Method for preparing reactive brilliant blue 3G for wool

A technology for reactive brilliant blue and wool, applied in reactive dyes, chemical instruments and methods, dyeing methods, etc., can solve the problems of high labor intensity, long reaction period, environmental pollution, etc., and achieve the effect of simple operation

Active Publication Date: 2013-09-11
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

[0008] The purpose of the present invention is to provide a method for preparing reactive brilliant blue 3G for wool, to over

Method used

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  • Method for preparing reactive brilliant blue 3G for wool
  • Method for preparing reactive brilliant blue 3G for wool
  • Method for preparing reactive brilliant blue 3G for wool

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] a. Condensation reaction of bromoacid and p-aminoacetanilide

[0027]

[0028] Add 1.68 parts of sodium bicarbonate, 1.06 parts of sodium carbonate and 40 parts of water into a three-necked reaction flask, and stir to dissolve. After completely dissolving, add 4.04 parts of bromonic acid, 1.8 parts of p-aminoacetanilide, 0.125 parts of copper sulfate and 0.125 parts of stannous chloride in sequence, raise the temperature to 70-80°C, stir and react for 4 hours, and detect bromine by thin-layer chromatography or HPLC. Amino acid disappears and the reaction is complete. Cool down to room temperature and filter, mix the filter cake with 40 parts of water, adjust the pH to 1.5-2.0 with 30% hydrochloric acid, stir, filter at room temperature, and dry the filter cake to obtain 4.5 parts of condensate for future use.

[0029] b. Sulfonation reaction

[0030]

[0031] Add 20 parts of 8-10% fuming sulfuric acid into a dry three-necked reaction flask, cool down to 0-5°C in...

Embodiment 2

[0042] Repeat the operating process and process conditions described in Example 1, except that in the step (a) of Example 1, the addition of copper sulfate and tin protochloride is changed to 0.25 parts respectively, and finally 8.5 parts of active dyes for wool are obtained. Blue 3G.

Embodiment 3

[0044] Repeat the operating process and process conditions described in Example 1, except that in the step (a) of Example 1, the amount of p-aminoacetanilide added is changed to 1.5 parts, and 3.6 parts are obtained after the primary condensation filter cake is dried, and finally 7 parts of Reactive Brilliant Blue 3G is used for hair.

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Abstract

The invention provides a method for preparing reactive brilliant blue 3G for wool. The method comprises the following steps of: (1) condensing bromamine acid and p-amine acetanilide under the action of a catalyst, and acidifying to obtain a condensation product; (2) sulfonating the condensation product by using fuming sulfuric acid, and performing basic hydrolysis to remove acetyl; and (3) condensing a hydrolysis product with 2,3-dibromo propionyl chloride, and performing debromination to prepare a reactive brilliant blue 3G dye. The preparation method provided by the invention is low in cost, energy consumption and pollution, and is suitable for industrial large-scale production. Various application performance indexes of the reactive brilliant blue 3G for wool, which is obtained by the preparation method provided by the invention, reach or exceed those of products of foreign companies.

Description

technical field [0001] The invention belongs to the field of fine chemicals, and relates to a research on a method for preparing reactive dyes, in particular to a method for preparing reactive brilliant blue 3G for wool. Background technique [0002] In 1966, Ciba Company launched Lanasol series of reactive dyes for wool. Among the Lanasol series of reactive dyes, Lanasol Blue 3G is one of the blue varieties, which is called Reactive Brilliant Blue 3G for wool in the domestic market. The structural formula is as follows: [0003] [0004] Brilliant blue 3G reactive dyes for wool can be used for dyeing and printing of protein fiber materials, such as dyeing and printing of wool, cashmere, silk and other fibers, and can also be used for loose wool, wool tops, yarns, carpets, fabrics and Dyeing and printing of woven fabrics. After dyeing wool, silk and other fibers with reactive brilliant blue 3G dyes, it will show a bright blue color, with extremely high color fixation ra...

Claims

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Application Information

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IPC IPC(8): C09B62/467D06P1/384D06P3/14
Inventor 宋志承徐飒英尚庆梅王勇
Owner 中国中化股份有限公司
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