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Method and device for automatic-control continuous production of dye

A production method and production device technology, which can be used in azo dyes, organic dyes, monoazo dyes, etc., and can solve problems such as precise control and description

Active Publication Date: 2013-06-19
ZHEJIANG DIBANG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method and device have overcome some defectives of intermittent primary aromatic amine diazotization, have avoided the decomposition of diazonium salt caused by too high local temperature, yet, this method and device have not the continuous preparation process of diazonium salt accurate control is described, therefore, this method and device still need to be improved

Method used

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  • Method and device for automatic-control continuous production of dye
  • Method and device for automatic-control continuous production of dye
  • Method and device for automatic-control continuous production of dye

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] Put 1980kg of N,N-diethyl-3-acetamidoaniline into the beating pot of the coupling component, and beat with 20000kg of beating liquid with a mass percentage of 3% sulfuric acid to obtain the coupling component solution X, which is ready for use.

[0067] Add 420kg of nitrosyl sulfuric acid (28% by mass) to the batching kettle A1, turn on the frozen brine, control the temperature in the kettle at 20°C to 30°C, and slowly twist in 2,4-dinitro-6- Mix 200kg of chloroaniline (diazo component) to make an initiator, open the feed valves of 2,4-dinitro-6-chloroaniline (diazo component) and nitrosyl sulfuric acid, and pass the metering device respectively Control the feeding speed at 571kg / h and 1200kg / h for automatic continuous feeding, and the mixed material flows from the overflow port to the tubular reactor G1 for reaction. After the polarity voltage control system detects that the reaction is completed, the reaction material (weight Nitrogen compound solution) flows to the t...

Embodiment 2

[0074] Put 700kg of N,N-diethyl-3-acetamidoaniline into the beating pot of the coupling component, beat with 15000kg of beating liquid with a mass percent of sulfuric acid of 4.5%, and obtain the coupling component solution X, which is ready for use. Add 380kg of nitrosyl sulfuric acid (28% by mass) and 660kg of sulfuric acid to the batching kettle A1, turn on the frozen brine, control the temperature in the kettle at 0°C to 5°C, and slowly twist in 2-cyano-4 -200kg of nitro-6-bromoaniline is mixed to form an initiator, after the preparation is completed, open the feed valves of 2-cyano-4-nitro-6-bromoaniline (diazo component), sulfuric acid and nitrosyl sulfuric acid , the three are measured and controlled at 300kg / h, 990kg / h, and 570kg / h for automatic continuous feeding, and the mixed material flows from the overflow port to the tubular reactor G1 for reaction, and the reaction is completed by the polarity voltage control system. Finally, the reaction material (diazo compoun...

Embodiment 3

[0079] Put 2050kg of 3-(N,N-diallyl)amino-4-methoxyacetanilide in the beating pot of the coupling component, and beat with 20000kg of sulfuric acid with a mass percentage of 6% to obtain the coupling component Divide solution X and set aside.

[0080] Add 690kg of nitrosyl sulfuric acid (28% by mass) to the batching kettle A1, turn on the frozen brine, control the temperature in the kettle at 20°C to 30°C, and slowly twist in 2,4-dinitro-6- 330kg of bromoaniline was mixed and prepared as an initiator. After the preparation was completed, the feed valves of 2,4-dinitro-6-bromoaniline (diazo component) and nitrosyl sulfuric acid were opened, and the metering of the two was controlled at 495kg / h respectively. , 1035kg / h for continuous feeding, the mixed material flows from the overflow port to the tubular reactor G1 for reaction, after the polarity voltage control system detects that the reaction is completed, the diazo compound solution flows to the transfer tank D1, and passes ...

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Abstract

The invention discloses a method and a device for automatic-control continuous production of dye. The method comprises that raw materials are metered, are continuously fed into a tubular reactor and undergo a reaction and the products are discharged continuously. The device is characterized in that a reactor is provided with multiple reaction state detection devices; through multipoint automatic control, the reaction liquid obtained by the reaction is timely transferred to a next process; and abnormal materials in blending are timely pumped back to a blending kettle and then are re-blended. The method and the device realize accurate and automatic-control continuous production of dye, guarantee stable product quality, shorten production time, improve production efficiency, reduce a production cost, reduce three wastes, realize pollution and energy consumption reduction, and realize recycling economy and clean production.

Description

technical field [0001] The invention relates to an automatic control continuous production method and device for dyes. Background technique [0002] The dye industry is one of the industries with the longest history in the fine chemical industry. In recent years, with the development of my country's light textile industry, the dye industry has also developed rapidly; especially since the beginning of the new century, my country's dye industry has developed more rapidly, and its output, export volume and consumption have all ranked first in the world. However, at present, the production methods of dyestuffs in our country are still relatively backward, automatic control technology has not been applied in the dyestuff production process, and the comprehensive automation level of enterprises is generally low. Therefore, improving the level of automation in this field has always been an unremitting goal pursued by people in the industry. [0003] As we all know, the preparatio...

Claims

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Application Information

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IPC IPC(8): C09B67/36C09B29/085
Inventor 徐万福傅伟松陈华祥唐智勇徐斌
Owner ZHEJIANG DIBANG CHEM
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