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Preparation method of purple active dye

A compound and solution technology, applied in the field of preparation of purple reactive dyes, to achieve the effects of environmental protection, excellent chlorine bleaching resistance and sweat resistance, and easy discharge

Inactive Publication Date: 2012-09-05
TIANJIN DEK CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Acid dyes can no longer meet the development of the times

Method used

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  • Preparation method of purple active dye
  • Preparation method of purple active dye
  • Preparation method of purple active dye

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The present embodiment provides the preparation method of following formula (I) compound:

[0039]

[0040] The specific preparation method is as follows:

[0041] A. Dissolution of H acid

[0042] Add 17.1 g of 100% H acid to 200 ml of water, and adjust the pH to 6.5-7 with 30% sodium hydroxide solution under stirring to dissolve and clarify the material. The volume of the adjusted solution is 250 ml, and the mass / volume concentration of the adjusted solution is 4.5%.

[0043] B. Condensation reaction

[0044] The external bath adjusts the temperature of the H acid solution to 0°C. Maintaining the temperature at 0-5°C, slowly add 14.0 g of 100% 4-carboxybenzenesulfonyl chloride four times for a total of 60 minutes. After each addition, adjust the pH to 6-6.5 with 30% sodium hydroxide. Maintain the temperature at 0-5°C and maintain the pH=6-6.5 for 3 hours. Then adjust the pH to 8.5 with 30% sodium hydroxide, raise the temperature to 90°C, maintain the temperatu...

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PUM

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Abstract

The invention provides a preparation method of a purple active dye, which comprises the steps of condensing, diazotizing, coupling, neutralizing, drying and debrominating. The method has low production cost; the product can be used for independently dyeing wool fiber or with the other dyes, has good dyeing capability, fresh colored light, good color fastness; and particularly, the dyed wool fiberhas good dye rate and color fixation rate.

Description

technical field [0001] The invention relates to the technical field of reactive dyes, in particular to a preparation method of purple reactive dyes. Background technique [0002] Now generally dyeing wool and cashmere, the dyes used are acid dyes, acid mordant dyes and metal complex dyes. Because the materials dyed with these types of dyes have poor fastness, the shade is not very bright, and it will cause troubles to the environment. In the 21st century, due to environmental and ecological constraints, the requirements for color uptake rate, color fixation rate and dyeing wastewater are getting higher and higher. Acid dyes can no longer meet the development of the times. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a purple reactive dye for wool that can reduce environmental pollution, the cost of required raw materials is low, the product solubility is high, and the color is bright, the application perform...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C311/21C07C303/40C09B62/53C09B67/24C09B67/26
Inventor 苏长湘郝津来
Owner TIANJIN DEK CHEM