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Preparation method for disperse red 343:1 dye

A technology of disperse red and dyes, which is applied in the direction of azo dyes, organic dyes, monoazo dyes, etc., which can solve the problems of environmental hazards and difficult waste water treatment, and reduce the possibility of waste water discharge and harm to people and the environment , High light fastness effect

Inactive Publication Date: 2015-03-11
ZHEJIANG HUADIE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the cyanation reaction of a large amount of highly toxic cyanide used in production, a large amount of toxic and harmful wastewater will be produced, and these wastewaters are not easy to treat, causing serious harm to the environment

Method used

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  • Preparation method for disperse red 343:1 dye
  • Preparation method for disperse red 343:1 dye

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) In a 1000ml three-necked flask with a stirring device, add 18 grams of water, add 36 grams of sulfuric acid at 25 ° C and stir, and cool down with salt water; dropwise add 15 grams of nitrosyl sulfuric acid when the temperature drops to -2 ° C, After dropping, 10 g of 2-amino-5,6-dichlorobenzothiazole was added at 2°C, stirred at 8°C for 2 hours, and left to stand to obtain the diazonium salt.

[0025] (2) In a 1000ml beaker, add 50 grams of water, 20 grams of glacial acetic acid, 0.2 grams of sulfamic acid, and add 0.2 grams of N-ethyl-N-benzoyloxyethyl m-toluidine (content 60%) 18 g, add ice and cool down to 0°C, press into the above diazonium salt, and slowly couple.

[0026] (3) After the coupling is completed, stir for 2 hours, add water to raise the temperature to 65° C., and keep the temperature for 3 hours.

[0027] (4) Press filtration, wash with water until neutral, obtain 34.5 grams of disperse red 343:1 dye filter cake, the yield is 92.5%.

[0028] (5)...

Embodiment 2

[0030] (1) In a 1000ml three-necked flask with a stirring device, add 20 grams of water, add 40 grams of sulfuric acid at 30°C and stir, and cool down with brine; when the temperature drops to 0°C, add 18 grams of nitrosyl sulfuric acid dropwise, After that, 20 g of 2-amino-5,6-dichlorobenzothiazole was added at 5°C, stirred at 9°C for 2 hours, and left to stand to obtain the diazonium salt.

[0031] (2) In a 1000ml beaker, add 55 grams of water, 25 grams of glacial acetic acid, 0.4 grams of sulfamic acid, and add 0.4 grams of N-ethyl-N-benzoyloxyethyl m-toluidine (content 60%) 22 g, add ice and cool down to 2°C, press into the above diazonium salt, and slowly couple.

[0032] (3) After the coupling is completed, stir for 2 hours, add water to raise the temperature to 68° C., and keep the temperature for 3 hours.

[0033] (4) Press filtration, wash with water until neutral, obtain 39.3 grams of disperse red 343:1 dye filter cake, yield 93.1%.

[0034] (5) Take 20 grams of dy...

Embodiment 3

[0036] (1) In a 1000ml three-necked flask with a stirring device, add 22 grams of water, add 44 grams of sulfuric acid at 35°C and stir, and cool down with brine; when the temperature drops to 4°C, add 20 grams of nitrosyl sulfuric acid dropwise, After that, 30 g of 2-amino-5,6-dichlorobenzothiazole was added at 10° C., stirred at 10° C. for 2 hours, and left to stand to obtain the diazonium salt.

[0037] (2) In a 1000ml beaker, add 60 grams of water, 30 grams of glacial acetic acid, 0.6 grams of sulfamic acid, and add 0.6 grams of N-ethyl-N-benzoyloxyethyl m-toluidine (content 60%) 26 g, add ice and cool down to 5°C, press into the above diazonium salt, and slowly couple.

[0038] (3) After the coupling is completed, stir for 2 hours, add water to raise the temperature to 70° C., and keep the temperature for 3 hours.

[0039] (4) Press filtration, wash with water until neutral, obtain 37.5 grams of disperse red 343:1 dye filter cake, yield 92.8%.

[0040] (5) Take 20 grams...

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Abstract

The invention discloses a preparation method for disperse red 343:1 dye. The preparation method comprises the following steps: 1) diazotization, to be specific, adding water into a reaction kettle, cooling with cooling water, adding sulfuric acid, and then, dropwise adding nitrosyl sulfuric acid; after completing adding the nitrosyl sulfuric acid, adding 2-amino-5, 6-dichloro benzothiazole, stirring, and performing standing to obtain diazonium salt; 2) coupling, to be specific, adding water, glacial acetic acid, sulfamic acid and peregal into a coupling bucket, adding N-ethyl-N-benzoyloxy ethyl m-toluidine, adding ice for cooling, pressing-in the diazonium salt, and coupling; 3) after completing the coupling, and adding water for heating; 4) performing press-filtering, and washing, so as to obtain dye filter cakes; 5) mixing the dye filter cakes and an auxiliary agent, so as to obtain the disperse red 343:1 dye. According to the invention, the disperse red 343:1 dye serves as a substitute object of disperse red 343, the preparation technology is simple, only one-time coupling reaction is performed, the process route is shortened, the waste water discharge is greatly reduced, the yield is increased, the cyanation reaction adopting plenty of virulent cyanide is avoided, the possibility for harming human beings and the environment is reduced, and the finally prepared disperse red 343:1 dye is high in light fastness and can meet the use requirements of textiles on high-solarization dye.

Description

technical field [0001] The invention relates to the field of preparation of disperse dyes, in particular to a preparation method of disperse red 343:1 dye. Background technique [0002] As a disperse dye, disperse red 343 is often used in the dyeing of polyester and polyester blended textiles. Disperse red 343 is often used in conventional carrier dyeing, high temperature and high pressure dyeing and hot melt dyeing. 343 dye, articles dyed with disperse red 343 dye have bright color, good level dyeing property and high color fastness. [0003] In the preparation of traditional disperse red 343, an ethyl orange dye and a propyl orange dye must be synthesized first, and then the two orange dyes are cyanated to obtain a red dye, and then the two red dyes are mixed in proportion. Due to the cyanidation reaction of a large amount of highly toxic cyanide used in production, a large amount of toxic and harmful wastewater will be produced, and these wastewaters are not easy to trea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B29/045C09B67/22C09B67/38
Inventor 顾敏伟洪道广顾康康顾宇
Owner ZHEJIANG HUADIE CHEM
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