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Production process of p-nitroaniline

A technology for p-nitroaniline and production process, applied in the field of production technology of p-nitroaniline, can solve the problems such as the product yield needs to be improved, and achieve the effects of improving stirring effect and improving product yield

Active Publication Date: 2021-02-02
苏州市罗森助剂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Product yield of existing p-nitroaniline production method needs to be improved

Method used

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Examples

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Embodiment Construction

[0018] The specific implementation of the present invention will be further described below in conjunction with the examples. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0019] The technical scheme of concrete implementation of the present invention is:

[0020] A kind of production technology of p-nitroaniline, comprises the steps:

[0021] 1) Ammonolysis reaction of p-nitrochlorobenzene and ammonia water in the reactor produces p-nitroaniline and ammonium chloride;

[0022] 2) After the above ammonolysis reaction is completed, drain the free ammonia and part of the water in the reactor, and the discharged free ammonia and water will be absorbed by the ammonia absorption tank;

[0023] 3) Pass the material in the reaction kettle into the eluent for isolation, filter with suction, and keep the filter cake as the finished product of p-nitroani...

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PUM

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Abstract

The invention discloses a production process of p-nitroaniline, comprising the step of ammonolysis reaction of p-nitroaniline chloride and ammonia water in a reactor to generate p-nitroaniline and ammonium chloride, and the ammonolysis reaction is carried out in a stirring state Carry out; described reactor comprises: kettle body, top cover, the vertical stirring shaft that runs through top cover, be located at the stirrer inside kettle body and be connected with stirring shaft, and be located at the stirring motor of stirring shaft top; The top cover is provided with a first sliding bearing at its junction with the stirring shaft; the stirring motor is equipped with a drive mechanism for driving it to lift vertically. The production process of the p-nitroaniline of the present invention can fully mix the reactants of the ammonolysis reaction, and finally can improve the product yield.

Description

technical field [0001] The invention relates to a production process of p-nitroaniline. Background technique [0002] p-Nitroaniline is an extremely important intermediate in the dye industry. The product yield of the existing p-nitroaniline production method needs to be improved. Contents of the invention [0003] The object of the present invention is to provide a kind of production technique of p-nitroaniline, it can make the reactant of ammonolysis reaction fully mix, can improve product yield finally. [0004] In order to achieve the above object, the technical solution of the present invention is to design a kind of production technique of p-Nitroaniline, comprising the steps: [0005] 1) Ammonolysis reaction of p-nitrochlorobenzene and ammonia water in the reactor produces p-nitroaniline and ammonium chloride; [0006] 2) After the above ammonolysis reaction is completed, drain the free ammonia and part of the water in the reactor, and the discharged free ammonia...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C209/10C07C211/52B01J19/18
CPCB01J19/18C07C209/10C07C211/52
Inventor 李根荣徐新连蒋发生
Owner 苏州市罗森助剂有限公司
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