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Method for preparing carbonic acid diaryl ester

A technology of diaryl carbonate and benzothiadiazole, applied in the field of preparation of diaryl carbonate, can solve the problems of low reaction efficiency and high reaction pressure

Inactive Publication Date: 2014-12-31
CHINA PETROCHEM DEVMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the reaction pressure of the above two is as high as 80-90Kg / cm 2 And the reaction efficiency is not high

Method used

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  • Method for preparing carbonic acid diaryl ester
  • Method for preparing carbonic acid diaryl ester
  • Method for preparing carbonic acid diaryl ester

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-5

[0030] Repeat the step of comparative example, but add different organic cocatalysts, and make the mol ratio of organic cocatalyst and catalyst be 1: 1, the result is as shown in table 1, shows that the productive rate of palladium chloride catalyst collocation different cocatalysts is all with varying degrees of improvement.

[0031] Table 1 Different organic co-catalysts improve the efficiency of diphenyl carbonate productive rate

[0032]

Embodiment 6-7

[0034] Repeat the step of comparative example, add organic co-catalyst to be 2,1,3-benzothiadiazole, and react under different reaction pressures, the result is as shown in table 2, shows that after adding organic co-catalyst of the present invention , under different pressures, it can still maintain a higher yield than the original system.

[0035] The impact of table 2 pressure on the generation of diphenyl carbonate

[0036]

Embodiment 8-9

[0038] Repeat the step of comparative example, add organic cocatalyst to be 2,1,3-benzothiadiazole, and react under different reaction temperatures, the result is as shown in table 3, shows that after adding organic cocatalyst of the present invention , at different temperatures, it can still maintain a higher yield than the original system.

[0039] Table 3 The influence of temperature on the formation of diphenyl carbonate

[0040]

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Abstract

The present invention relates to a method for preparing carbonic acid diaryl ester, which uses phenols, carbon monoxide and oxygen to perform oxidation carbonylation reaction to compound carbonic acid diaryl ester, especially uses phenol to compound diphenyl carbonate. The preparing method is characterized by using a catalyzing system formed by a metal halide catalyst and a promoter for one or more nitrogen heterocyclic ring compounds, thereby increasing percent conversion, selectivity and productivity of the catalytic reaction.

Description

technical field [0001] The present invention relates to a kind of preparation method of diaryl carbonate, it is by oxidative carbonylation reaction of phenols and carbon monoxide and oxygen to synthesize diaryl carbonate, especially synthesize diphenyl carbonate by phenol. Background technique [0002] Diphenyl Carbonate (Diphenyl Carbonate, DPC) is an organic compound with low toxicity and no pollution, and is an important engineering plastic intermediate, which can be used in the synthesis of many important medicines, pesticides, other organic compounds and polymer materials, such as mono Isocyanate, diisocyanate, polycarbonate, polyparacarbonyl benzoate, polyaryl carbonate, etc., can also be used as plasticizers and solvents for polyamides and polyesters. [0003] At present, there are mainly three methods for synthesizing diphenyl carbonate, namely phosgene method, transesterification method and phenol oxidative carbonylation method. The phosgene method is the earliest ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C69/96C07C68/00B01J31/30
Inventor 黄振玮张芷维蔡嘉荣
Owner CHINA PETROCHEM DEVMENT
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