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A kind of eco-friendly processing method of dyestuff or dyestuff intermediate

A dye intermediate, environmental protection treatment technology, applied in the direction of organic dyes, carboxylic acid nitrile purification/separation, amino compound purification/separation, etc., can solve the problem of content not meeting the limit requirements

Active Publication Date: 2017-08-25
ZHEJIANG LONGSHENG GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, tetrachlorophenol (PCP), pentachlorophenol (TeCP), chlorobenzene and chlorinated toluene (Chlorinated benzenes and toluenes) in most dyes or dye intermediates are seriously exceeded, and tetrachlorophenol (PCP) on fabrics after dyeing , pentachlorophenol (TeCP), chlorobenzene and chlorinated toluene (Chlorinated benzenes and toluenes) content does not meet the limit requirements of Oeko-Tex Standard100

Method used

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  • A kind of eco-friendly processing method of dyestuff or dyestuff intermediate
  • A kind of eco-friendly processing method of dyestuff or dyestuff intermediate
  • A kind of eco-friendly processing method of dyestuff or dyestuff intermediate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] In a 500ml three-necked flask, add 135g of water, then add 2,6-dichloro-4-nitroaniline (p-nitroaniline synthesized through chlorination) 40g (percentage, 0.19mol) and 30% hydroxide 25g (0.19mol) of sodium solution, heated to 60°C under normal pressure, stirred and reacted at this temperature for 3 hours. After the reaction, it was made by suction filtration and washing with water.

Embodiment 2

[0021] Put 85g of water into a 500ml three-necked flask, then add 50g of 2,6-dichloro-4-nitroaniline (commercially available product), 0.24mol, 20% ammonia 75g (0.43mol) and dichloride 100g (1mol) of ethane, the normal pressure is raised to 75℃, and the reaction is stirred at this temperature for 4 hours. After the stirring time is up, the organic solvent dichloroethane is recovered by distillation under normal pressure at 60~95℃, and the recovered dichloroethane It can be applied next time, and then the reaction solution is filtered and washed with water.

Embodiment 3～17

[0023] According to the method described in the above embodiment, mix the dye or dye intermediate, water, alkali agent and organic solvent in the proportions shown in Table 1 (the amount of water in the table is the amount of water added separately), and then according to the respective reaction conditions The reaction is stirred for 3 to 5 hours. If an organic solvent is added, the organic solvent is recovered by distillation under reduced pressure at 60 to 95°C after the reaction, and finally the reaction solution is filtered and washed with water.

[0024] Table 1

[0025]

[0026]

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PUM

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Abstract

The invention provides an eco-friendly treatment method for dyes or dye intermediates. The method includes: adding water and alkali agent to dyes or dye intermediates, and the reaction system is under normal pressure, 50-90°C or at 0.1-0.5MPa, Under the condition of 100-150°C, stir and react for 3-5 hours. After the reaction, the treated dye or intermediate is obtained by suction filtration and water washing; the molar ratio of dye or dye intermediate to alkali agent is 1:0.2-6. After dyes or dye intermediates undergo the ecological and environmental protection treatment described in the present invention, tetrachlorophenol (PCP), pentachlorophenol (TeCP), chlorobenzene and chlorinated benzenes and toluenes (Chlorinated benzenes and toluenes) are greatly reduced, and this dye or this Tetrachlorophenol (PCP), pentachlorophenol (TeCP), chlorinated benzenes and toluenes (Chlorinated benzenes and toluenes) on the dyed fabrics synthesized from dye intermediates meet the limit requirements in Oeko-Tex Standard 100.

Description

[0001] (1) Technical field [0002] The invention relates to an ecological and environmental protection treatment method for dyes or dye intermediates. [0003] (2) Background technology [0004] In the past, we thought that as long as the dye does not contain banned azo, does not contain carcinogenic / allergenic dyes, does not contain directly banned Disperse Yellow 23, Disperse Orange 149, Disperse Orange 76, etc., they can be called environmentally friendly dyes if they meet these requirements. Banned items are some basic environmental protection requirements. However, in recent years, as the public’s safety and environmental protection requirements for textiles have become higher and higher, especially Oeko-Tex Standard100, in addition to the above items, there are tetrachlorophenol (PCP), pentachlorophenol (TeCP), chlorobenzene and Limit requirements for chlorotoluene (Chlorinated benzenes and toluenes). Chlorinated benzene and chlorinated toluene, tetrachlorophenol and pentach...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09B67/38C09B67/54C07C211/52C07C209/84C07C255/58C07C253/34C07D277/82
Inventor 余青结曾银城王华刚祝培明金鑫伟
Owner ZHEJIANG LONGSHENG GROUP
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