The sintering temperature is between 250 and 850 deg C; the parent body can be vanadium salt or vanadium oxide and copper salt or copper oxide; the making method adapts coprecipitation method or mechanic abrasion method. The invention improves the total productivity of biphenyl carbonate, which is easy to separate and recover the biphenyl carbonate.

Description

technical field [0001] The invention belongs to a bimetallic composite oxide heterogeneous catalyst, in particular to a vanadium-copper composite metal oxide catalyst for synthesizing diphenyl carbonate by transesterification of dimethyl carbonate and phenol. Background technique [0002] Diphenyl carbonate is an important intermediate material with low toxicity and no pollution. It can be used to synthesize many important organic compounds and polymer materials, especially it can replace the highly toxic substance phosgene and bisphenol A. The production performance is excellent of polycarbonate. The current synthesis methods of diphenyl carbonate mainly include phosgene method, phenol oxidative carbonylation method, and transesterification method. Due to the use of highly toxic and highly corrosive substance phosgene, the phosgene method has seriously polluted the environment and has been gradually eliminated; although the oxidative carbonylation method has a high atom ut...

AI Technical Summary

Problems solved by technology

In DE 344552 and JP 63-92662, it is shown that the catalyst used by the author in the transesterification reaction is mostly an organic compound of Ti and Sn, such as n-butyl carbonate [Ti(OC 4 h 9 ) 4 ], dibutyl tin oxide [(C 4 h 9 )SnO], butyl tin trichloride [C 4 h 9 SnCl 3 ], aluminum phenoxide [Al(OPh) 3 ] etc., this type of homogeneous catalyst has better catalytic performance, and the yield of diphenyl carbonate is higher, but homogeneous catalyst exists in the difficult problem of product separation and recovery, and the price of organotin and titanium is more expensive

[0004] Although the homogeneous catalyst has a higher yield of diphenyl carbonate in this reaction, there are problems of separation and recovery difficulties and environmental pollution