Preparation process and system of o-chlorobenzonitrile

A technology of o-chlorobenzonitrile and preparation process, which is applied in the preparation of halogenated hydrocarbons, the preparation of hydrocarbon ammoxidation, the purification/separation of carboxylic acid nitrile, etc., can solve problems such as potential safety hazards, temperature rise, pressure increase, etc., and achieve the effect of avoiding danger

Inactive Publication Date: 2021-01-08
HUBEI SHANSHUI CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the ammoniation reaction process, zinc oxide or magnesium oxide is often used as a catalyst, but in actual operation, it is found that the reaction is in an unstable state, such as sudden temperature rise and pressure increase, which pose a great safety hazard

Method used

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  • Preparation process and system of o-chlorobenzonitrile
  • Preparation process and system of o-chlorobenzonitrile
  • Preparation process and system of o-chlorobenzonitrile

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Embodiment 1 is the system that prepares o-chlorobenzonitrile with o-chlorobenzonitrile as raw material

[0050] Including: sequentially connected ammoniation unit (B) and purification unit (C), the ammoniation unit (B) can realize the ammoniation reaction of o-chlorotrichlorotoluene, and the purification unit washes and distills the crude product obtained from the ammoniation reaction After the product is obtained, the ammoniation unit (B) is connected with the purification unit (C), and the crude product obtained in the ammoniation reaction can be transported to the purification unit (C) for processing, and the conventional reaction device and connection device in the art can be used to achieve the purpose .

[0051] In this embodiment, the ammoniation unit (B) includes an ammoniation reaction tank (2), and the purification unit (C) includes a water washing tank (4) and a distillation unit (5) connected in sequence, and the distillation unit (5) ) includes a distilla...

Embodiment 2

[0055] Embodiment 2 is the system that prepares o-chlorobenzonitrile with o-chlorotoluene as raw material

[0056] In this embodiment, on the basis of Embodiment 1, a chlorination unit (A) is connected before the ammoniation unit.

[0057]For realizing continuous uninterrupted reaction, in this implementation, described chlorination unit (A) comprises three chlorination stills (1) connected in series, and each described chlorination still (1) is connected with described ammoniation unit ( B) Connection, specifically in this embodiment, connection with the ammoniation reactor (1) in the ammoniation unit (B).

[0058] Each said chlorination kettle (1) comprises a chlorination reactor body (101) and an ultraviolet lamp (102) located in the said chlorination reactor body (101), so that in the chlorination reactor (1) A photocatalytic chlorination reaction is carried out.

[0059] The ultraviolet lamp includes an ultraviolet light source and a quartz ultraviolet lamp shell arrang...

Embodiment 3

[0060] Embodiment 3 is the system that prepares o-chlorobenzonitrile with o-chlorotoluene as raw material

[0061] The ultraviolet lamp of chlorination kettle in embodiment 2 is replaced with 400W high-pressure mercury lamp.

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Abstract

The invention provides a preparation process and system of o-chlorobenzonitrile. The preparation process of o-chlorobenzonitrile comprises the steps: mixing o-chlorobenzotrichloride and ammonium chloride, and carrying out ammoniation reaction under the catalysis of copper oxide to obtain o-chlorobenzonitrile. Compared with the prior art, the method has the beneficial effects that copper oxide is used as a catalyst, so that the whole reaction process can be in a stable state, and dangers caused by violent temperature rise are avoided.

Description

technical field [0001] The invention belongs to the field of chemical industry, and in particular relates to a preparation process and system of o-chlorobenzonitrile. Background technique [0002] At present, there are mainly 6 different raw material routes for the synthesis of o-chlorobenzonitrile (CBN), which are: o-chlorotoluene as raw material, o-chlorobenzaldoxime as raw material, o-chlorobenzaldehyde as raw material, o-chlorobenzaldehyde as raw material, and o-chlorobenzaldehyde as raw material. Synthetic routes of benzoic acid as raw material, o-chloroaniline as raw material and o-chlorobenzylamine as raw material. [0003] Wherein, the process steps of synthesizing o-chlorobenzonitrile with o-chlorotoluene as raw material include ammoxidation and cyanidation of nitrosyl chloride. Using o-chlorotoluene as a raw material, it is first chlorinated into o-chlorobenzonitrile, and then undergoes a transition metal-catalyzed ammoniation reaction to obtain o-chlorobenzonitri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C255/50C07C253/28C07C253/34
CPCC07C253/28C07C253/34C07C17/14
Inventor 曾晓兵曾云
Owner HUBEI SHANSHUI CHEM
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