Ecological environment-friendly treatment method of dye or dye intermediate

A technology for dye intermediates and environmental protection treatment, which is applied in the direction of purification/separation of organic dyes, carboxylic acid nitriles, purification/separation of amino compounds, etc., and can solve problems such as the content does not meet the limit requirements

Active Publication Date: 2015-06-24
ZHEJIANG LONGSHENG GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, tetrachlorophenol (PCP), pentachlorophenol (TeCP), chlorobenzene and chlorinated toluene (Chlorinated benzenes and toluenes) in most dyes or dye intermediates are seriously exceeded, and tetrac

Method used

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  • Ecological environment-friendly treatment method of dye or dye intermediate
  • Ecological environment-friendly treatment method of dye or dye intermediate
  • Ecological environment-friendly treatment method of dye or dye intermediate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Add 135g of water to a 500ml three-necked flask, then add 40g of 2,6-dichloro-4-nitroaniline (p-nitroaniline synthesized by chlorination reaction) (100% amount, 0.19mol) and 30% hydroxide Sodium solution 25g (0.19mol), heated up to 60°C under normal pressure, and stirred and reacted at this temperature for 3 hours, after the reaction was completed, it was prepared by suction filtration and water washing.

Embodiment 2

[0017] Add 85g of water to a 500ml three-necked flask, then add 50g of 2,6-dichloro-4-nitroaniline (commercially available product), 75g of 20% ammonia water (0.43mol) and dichloro Ethane 100g (1mol), heat up to 75°C under normal pressure, and stir at this temperature for 4 hours. After the stirring time is up, distill and recover the organic solvent dichloroethane at 60-95°C under normal pressure. The recovered dichloroethane It can be applied mechanically next time, and then the reaction solution is suction-filtered and washed with water.

Embodiment 3～17

[0019] According to the method described in the above examples, after mixing the dye or dye intermediate, water, alkali agent and organic solvent according to the ratio 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 Stir the reaction for 3-5 hours. If an organic solvent is added, the organic solvent is recovered by distillation under reduced pressure at 60-95°C after the reaction is completed, and finally the reaction solution is filtered and washed with water.

[0020] Table 1

[0021]

[0022]

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PUM

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Abstract

The invention provides an ecological environment-friendly treatment method of a dye or dye intermediate, which comprises the following steps: adding water and a neutralization agent into the dye or dye intermediate, and stirring the reaction system to react at 50-90 DEG C under atmospheric pressure or at 100-150 DEG C under 0.1-0.5 MPa for 3-5 hours; and after the reaction finishes, carrying out vacuum filtration, and washing with water to obtain the treated dye or intermediate, wherein the mole ratio of the dye or dye intermediate to the neutralization agent is 1:(0.2-6). After the dye or dye intermediate is subjected to ecological environment-friendly treatment, the contents of tetrachlorophenol (PCP), pentachlorophenol (TeCP) and chlorinated benzenes and toluenes are greatly lowered. In the fabric dyed by the dye or the dye synthesized by the dye intermediate, the contents of the PCP, TeCP and chlorinated benzenes and toluenes conform to limit requirements in Oeko-Tex Standard100.

Description

(1) Technical field [0001] The invention relates to an eco-friendly treatment method for dyes or dye intermediates. (2) Background technology [0002] In the past, we thought that as long as the dyes did not contain banned azo, carcinogenic / allergenic dyes, and directly banned disperse yellow 23, disperse orange 149, disperse orange 76, etc., and could meet these requirements, they could be called environmentally friendly dyes. Prohibited items are some relatively basic environmental protection requirements. However, in recent years, as the public has higher and higher requirements for the safety and environmental protection of textiles, especially Oeko-Tex Standard 100, in addition to the above items, there are tetrachlorophenol (PCP), pentachlorophenol (TeCP), chlorobenzene and Chlorinated benzenes and toluenes limit requirements. Chlorinated benzene, chlorinated toluene, tetrachlorophenol and pentachlorophenol are not easy to decompose. When wearing textiles containing ...

Claims

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Application Information

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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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