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

A composite oxide, diphenyl carbonate technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, preparation of organic carbonates, etc., can solve environmental pollution, product separation and recovery difficulties, Difficulty in separation and recovery, etc., to achieve the effect of no environmental pollution, high catalytic activity and good stability

Active Publication Date: 2006-07-19
CHENGDU ORGANIC CHEM CO LTD CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 perfor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Take 2g NH 4 VO 3 , add 20ml distilled water, then add 2ml 25% ammonia water, be mixed with solution; Get 2.044g basic copper carbonate in addition, make V / Cu (molar ratio)=1 / 1, add 20ml distilled water, be made into solution; The solutions were mixed and stirred, and the solution was evaporated to a sol state; the mixed product was dried in an oven at 110°C for 4 hours, and calcined in a muffle furnace at 550°C for 8 hours to obtain a bimetallic composite oxide catalyst. In a three-necked beaker connected with a nitrogen inlet tube, a constant pressure dropping funnel, a thermometer and a rectification column, add 0.45 g of the prepared catalyst and 15 g of phenol. When the temperature rises to 175°C, start to add dimethyl carbonate dropwise. The total amount of dimethyl carbonate added is 13.5ml. Calculate the reaction time from the start of adding dimethyl carbonate dropwise, and react for 9 hours; Azeotrope of Methanol and Dimethyl Carbonate. The mixed fraction a...

Embodiment 2

[0032] The preparation method of the catalyst is the same as in Example 1, and the molar ratio of vanadium and copper is adjusted to make V / Cu=1 / 0.5. The analysis method of reaction condition and product is the same as embodiment 1, and the activity result of catalyst is as follows: the conversion ratio of phenol is 28.39%, and the productive rate of methylphenyl carbonate and diphenyl carbonate is respectively 15.99% and 11.3%.

Embodiment 3

[0034]The preparation method of the catalyst is the same as in Example 1, and the molar ratio of vanadium and copper is adjusted to make V / Cu=1 / 0.25. The analysis method of reaction condition and product is the same as embodiment 1, and the activity result of catalyst is as follows: the conversion rate of phenol is 34.52%, and the productive rate of methylphenyl carbonate and diphenyl carbonate is respectively 16.81% and 16.64%.

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PUM

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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...

Claims

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Application Information

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IPC IPC(8): B01J23/847C07C68/06C07C69/96
Inventor 王公应童东绅曾毅王越姚洁陈彤
Owner CHENGDU ORGANIC CHEM CO LTD CHINESE ACAD OF SCI
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