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Heterocycle alkaline-washable carboxylic acid ethyl ester type disperse dye and preparation method thereof

A technology of heterocyclic alkali-washable ethyl carboxylate type and alkali-washable ethyl carboxylate type, which is applied in the field of heterocyclic alkali-washable ethyl carboxylate type disperse dyes and its preparation, and can solve the potential safety hazards of hydrosulfite and the existing Fire hazards, easy spontaneous combustion of sodium hydrosulfide and other problems, to achieve bright color, reduce the generation of harmful substances and three wastes, and excellent alkali washable performance

Inactive Publication Date: 2015-11-25
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the use of a large amount of hydrosulfite in the reduction cleaning process, there are high concentrations of unreacted hydrosulfite, sodium hydroxide and aromatic amine compounds with potential carcinogenicity or mutagenicity in the treated reducing solution, and these wastewaters are discharged into rivers will cause serious pollution to water bodies
In addition, there are safety hazards in the storage and use of hydrosulfite
Hydrosulfite is easy to spontaneously ignite after absorbing moisture, and there is a fire hazard; a large amount of irritating gas will escape during use, which will aggravate environmental pollution and endanger health

Method used

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  • Heterocycle alkaline-washable carboxylic acid ethyl ester type disperse dye and preparation method thereof
  • Heterocycle alkaline-washable carboxylic acid ethyl ester type disperse dye and preparation method thereof
  • Heterocycle alkaline-washable carboxylic acid ethyl ester type disperse dye and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032]Embodiment 1, a kind of preparation method of heterocyclic alkali-washable ethyl carboxylate type disperse dye, carry out the following steps successively:

[0033] 1), take by weighing C.I. disperse red 1174.14g (10mmol), dehydrated alcohol 40ml (32g) successively in the 100ml there-necked flask equipped with the reflux condenser, slowly add concentrated H dropwise under magnetic stirring 2 SO 4 17ml (32g), refluxed for 2h, at this time, the reaction was detected by TLC to the end point.

[0034] 2), after the reaction finishes, be cooled to room temperature, then put into ice-water bath and add 10% (mass %) dilute NaOH solution to adjust the reaction system to neutrality (pH value to 7), thereby realize crystallization by cooling, filter, The crude product of ethyl carboxylate type disperse dye is obtained. The crude product is finally purified by ethanol recrystallization to obtain pure ethyl carboxylate type disperse dye.

[0035] The above-mentioned purification ...

Embodiment 2

[0039] C.I. disperse red 117 in Example 1 was changed to C.I. disperse red 152 (the molar weight was constant), and the TLC method was used to detect the reaction to the end point (that is, the reaction time was 6 hours); Ethyl acetate dyes.

[0040] The structural formula of the ethyl heterocyclic carboxylate dye is as follows:

[0041]

Embodiment 3

[0043] C.I. disperse red 117 in Example 1 was changed to C.I. disperse red 156 (the molar weight was constant), and the TLC method was used to detect the reaction to the end point (that is, the reaction time was 1 hour), and the rest were equivalent to Example 1; Ethyl acetate dyes.

[0044] The structural formula of the ethyl heterocyclic carboxylate dye is as follows:

[0045]

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Abstract

The invention discloses heterocycle alkaline-washable carboxylic acid ethyl ester type disperse dye. The molecular structure of the disperse dye comprises carboxylic acid ethyl ester groups, and the structural general formula of the carboxylic acid ethyl ester groups is D-COOC2H5, wherein the D refers to a color body with a heterocycle azo structure. The invention further provides a preparation method of the heterocycle alkaline-washable carboxylic acid ethyl ester type disperse dye, existing cyanophoric disperse dye is selected as a raw material, and an alcoholysis method is applied to preparation of the heterocycle alkaline-washable carboxylic acid ethyl ester type disperse dye. The disperse dye has good dyeing property, and has high dye-uptake rate and color fastness when being applied to Dacron dyeing; during post-treatment of PET (polyethylene terephthalate) fiber dyeing, acid dye containing water soluble groups and harmfulless ethyl alcohol are generated only through alkaline solution treatment of fibers to achieve ester group hydrolysis, and the obtained acid dye can be recycled through acidification and the like.

Description

technical field [0001] The invention relates to a heterocyclic alkali-washable ethyl carboxylate type disperse dye and a preparation method thereof. Background technique [0002] The output of my country's disperse dyes ranks first in the world, but at present, dye manufacturing enterprises generally have problems such as outdated varieties and backward technology, resulting in low profit margins of domestic disperse dyes, and at the same time, the increasing pressure on environmental protection makes the development of the entire textile industry face predicament. The development of new high-fastness dyes and the upgrading of existing dyestuff production technology to increase the technical content of dyestuffs will be the only way for the development of the dyestuff industry. In the face of fierce market competition, the future development of disperse dyes will mainly focus on the following aspects: (1) In view of the long synthetic route of anthraquinone-type disperse dye...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B29/36C09B67/38D06P1/18D06P3/54
Inventor 崔志华程晓红孟娇陈维国
Owner ZHEJIANG SCI-TECH UNIV
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