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Method for treating dichlorobenzene rectification residues

A technology of dichlorobenzene and residues, which is applied in chemical instruments and methods, preparation of dehydrohalogenation, carbon compound catalysts, etc., can solve problems such as ineffective utilization and generation of salty wastewater, achieve good industrial application value, and improve Effect of utilization rate and mild reaction conditions

Active Publication Date: 2020-05-22
JIANGSU YANGNONG CHEM GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can realize one-step hydrodechlorination of trichlorobenzene, but the hydrogen chloride produced by dechlorination directly reacts with lye, which cannot be effectively utilized, and produces saline wastewater

Method used

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  • Method for treating dichlorobenzene rectification residues
  • Method for treating dichlorobenzene rectification residues
  • Method for treating dichlorobenzene rectification residues

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0083] The present embodiment provides a kind of method of processing dichlorobenzene rectification residue, and described method comprises the steps:

[0084] (1) Under a hydrogen atmosphere, the polychlorobenzene fraction and glycerin collected in vacuum decoking were used as reaction raw materials, and the Rh / Al 2 o 3 Under the effect of supported catalyst and acetic acid, react 1h, make the reaction product that comprises benzene, chlorinated benzene and chloropropanol; Wherein, the mass ratio of described catalyst and reaction raw material is 0.05:1, and the mass ratio of catalyst and acetic acid is 4:1, the molar ratio of glycerol to polychlorobenzene fraction is 0.5:1, the mass ratio of hydrogen to reaction raw materials is 0.009:1, the temperature of the reaction is 110°C, and the pressure is 0.2MPa;

[0085] (2) After the reaction, the temperature is lowered and the pressure is relieved to dismantle the kettle, the reaction product is separated from the catalyst, and...

Embodiment 2

[0088] The present embodiment provides a kind of method of processing dichlorobenzene rectification residue, and described method comprises the steps:

[0089] (1) Under a hydrogen atmosphere, the polychlorobenzene fraction and glycerin collected in vacuum decoking were used as reaction raw materials, and the Rh / SiO 2 Under the action of supported catalyst and n-butyric acid, react 3h, make the reaction product that comprises benzene, chlorinated benzene and chloropropanol; Wherein, the mass ratio of described catalyst and reaction raw material is 0.5:1, the ratio of catalyst and n-butyric acid The mass ratio is 2:1, the molar ratio of glycerol to polychlorobenzene fraction is 1.5:1, the mass ratio of hydrogen to reaction raw materials is 0.019:1, the temperature of the reaction is 130°C, and the pressure is 0.6MPa;

[0090] (2) After the reaction, the temperature is lowered and the pressure is relieved to dismantle the kettle, the reaction product is separated from the cataly...

Embodiment 3

[0093] The present embodiment provides a kind of method of processing dichlorobenzene rectification residue, and described method comprises the steps:

[0094](1) Under a hydrogen atmosphere, the polychlorinated benzene fraction and glycerol collected in vacuum decoking were used as reaction raw materials, and reacted for 3 hours under the action of Rh / C supported catalyst and acetic acid to obtain benzene, chlorinated benzene and chlorine The reaction product of propanol; Wherein, the mass ratio of described catalyzer and reaction raw material is 0.3:1, the mass ratio of catalyzer and acetic acid is 6:1, and the mol ratio of glycerin and polychlorobenzene fraction is 1.1:1, hydrogen and reaction The mass ratio of raw materials is 0.016:1, the temperature of the reaction is 120°C, and the pressure is 0.36MPa;

[0095] (2) After the reaction, the temperature is lowered and the pressure is relieved to dismantle the kettle, the reaction product is separated from the catalyst, and...

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Abstract

The invention provides a method for treating dichlorobenzene rectification residues. According to the method, dichlorobenzene rectification residues and glycerol which are adopted as reaction raw materials are reacted in a hydrogen atmosphere to prepare reaction products including benzene, benzene chloride and chloropropanol at the same time; the need of adding liquid caustic soda to neutralize hydrogen chloride generated in a hydrodechlorination reaction is avoided, one-step synthesis of dichloropropanol is achieved so that coproduction of epichlorohydrin is achieved. The process flow is short, the production cost is low, a post-treatment process is greatly simplified, the generation amount of three wastes is reduced, and the method has high industrial application value.

Description

[0001] This application requires that the application number is 202010070927.8, and the application date is January 21, 2020. The title of the invention is a method for treating dichlorobenzene distillation residue. The applicants are Jiangsu Yangnong Chemical Group Co., Ltd., Jiangsu Ruixiang Chemical Co., Ltd., Ningxia Priority rights of Ruitai Technology Co., Ltd., Jiangsu Ruiheng New Material Technology Co., Ltd. technical field [0002] The invention relates to the technical field of organic chemical industry, in particular to a method for treating dichlorobenzene rectification residue. Background technique [0003] Dichlorobenzene is a basic chemical raw material, which is widely used in solvents, medicines, pesticides, dyes, organic synthesis, polymer materials and other fields, and plays an important role in national economic and social development. Dichlorobenzene is divided into three types: o-dichlorobenzene, p-dichlorobenzene, and m-dichlorobenzene. The productio...

Claims

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Application Information

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IPC IPC(8): C07C1/26C07C15/04C07C17/25C07C25/06C07C17/23C07C25/02C07C29/62C07C31/36C07D301/26C07D303/08
CPCC07C1/26C07C17/25C07C17/23C07C29/62C07D301/26C07D303/08C07C2523/46C07C15/04C07C25/06C07C25/02C07C31/36Y02P20/584
Inventor 聂庆超王根林丁克鸿徐林汪洋殷剑虎陈耀坤李良善何成义
Owner JIANGSU YANGNONG CHEM GROUP
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