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Environment-friendly yellow reactive dye and preparation method thereof

A kind of reactive dyes, environment-friendly technology, applied in the direction of reactive dyes, azo dyes, organic dyes, etc., can solve the problems of water pollution, soil salinization, etc., achieve good dyeing effect, less harm, improve dyeing rate and solid The effect of color ratio

Pending Publication Date: 2022-03-11
HUBEI COLOR ROOT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the dyeing residue of the above-mentioned reactive dyes contains a large amount of electrolytes and alkali agents, which will cause environmental problems such as water pollution and soil salinization.

Method used

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  • Environment-friendly yellow reactive dye and preparation method thereof
  • Environment-friendly yellow reactive dye and preparation method thereof
  • Environment-friendly yellow reactive dye and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0041] This preparation example provides a bisbenzimidazole diamine color body, including the following raw materials: 15.3g of 3,4-diaminonitrobenzene, 6.3g of oxalic acid, 400mL of ethylene glycol, 14.71g of polyphosphoric acid catalyst, hydrated di Tin chloride 11.846g, ethyl acetate 300mL. Among them, the polyphosphoric acid catalyst is tripolyphosphoric acid.

[0042] The bisbenzimidazole diamine color body is prepared according to the following steps,

[0043] Color body preparation stage: Mix 3,4-diaminonitrobenzene and oxalic acid in ethylene glycol evenly, then add tripolyphosphoric acid catalyst to obtain a reflux reaction solution; then stir and reflux reaction at 145°C under reflux conditions solution. The reflux reaction solution was monitored by thin-layer chromatography. After stirring for 5 h, the volume ratio of dichloromethane and methanol in the reflux reaction solution was 10:1, indicating that the reaction was complete and a mixture was obtained. The mi...

preparation example 2

[0046] This preparation example provides a bisbenzimidazole diammonium color body. The difference between this preparation example and Preparation Example 1 is that in the color body preparation stage, under the reflux condition of 140°C, the reaction solution is stirred and refluxed, and a thin layer is used. The reflux reaction solution was monitored by chromatography. When the volume ratio of dichloromethane and methanol in the reflux reaction solution was 10:1, it indicated that the reaction was complete and a mixture was obtained.

preparation example 3

[0048] This preparation example provides a bisbenzimidazole diamine color body. The difference between this preparation example and Preparation Example 1 is that in the color body preparation stage, the reflux reaction solution is stirred and refluxed at 150°C, and a thin layer is used. The reflux reaction solution was monitored by chromatography. When the volume ratio of dichloromethane and methanol in the reflux reaction solution was 10:1, it indicated that the reaction was complete and a mixture was obtained.

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Abstract

The invention discloses an environment-friendly yellow reactive dye and a preparation method thereof, and relates to the technical field of reactive dyes. The parent structure of the reactive dye contains a heterocyclic structure and a plurality of active groups, the heterocyclic structure is beneficial to reducing the salt effect of the reactive dye, and the plurality of active groups are beneficial to improving the dye uptake and fixation rate of the dye. The preparation method of the environment-friendly yellow reactive dye comprises the following steps: mixing a bis-benzimidazole diamine color body and a primary condensation compound solution in a molar ratio of 1: (0.45-0.5) to obtain a mixed solution, adding an acid-binding agent into the mixed solution, and carrying out condensation reaction at 20-25 DEG C to obtain the environment-friendly yellow reactive dye. The salt effect of the reactive dye is reduced, active groups in reactive dye molecules are increased, and the dye uptake and the fixation rate of the dye are improved. The environment-friendly yellow reactive dye disclosed by the invention has a relatively good dyeing effect under a saline-alkali-free or low-saline-alkali dyeing condition, has small harm to the environment and is more environment-friendly.

Description

technical field [0001] The invention relates to the technical field of reactive dyes, in particular to an environment-friendly yellow reactive dye and a preparation method thereof. Background technique [0002] Reactive dyes can be used for dyeing of cellulose fibers, protein fibers and regenerated fibers. Reactive dyes have a simple molecular structure and complete color spectrum. Good sex and other advantages. However, reactive dyes also have the characteristics of low dyeing percentage and low fixation rate. [0003] In related technologies, in order to increase the dyeing percentage and color fixation rate of reactive dyes, a large amount of electrolytes such as sodium chloride and sodium sulfate are generally added during the dyeing process to achieve the purpose of dyeing acceleration; sodium carbonate is added in the color fixing stage Alkali agent, in order to improve the color fixing rate. [0004] However, the dyeing raffinate of the above-mentioned reactive dye...

Claims

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Application Information

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IPC IPC(8): C09B62/04C07D403/14C09B67/24
CPCC09B62/04C07D403/14C09B67/0072
Inventor 刘行刘子轩沈巍华祝超刘振国曾令新
Owner HUBEI COLOR ROOT TECH CO LTD
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