Production method for co-producing benzoyl chloride and trichlorobenzene from dichlorobenzoyl chloride

A technology for co-producing benzoyl chloride with dichlorobenzoyl chloride and a production method, which is applied in chemical instruments and methods, preparation of acid halides, preparation of organic compounds, etc. High rate and high purity effect

Inactive Publication Date: 2017-12-22
南通利奥化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the prior art, both benzoyl chloride and 1,3,5-trichlorobenzene are produced separa...

Method used

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  • Production method for co-producing benzoyl chloride and trichlorobenzene from dichlorobenzoyl chloride
  • Production method for co-producing benzoyl chloride and trichlorobenzene from dichlorobenzoyl chloride

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Embodiment 1

[0018] Present embodiment relates to a kind of production method of dichlorobenzoyl chloride coproduction benzoyl chloride and trichlorobenzene, such as figure 1 As shown, it specifically includes the following steps:

[0019] ①Synthesis

[0020] Put metered trichlorobenzyl and isophthalic acid into a 5000L synthesis kettle, slowly heat the steam jacket to 80°C, close the steam valve, and carry out the synthesis reaction under normal pressure. The reaction is an exothermic reaction. As the reaction temperature rises, the jacket is opened to circulate cooling water, the temperature is controlled at 100-105°C, and the single-batch reaction time is 6 hours; hydrogen chloride and a small amount of trichloride will be produced during feeding and heating. Benzyl chloride, benzyl dichloride, benzyl dichloride and benzyl trichloride are condensed and refluxed into the kettle through the condensing device at the top of the kettle, and a small amount is absorbed together with hydrogen ...

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Abstract

The invention provides a production method for co-producing benzoyl chloride and trichlorobenzene from dichlorobenzoyl chloride. The method comprises the following steps: enabling trichlorobenzene and m-phthalic acid to react at the temperature of 80 DEG C so as to obtain benzoyl chloride and m-phthaloyl chloride; enabling m-phthaloyl chloride and chlorine to react at the temperature of 80 DEG C so as to obtain 5-chloro isophthaloyl dichloride; and carrying out a rearrangement reaction on the 5-chloro isophthaloyl dichloride at the temperature of 250 DEG C, thereby obtaining 3,5-dichlorobenzoyl chloride and the by-product, 1,3,5-trichloro-benzene. Compared with the prior art, the production method disclosed by the invention has the beneficial effects of high product yield, high purity and high production efficiency.

Description

technical field [0001] The invention relates to a production method for co-producing benzoyl chloride and trichlorobenzene with dichlorobenzoyl chloride, belonging to the technical field of organic synthesis. Background technique [0002] Benzoyl chloride, a colorless liquid with a pungent odor. Soluble in ether, chloroform and benzene. When meeting with water or ethanol, it gradually decomposes to generate benzoic acid or ethyl benzoate and hydrogen chloride. Benzoyl chloride is an important intermediate for the preparation of dyes, fragrances, organic peroxides, medicines and resins. 1,3,5-Trichlorobenzene, long needle crystal. The melting point is 63.5°C, the flash point is 126°C, and the boiling point is 208.5°C. Has a special smell. Insoluble in water, slightly soluble in ethanol, easily soluble in ether. For organic synthesis, insecticide and dye synthesis. In the prior art, both benzoyl chloride and 1,3,5-trichlorobenzene are produced separately, and there is n...

Claims

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Application Information

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IPC IPC(8): C07C63/10C07C51/58C07C51/60C07C63/24C07C51/62C07C63/68C07C63/70C07C17/363C07C25/10
CPCC07C17/363C07C51/58C07C51/60C07C51/62C07C63/10C07C63/24C07C63/68C07C63/70C07C25/10
Inventor 陈培杨志刚卫亚军于蓓蓓
Owner 南通利奥化工科技有限公司
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