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Preparation of cotton fibre yellow reactive dye

An I-A and compound technology, applied in the field of yellow reactive dyes and their preparation, can solve the problems of dyes not being able to dye dark colors, high unit cost, unfavorable environmental protection, etc. excellent effect

Active Publication Date: 2013-11-13
TIANJIN DEK CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the unit cost of yellow products used in the printing and dyeing industry is high, the waste of materials is serious, salting out produces sewage, and dyes cannot dye dark colors
Moreover, the active group dyeing needs to be carried out in a strong alkaline medium, which makes it difficult to discharge the dyeing wastewater in a neutral manner, which is not conducive to environmental protection

Method used

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  • Preparation of cotton fibre yellow reactive dye
  • Preparation of cotton fibre yellow reactive dye
  • Preparation of cotton fibre yellow reactive dye

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The present embodiment provides the preparation method of following formula (I-A) compound:

[0037] The specific preparation method is as follows:

[0038]

[0039] 1. Diazotization of 2-naphthylamine-3,6,8-trisulfonic acid

[0040] Drop 300kg of 70% 2-naphthylamine-3,6,8-trisulfonic acid into 500kg of water and stir evenly, then add 800kg of crushed ice, the temperature is 0°C, then quickly add 200kg of 20% sodium nitrite solution, add The final temperature is 2°C and the stirring is continued for 2 hours, the end point temperature is 6°C with a slight excess of sodium nitrite, and the excess nitrous acid is removed with industrial sulfamic acid to prepare for coupling.

[0041] 2. Coupling:

[0042] Add 135 kg of 60% m-urea amidoaniline to 300 kg of water, stir at room temperature for 10 minutes, adjust the pH to 7.5 with 20% sodium carbonate solution, and then add the diazonium salt solution prepared in the above steps within 1 hour for coupling. While adding ...

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PUM

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Abstract

The invention provides a method for preparing yellow reactive dye. The active group of the dye is a quaternary ammonium salt type dye formed by nicotinic acid and dye matrix. The dye compound prepared by the method of the invention can carry out sole dyeing or dyeing by combining with other dyes on cotton fiber, and the dye compound has good dyeing property, bright dyeing chromatic light and good dyeing fastness, especially, the dyed cotton fiber has good dyeing rate and color fixing rate.

Description

technical field [0001] The invention relates to the technical field of reactive dyes, in particular to a yellow reactive dye and a preparation method thereof. Background technique [0002] Reactive dyes have the characteristics of bright color, excellent application performance, and strong practicability. The active groups in the dye molecules form stable chemical bonds with the fibers and have good fastness. [0003] At present, the unit cost of yellow products used in the printing and dyeing industry is high, the material waste is serious, the salting out produces sewage, and the dye cannot dye dark colors. Moreover, active group dyeing needs to be carried out in a stronger alkaline medium, which makes it difficult to discharge dyeing wastewater neutrally and is not conducive to environmental protection. [0004] The dye provided by the invention can solve the above problems, and provides a dye that can be dyed in a weaker medium, and has good dyeing performance and can i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09B62/09C07D401/04
Inventor 张兴华张玉卿曹世川
Owner TIANJIN DEK CHEM