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Simple and efficient production method for phenyl chloroformate

A technology for the production of phenyl chloroformate, which is applied in the preparation of phosgene or haloformate, organic chemistry, etc., can solve the problems of low production efficiency, achieve easy control, shorten the reaction time, and reduce the by-product dicarbonate The effect of phenyl esters

Inactive Publication Date: 2016-09-21
ANHUI GUANGXIN AGROCHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] But existing technology also has by-product production, and production efficiency is also relatively low simultaneously, promptly in production process, phenol can produce by-product diphenyl carbonate (DPC) under the condition of high temperature and acid-binding agent with product phenyl chloroformate ,Right now

Method used

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  • Simple and efficient production method for phenyl chloroformate

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Firstly, phenol is processed into a molten state for subsequent use;

[0023] Secondly, the above-mentioned phenol is transferred to the phenol spray tank, the catalyst is transferred to the catalyst spray tank, the phenol spray tank is arranged above the reaction tank, the catalyst spray tank is arranged on one side of the reaction tank, and the catalyst spray tank and the phenol spray tank The liquid outlets at the bottom of the tank are all connected to the liquid outlet pipe, and the liquid outlet end of the liquid outlet pipe is provided with a nozzle, and the nozzle of the catalyst spray tank is arranged in the middle of the inner wall of the reaction tank, and the nozzle of the catalyst spray tank faces the middle of the reaction tank. In the upper part, the nozzle of the phenol spray tank is arranged on the top in the reaction tank, the middle part of the reaction tank is provided with a phosgene air inlet, and one side of the reaction tank is connected to a circ...

Embodiment 2

[0033] Firstly, phenol is processed into a molten state for subsequent use;

[0034] Secondly, the above-mentioned phenol is transferred to the phenol spray tank, the catalyst is transferred to the catalyst spray tank, the phenol spray tank is arranged above the reaction tank, the catalyst spray tank is arranged on one side of the reaction tank, and the catalyst spray tank and the phenol spray tank The liquid outlets at the bottom of the tank are all connected to the liquid outlet pipe, and the liquid outlet end of the liquid outlet pipe is provided with a nozzle, and the nozzle of the catalyst spray tank is arranged in the middle of the inner wall of the reaction tank, and the nozzle of the catalyst spray tank faces the middle of the reaction tank. In the upper part, the nozzle of the phenol spray tank is arranged on the top in the reaction tank, the middle part of the reaction tank is provided with a phosgene air inlet, and one side of the reaction tank is connected to a circ...

Embodiment 3

[0044] Firstly, phenol is processed into a molten state for subsequent use;

[0045]Secondly, the above-mentioned phenol is transferred to the phenol spray tank, the catalyst is transferred to the catalyst spray tank, the phenol spray tank is arranged above the reaction tank, the catalyst spray tank is arranged on one side of the reaction tank, and the catalyst spray tank and the phenol spray tank The liquid outlets at the bottom of the tank are all connected to the liquid outlet pipe, and the liquid outlet end of the liquid outlet pipe is provided with a nozzle, and the nozzle of the catalyst spray tank is arranged in the middle of the inner wall of the reaction tank, and the nozzle of the catalyst spray tank faces the middle of the reaction tank. In the upper part, the nozzle of the phenol spray tank is arranged on the top in the reaction tank, the middle part of the reaction tank is provided with a phosgene air inlet, and one side of the reaction tank is connected to a circu...

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Abstract

The invention provides a simple and efficient production method for phenyl chloroformate. The production method comprises the following steps that firstly, phenol is treated into a molten state for use; secondly, phenol is transferred into a phenol spray tank, and a catalyst is transferred into a catalyst spray tank; thirdly, a circulating refrigerating machine is started, then a temperature control pipeline is controlled, a reaction tank is heated, phosgene is introduced into the reaction tank continuously, then the phenol spray tank is started, stirring is started, the catalyst spray tank is started, and central control samples are taken; finally, gas dispelling is carried out on the reaction tank with nitrogen, and phenyl chloroformate is obtained through reduced pressure distillation. Compared with an existing production technology, by means of the simple and efficient production method for phenyl chloroformate, the reaction time is shortened, and the purity and the reaction efficiency are improved.

Description

technical field [0001] The invention relates to the field of fine chemical production, in particular to a simple and efficient production method of phenyl chloroformate. Background technique [0002] Phenyl chloroformate is an important fine chemical intermediate, which is widely used in chemical synthesis and can be used as a polymerization catalyst, plastic modifier, fiber treatment agent, and intermediate of medicine and pesticide. [0003] The main synthesis method of phenyl chloroformate is the phosgene method. Dissolve phenol in chloroform, pass through phosgene under cooling, make the ratio of the absorbed phosgene amount to phenol and other substances, and add other substances dropwise under stirring at 5-10°C The amount of N,N-dimethylaniline. Then dilute with cold water, separate the oil layer, and wash with dilute hydrochloric acid and water successively. After drying with anhydrous calcium chloride, distill to recover chloroform, and then rectify under reduced ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C68/02C07C69/96
CPCC07C68/02
Inventor 黄金祥过学军吴建平胡明宏杨亚明程伟家李红卫徐小兵高焰兵戴玉婷
Owner ANHUI GUANGXIN AGROCHEM
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