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Preparation of red reactive dye for fur

A technology of reactive red and blue, applied in the field of preparation of reactive red GN for wool, can solve the problems of low color yield, large consumption of raw materials, dust pollution, etc., and achieve good reproducibility, improved solubility and high reactivity Effect

Active Publication Date: 2009-07-15
TIANJIN DEK CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The consumption of raw materials in this process is large, the color yield is low, and the method of post-blending will cause dust pollution to the environment

Method used

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  • Preparation of red reactive dye for fur
  • Preparation of red reactive dye for fur

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] a. H-acid dissolution

[0066] Put 3000 liters of bottom water into the enamel tank, add H-acid 375.1Kg, adjust pH=6 with 30% sodium hydroxide solution, make the material completely dissolve and clarify. The volume is 3400 liters, and the mass percentage concentration of the liquid is 11%.

[0067] b. One condensation

[0068]Put into 1500 liters of ice water in the opposite reaction tank, add cyanuric chloride 209.0Kg, make material mix. Control the temperature at 0-5°C, control the pH=2, add the H-acid solution within 45 minutes, then use 10% sodium carbonate to maintain the pH=2, and stir the reaction for 2 hours. The reaction temperature is 0-5°C, and the reaction pH=2. Finally, the end point was detected by TLC aluminum-based silica gel thin-layer plate.

[0069] c. Secondary condensation

[0070] Add 133.1Kg of N-hexylaniline into solution b, keep stirring for 1 hour, heat up to 40°C, maintain pH=6 with 10% sodium carbonate solution, and stir for 1 hour. The...

Embodiment 2

[0096] a. H-acid dissolution

[0097] Put 3000 liters of bottom water into the enamel tank, add H-acid 375.1Kg, adjust pH=7 with 30% sodium hydroxide solution, make the material completely dissolve and clarify. The mass percent concentration of the solution is 11%.

[0098] b. One condensation

[0099] Put into 1500 liters of ice water in the opposite reaction tank, add cyanuric chloride 209.0Kg, make material mix. Control the temperature at 0-5°C, control the pH=2-3, add the H-acid solution within 60 minutes, then use 10% sodium carbonate to maintain the pH=2-3, and stir for 3 hours. The reaction temperature is 0-5°C, and the reaction pH=2-3. Finally, the end point was detected by TLC aluminum-based silica gel thin-layer plate.

[0100] c. Secondary condensation

[0101] Add 133.1Kg of N-hexylaniline to the primary condensate, keep stirring for 1 hour, heat up to 40°C, maintain pH=6 with 10% sodium carbonate solution, and stir for 2 hours. The reaction temperature is 40...

Embodiment 3

[0114] a. H-acid dissolution

[0115] Put 3000 liters of bottom water into the enamel tank, add H-acid 375.1Kg, adjust pH=7 with 30% sodium hydroxide solution, make the material completely dissolve and clarify. The mass percent concentration of the solution is 11%.

[0116] b. One condensation

[0117] Put into 1500 liters of ice water in the opposite reaction tank, add cyanuric chloride 209.0Kg, make material mix. Control the temperature at 0-5°C, control the pH=2-3, add the H-acid solution within 45 minutes, then use 10% sodium carbonate to maintain the pH=2-3, and stir the reaction for 3 hours. The reaction temperature is 0-5°C, and the reaction pH=2-3. Finally, the end point was detected by TLC aluminum-based silica gel thin-layer plate.

[0118] c. Secondary condensation

[0119] Add 133.1Kg of N-hexylaniline to the primary condensate, keep stirring for 1 hour, heat up to 40°C, maintain pH=6 with 10% sodium carbonate solution, and stir for 2 hours. The reaction temp...

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Abstract

The invention provides a method for preparing vital red GN, comprising the following steps: firstly, H acid solution is added to cyanuric chloride solution for reaction, after the reaction is over, N-hexyl aniline is added for reaction, thus obtaining condensation solution; then 2, 3-dibromo propionyl chloride is added to 2, 4-diaminobenzene sulfonic acid sodium for reaction, after the reaction is over, diazo reaction is carried out by adding sodium nitrite solution under acidic condition, thus obtaining diazonium solution; finally, coincidence reaction is carried out by adding the diazonium solution into the condensation solution, thus obtaining the vital red GN of the invention. The vital red GN for fur prepared by the invention has relatively high responsiveness, good solubility and bright-colored and beautiful chromatic light; in addition, the light fastness property is very good, the wet fastness property is excellent and the exhaustion rate and the color fixing rate are very high. The vital red GN of the invention can be applicable for dyeing wool, pashm and non-shrinkable wool.

Description

technical field [0001] The invention relates to a method for preparing reactive dyes for wool, in particular to a method for preparing reactive red GN for wool. Background technique [0002] Reactive dyes have the remarkable characteristics of bright color, excellent application performance, convenient use and strong applicability. In the 21st century, due to environmental and ecological constraints and economic factors, the requirements for the production and preparation of reactive dyes, color uptake rate, color fixation rate and dyeing wastewater are getting higher and higher. Existing a kind of red active dye, its molecular structural formula is as follows: [0003] [0004] The dye industry also calls it reactive red GN. As shown in Figure 1, at present, reactive red GN dyes for wool use one-shrinkage, two-shrinkage, 2,4-diaminobenzenesulfonic acid and 2,3-dibromopropionyl chloride three-shrinkage in the preparation process, and then refined, Diazotization, coupli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B62/473
Inventor 张兴华何持平
Owner TIANJIN DEK CHEM
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