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Method for preparing diphenyl carbonate through phenol ester exchange

A technology of diphenyl carbonate and dimethyl carbonate, which is applied in the field of phenol transesterification to prepare diphenyl carbonate, can solve the problem of low catalyst reactivity, achieve no obvious decline in activity, good technical effect, high reactivity and selectivity sexual effect

Active Publication Date: 2019-04-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the invention is to solve the problem of low catalyst reactivity in the synthesis of diphenyl carbonate in the prior art, and develop a method for preparing diphenyl carbonate by transesterification of phenol

Method used

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  • Method for preparing diphenyl carbonate through phenol ester exchange

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Take 50ml of tetrabutyl titanate and put it into a dry hydrothermal kettle, add 4ml of HF aqueous solution, seal the reaction kettle and overnight at 160°C for 24h, cool to room temperature, centrifuge, wash 5 times with 0.1M NaOH, and spend overnight at 110°C A sample can be obtained after drying, which is designated as sample T1, and its (001) crystal plane exposure ratio is about 30%.

Embodiment 2

[0033] Take 50ml of tetrabutyl titanate and put it into a dry hydrothermal kettle, add 6ml of HF aqueous solution, seal the reaction kettle and overnight at 160°C for 24h, cool to room temperature, centrifuge, wash 5 times with 0.1M NaOH, and spend overnight at 110°C A sample can be obtained after drying, which is designated as sample T2, and its (001) crystal plane exposure ratio is about 40%.

Embodiment 3

[0035] Take 50ml of tetrabutyl titanate and put it into a dry hydrothermal kettle, add 12ml of HF aqueous solution, seal the reaction kettle and overnight at 160°C for 24h, cool to room temperature, centrifuge, wash 5 times with 0.1M NaOH, and spend overnight at 110°C After drying, a sample can be obtained, which is designated as sample T3, and its (001) crystal plane exposure ratio is about 70%.

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Abstract

The invention relates to a method for preparing diphenyl carbonate through dimethyl carbonate and phenol ester exchange reaction. The method mainly solves the problem of low activity of a heterogeneous catalyst in the prior art. A catalyst used in the method is titanium oxide with a (001) crystal face exposed at a high ratio. By means of the technical scheme, the activity and selectivity of the catalyst are effectively improved, the problem of low activity of the catalyst in the reaction of synthesizing the diphenyl carbonate through phenol and dimethyl carbonate ester exchange is well solved,and the method can be used for industrial production of the diphenyl carbonate.

Description

technical field [0001] The invention relates to a method for preparing diphenyl carbonate by transesterification of phenol. Background technique [0002] Diphenyl carbonate (DPC) is a raw material for the preparation of polycarbonate by non-phosgene method. The traditional preparation method is phosgene method, which is subject to policy restrictions due to the potential harm of highly toxic phosgene to the environment and safe production. The process of synthesizing diphenyl carbonate by transesterification of phenol (PhOH) and dimethyl carbonate (DMC) under the action of a catalyst avoids the use of highly toxic raw material phosgene, and the main by-product methanol can also be recycled for the starting raw material carbonic acid The synthesis of dimethyl ester is the most promising green process route for industrialization. [0003] At present, the transesterification of dimethyl carbonate and phenol to synthesize diphenyl carbonate mostly uses homogeneous catalysts. N...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C69/96C07C68/06B01J21/06B01J37/10
CPCC07C68/06B01J21/063B01J37/10B01J35/30C07C69/96
Inventor 戈军伟何文军
Owner CHINA PETROLEUM & CHEM CORP
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