Azo dye coupling reaction continuous production device and azo dye coupling reaction continuous production method

A coupling reaction, azo dye technology, applied in azo dyes, monoazo dyes, feeding devices and other directions, can solve the problems of low mixing degree of raw materials, low production efficiency, large cooling energy consumption, etc., to avoid decomposition, Avoid material blockage, enhance the effect of mass transfer and heat transfer

Active Publication Date: 2018-04-27
NANJING UNIV YANCHENG ENVIRONMENTAL PROTECTION TECH & ENG RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems of low mixing degree of raw materials, low production efficiency, and high energy consumption for cooling in the prior art coupling reaction process, the purpose of the present invention is to provide a device for continuous production of azo dye coupling reaction

Method used

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  • Azo dye coupling reaction continuous production device and azo dye coupling reaction continuous production method

Examples

Experimental program
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Effect test

Embodiment 1

[0035] A continuous production device for coupling reaction of azo dyes is used for production, and the device includes a liquid-liquid jet reactor, a first tower reactor and a second tower reactor;

[0036] The liquid-liquid jet reactor is arranged at the top of the first tower reactor, and the outlet of the mixing chamber is located above the liquid level in the first tower reactor; the suction chamber and the mixing chamber of the liquid-liquid jet reactor The outer sleeve of the injector is provided with an injector jacket; the injector jacket is provided with an inlet and an outlet;

[0037] The working fluid inlet of the liquid-liquid jet reactor is connected to the mixed liquid storage tank, and the sucked fluid inlet of the liquid-liquid jet reactor is connected to the diazo component storage tank;

[0038] Both the first tower reactor and the second tower reactor are provided with a reactor jacket; the lower end of the reaction chamber jacket is provided with an inlet...

Embodiment 2

[0052] The device used in this embodiment 2 and embodiment 1 is only different in that the liquid-liquid jet reactor is provided with 5 sucked fluid inlets, and the ratio of the diameter of the mixing chamber of the liquid-liquid jet reactor to the diameter of the jet pipe nozzle is 6:1, the aperture of the tray hole is 1 / 20 of the diameter of the tray, and the opening ratio is 0.8

[0053] During production, the following steps are included:

[0054] (1) Add 341 kg (1.0 kilomole) of coupling component 1-amino-8-hydroxy-3,6-naphthalene disulfonic acid, 5115 kg of water, and 15 kg of additive sodium carbonate to the mixed liquid storage tank to become a mixed component , adding the prepared p-methoxyaniline diazonium salt containing 1.1 kilomoles to the diazo component storage tank;

[0055] (2) The heat exchange liquid ethanol is input from the inlet provided on the injector jacket and output from the outlet, and the liquid-liquid jet reactor is heat-exchanged, and the temper...

Embodiment 3

[0060] The device used in this embodiment 3 and embodiment 1 is only different in that the liquid-liquid jet reactor is provided with 3 sucked fluid inlets, and the ratio of the diameter of the mixing chamber of the liquid-liquid jet reactor to the diameter of the jet pipe nozzle is 4:1, in the first tower reactor, the aperture of the tray hole is 1 / 30 of the diameter of the tray, and the opening ratio is 0.6, in the second tower reactor, the aperture of the tray hole is 1 / 30 of the diameter of the tray 1 / 25, the opening ratio is 0.7

[0061] During production, the following steps are included:

[0062] (1) Add 341 kg (1.0 kilomole) of coupling component 1-amino-8-hydroxy-3,6-naphthalene disulfonic acid, 5115 kg of water, and 15 kg of additive sodium carbonate to the mixed liquid storage tank to become a mixed component , adding the prepared p-methoxyaniline diazonium salt containing 1.1 kilomoles to the diazo component storage tank;

[0063] (2) Input the heat exchange liqu...

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Abstract

The invention discloses an azo dye coupling reaction continuous production method and an azo dye coupling reaction continuous production device. The method includes the steps of: 1) according to certain ratio, adding a coupling component, water and an additive into a storage tank, and adding a diazo component to another storage tank; 2) according to certain ratio, respectively feeding the couplingcomponent and the diazo component, after heat exchange through a heat exchanger, into a liquid-liquid mixing reactor through pumps, and after the reactants are fully mixed and reacted, feeding the reactants into a first column reactor to perform further reaction; 3) continuously pumping a reaction material liquid into a second column reactor to perform heating crystal transformation; 4) after thecrystal transformation, continuously outputting the material liquid to a filter pressing unit through a pump. In the method, the liquid-liquid mixing reactor is a key factor of the coupling reaction,wherein through special design, reaction speed between the coupling component and the diazo component is greatly increased, meanwhile reaction heat is removed timely. The column reactors can effectively avoid back-mixing of the material liquid. The device and method achieve continuous production of the coupling reaction of the azo dyes, enhance mass transfer between the coupling component and thediazo component, and greatly reduce generation of waste water.

Description

technical field [0001] The invention belongs to the technical field of fine chemical industry, more specifically, the invention relates to a continuous production device and production method of azo dye coupling reaction. Background technique [0002] Azo dyes are the main category of organic dyes, accounting for about half of the total output of organic dyes. The production process of azo dyes mainly includes two reaction steps: diazo reaction and coupling reaction. The coupling reaction is the reaction of arylamine salt prepared by diazo reaction and coupling components such as arylamine or phenol to form azo compound. Coupling is an exothermic reaction, usually carried out in water medium, but diazonium salt is thermally unstable in water medium, so in order to avoid the decomposition of diazonium components, the temperature of the reaction liquid is usually controlled within the range of 0~5 °C. This requires a large amount of refrigeration energy consumption. In additi...

Claims

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Application Information

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IPC IPC(8): B01J19/26B01J4/00B01J19/00B01J19/24C09B29/30C09B29/33
CPCB01J4/001B01J19/0013B01J19/0053B01J19/249B01J19/26B01J2204/002B01J2219/00094B01J2219/246C09B29/30C09B29/33
Inventor 巫先坤戴建军张锋周腾腾
Owner NANJING UNIV YANCHENG ENVIRONMENTAL PROTECTION TECH & ENG RES INST
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