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Wool bright yellow active dye and preparation method thereof

A technology of reactive dyes and bright yellow, applied in reactive dyes, dyeing methods, organic dyes, etc., can solve the problems of difficult to obtain small dyes, complicated steps, environmental pollution, etc., and achieve broad commercialization prospects, high color fixing rate, high quality The effect of dyeing rate and fixing rate

Active Publication Date: 2012-12-05
中国中化股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using this process to prepare Lanasol Yellow 4G, small dyes are not easy to obtain, the steps are cumbersome, and a large amount of waste water is generated during the preparation process, causing great pollution to the environment

Method used

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  • Wool bright yellow active dye and preparation method thereof
  • Wool bright yellow active dye and preparation method thereof
  • Wool bright yellow active dye and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Example 1 Preparation of dye (1)

[0046]

[0047] Dissolve 2.1 parts of 2,4-diaminobenzenesulfonic acid in 30 parts of water, cool with an ice-water bath, control the temperature of the solution at 0-5°C, add 2.5 parts of 2,3-dibromopropionyl chloride, and use carbonic acid at the same time Sodium adjusts the pH of the reaction solution between 6-7, and the reaction is continued for 1 hour. The endpoint of the reaction was detected by HPLC.

[0048] Add 2 parts of 30% hydrochloric acid to the above solution, control the temperature of the reaction solution at 5-10°C, and add 0.67 parts of sodium nitrite. Keep the temperature between 10-15°C and react for 2 hours.

[0049] After the diazotization reaction is over, use sulfamic acid to eliminate excess nitrous acid, and then add it to the completely dissolved 1-(4-sulfophenyl)-3-carboxy-5-pyrazolone solution [Disperse 2.7 parts of 1-(4-sulfophenyl)-3-carboxy-5-pyrazolone in 30 parts of water, adjust the pH of the solution to...

Embodiment 2

[0054] Example 2 Preparation of dye (2)

[0055]

[0056] The coupling component is selected as 1-(3-aminophenyl)-3-carboxy-5-pyrazolone instead of 1-(4-sulfophenyl)-3-carboxy-5-pyrazolone in Example 1. The oxazolinone was prepared in the same manner as in Example 1 to obtain the yellow dye (2).

Embodiment 3

[0057] Example 3 Preparation of dye (3)

[0058]

[0059] The coupling component is 1-(3-amino-2-methyl-5-sulfonic acid phenyl)-3-methyl-5-pyrazolone instead of 1-(4-sulfonic acid in Example 1. (Phenyl)-3-carboxy-5-pyrazolone, the preparation method is the same as that in Example 1, to obtain the yellow dye (3).

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Abstract

The invention discloses a wool bright yellow active dye with a novel structure. A structural general formula of the wool bright yellow active dye is as follows: the definition of each group in the formula is shown in a description. The wool bright yellow active dye is mainly used for dying and printing wool, silks, polyamide and blended fabric thereof or can be used for dying and printing loose wool, wool top, yarn, carpet and a textile subjected to shrink proofing and woven fabric. After being dyed, the textile has bright colors, favorable level dyeing effect and tone reproducibility, high absorbability and color fixation rate, and excellent light fastness and wet treatment fastness, and can meet the requirements of the market on the environmental and ecological protection of the dye.

Description

Technical field [0001] The invention belongs to the field of fine chemicals, and specifically relates to a bright yellow reactive dye for wool and a preparation method thereof. Background technique [0002] Ciba began to introduce the Lanasol series of reactive dyes for wool in 1966. In the Lanasol series of reactive dyes, the yellow variety is Lanasol Yellow 4G, which has the following structural formula: [0003] [0004] The preparation of Lanasol Yellow 4G is only described in the patent GB885815, but the preparation process described in the patent is based on the following small dye as the starting material, and 2,3-dibromopropionyl chloride dissolved in acetone at 0-5℃ After half an hour of reaction, salting out and drying to obtain Lanasol Yellow 4G before debromination. Using this process to prepare Lanasol Yellow 4G, small dyes are not easy to obtain, the steps are complicated, and a large amount of waste water is generated during the preparation process, which causes gr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B62/473D06P1/384D06P3/10
Inventor 徐飒英肖洋王勇李付刚杨桂芳
Owner 中国中化股份有限公司
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