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Novel chlorobenzene production process

A production process, the technology of chlorinated benzene, applied in the direction of organic chemistry, chemical instruments and methods, preparation of halogenated hydrocarbons, etc., can solve the problems of increasing environmental treatment costs, corrosion of equipment and pipelines, increasing production costs, etc., to achieve mature and reliable production processes , The effect of prolonging the service life of the equipment and saving the synthesis cost

Inactive Publication Date: 2018-12-28
ANHUI DONGZHI GUANGXIN AGROCHEMICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, water washing and alkali washing will produce a large amount of waste water, which will affect product quality, cause corrosion to equipment and pipelines, and be difficult to handle, which not only increases production costs, but also may cause pollution to the environment and increase the cost of environmental governance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The chlorinated benzene in this embodiment includes the following raw materials: anhydrous benzene, chlorine gas, catalyst, positioning agent, wherein, the molar ratio of anhydrous benzene to chlorine gas is 1.8:0.7, and the catalyst accounts for 0.9% of the total weight of anhydrous benzene and chlorine gas. The agent accounts for 0.08% of the total weight of anhydrous benzene and chlorine, and the new production process includes the following steps:

[0026] S1, using the azeotropic drying method to carry out anhydrous treatment on industrial pure benzene to obtain anhydrous benzene for subsequent use;

[0027] S2, anhydrous benzene flows out from the bottom of the benzene high level tank and is continuously added to the chlorinator from the bottom of the chlorinator after being measured by a flow meter;

[0028] S3, the qualified chlorine gas after the vaporization of liquid chlorine is buffered through the chlorine gas buffer tank, then the pressure and flow are adj...

Embodiment 2

[0032] The chlorinated benzene in this embodiment includes the following raw materials: anhydrous benzene, chlorine gas, catalyst, positioning agent, wherein the molar ratio of anhydrous benzene to chlorine gas is 2.5:1.3, and the catalyst accounts for 1.3% of the total weight of anhydrous benzene and chlorine gas. The agent accounts for 0.15% of the total weight of anhydrous benzene and chlorine, and the new production process includes the following steps:

[0033] S1, using the azeotropic drying method to carry out anhydrous treatment on industrial pure benzene to obtain anhydrous benzene for subsequent use;

[0034] S2, anhydrous benzene flows out from the bottom of the benzene high level tank and is continuously added to the chlorinator from the bottom of the chlorinator after being measured by a flow meter;

[0035] S3, the qualified chlorine gas after the vaporization of liquid chlorine is buffered through the chlorine gas buffer tank, then the pressure and flow are adju...

Embodiment 3

[0039]The chlorinated benzene in this embodiment includes the following raw materials: anhydrous benzene, chlorine gas, catalyst, and positioning agent, wherein the molar ratio of anhydrous benzene to chlorine gas is 2.1:1, and the catalyst accounts for 1% of the total weight of anhydrous benzene and chlorine gas. The agent accounts for 0.1% of the total weight of anhydrous benzene and chlorine, and the new production process includes the following steps:

[0040] S1, using the azeotropic drying method to carry out anhydrous treatment on industrial pure benzene to obtain anhydrous benzene for subsequent use;

[0041] S2, anhydrous benzene flows out from the bottom of the benzene high level tank and is continuously added to the chlorinator from the bottom of the chlorinator after being measured by a flow meter;

[0042] S3, the qualified chlorine gas after the vaporization of liquid chlorine is buffered through the chlorine gas buffer tank, then the pressure and flow are adjust...

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Abstract

The invention provides a novel chlorobenzene production process. Chlorobenzene used in the novel chlorobenzene production process comprises the following raw materials: anhydrous benzene, chlorine, acatalyst and a positioning agent. The novel production process comprises the following steps: preparing the anhydrous benzene; enabling the anhydrous benzene to flow out from the bottom of a benzene high-level tank, metering by using a flowmeter, and continuously putting into a chlorinator from the bottom of the chlorinator; buffering qualified chlorine made after gasification of liquid chlorine by using a chlorine buffer tank, introducing into the chlorinator from the bottom of the chlorinator to flow upwards together with the anhydrous benzene along flows in a same direction, carrying out areaction under the action of the catalyst and the positioning agent in the chlorinator so as to generate a chlorination liquid, and carrying out aftertreatment on the chlorination liquid, thereby obtaining chlorobenzene. By adopting the novel production process provided by the invention, the problem that a great deal of wastewater is generated from water washing and alkali washing in the conventional method can be avoided, no wastewater is generated, in addition, the catalyst is long in service life, the equipment is long in service life, the detection cycle can be prolonged, a product made byusing the process is high in purity, and due to adoption of an iron catalyst and chelate EDTA-Fe with iron as the center as the positioning agent, the process is low in wastewater generation rate andgreen, environmentally friendly and fee of pollution.

Description

technical field [0001] The invention relates to the technical field of pesticide synthesis, in particular to a novel production process of chlorinated benzene. Background technique [0002] Chlorobenzene, also called chlorobenzene, is a colorless, transparent, volatile liquid with a bitter almond smell. Melting point -45.6°C, boiling point 131.6°C, relative density 1.107 (20 / 4°C), refractive index 1.5248, flash point 23°C, autoignition point 637.78°C, flammable. The explosion limit in air is 1.83-9.23% (volume). Insoluble in water, easily soluble in alcohol, ether, benzene and chloroform, etc. Toxic, moderately toxic. [0003] Chlorinated benzene is an important basic organic synthesis raw material, used as dyes, medicines, pesticides, and organic synthesis intermediates. It is used in the manufacture of phenol, nitrochlorobenzene, dinitrochlorobenzene, aniline, nitrophenol and the pesticide DDT, etc. It is also used as a solvent for ethyl cellulose and many resins. In ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C17/12C07C25/06
CPCC07C17/12C07C25/06
Inventor 陈永贵黄中桂蔡小林袁晓林杨镭王先武罗立忠袁树林章子虎张俊丁锐
Owner ANHUI DONGZHI GUANGXIN AGROCHEMICAL CO LTD
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