Preparation method for reaction red dye

A technology of reactive scarlet and dyes, which is applied in the field of preparation of reactive scarlet dyes, can solve the problems of large resource occupation, difficulty in color matching, high energy consumption, etc., and achieve the effects of less resource occupation, convenient production, and avoiding excessive resource occupation

Active Publication Date: 2018-02-16
ZHEJIANG JINGGUANG IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, in the process of producing reactive scarlet dyes, the production of red dyes and orange dyes alone h

Method used

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  • Preparation method for reaction red dye
  • Preparation method for reaction red dye
  • Preparation method for reaction red dye

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Process 1, cyanuric chloride beating

[0046] Add 800 kg of industrial cyanuric chloride solids and 10 kg of dispersant C into a FRP reaction pot containing 2000 kg of water and 3000 kg of ice, beat and stir for 1 hour, and add a small amount of 30% hydrochloric acid according to the actual pH value Control pH=2~2.5, control temperature 0~5℃.

[0047] Step 2, a condensation reaction

[0048]Then add 1242 kg of solid para-ester (amino content ≥ 96%), after fully stirring, add the mass fraction of 10% mixed alkali solution prepared by soda ash and baking soda (mass ratio 3:7), dropwise To the above-mentioned condensate, (the titration rate is 500L / 10min respectively), the temperature of the addition process is controlled to be lower than 3°C (if the temperature is high, ice should be replenished, otherwise the reaction will be affected), the pH value reaches about 1.0, and the remaining mixed alkali is within 10 to 20 minutes. Adjust the pH to 4.0. When the pH naturally...

Embodiment 2

[0059] Prepare according to the preparation process of Example 1, the difference is that once the shrinkage hydrolysis is completed, the dosage of J acid and H acid dry powder is 589 kg and 445 kg respectively, and finally the scarlet reactive dye is obtained. After HPLC analysis, the formula I compound and The molar ratio of the compound of formula II is approximately 0.34:0.66.

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Abstract

The invention relates to a preparation method for a reaction red dye. The preparation method comprises the following steps: adding cyanuric chloride into ice water, and carrying out pulping treatmentso as to obtain a pulped solution; adding solid para-ester into the pulped solution, continuing adding a mixed alkaline solution so as to regulate alkalinity, and carrying out a condensation reactionso as to obtain a first condensate, wherein the mixed alkaline is sodium carbonate and baking soda; adding solid J acid into the first condensate, and carrying out a condensation reaction so as to obtain a second condensate; continuing adding solid H acid into the second condensate, and carrying out a condensation reaction so as to obtain a mixed second condensate, wherein the mol ratio of the solid J acid to the solid H acid is (0.65-0.68): (0.32-0.35); adding hydrochloric acid and sodium nitrite into sulfonated tobias acid, and carrying out a diazotization reaction so as to obtain sulfonatedtobias acid diazotized salt; and adding the sulfonated tobias acid diazotized salt into the mixed second condensate, carrying out a coupling reaction, and carrying out post-treatment so as to obtainthe reaction red dye. The preparation method provided by the invention is convenient and rapid, occupies few resources, has low energy consumption, and facilitates color matching.

Description

technical field [0001] The invention relates to the field of reactive dye preparation, in particular to a preparation method of reactive scarlet dye. Background technique [0002] Reactive dyes, also known as reactive dyes, are a class of dyes that chemically react with fibers during dyeing. This type of dye molecule contains groups that can react chemically with the fiber. When dyeing, the dye reacts with the fiber and forms a covalent bond between the two to form a whole, which improves the fastness to washing and rubbing. [0003] Most of the water-soluble scarlet dyes currently on the market are compounded by the traditional method of reactive red 3B and orange 2R, in which the following red dye (formula Ⅰ) and orange dye (formula Ⅱ) are compounded with scarlet reactive dye The most widely used in , the structural formula is as follows: [0004] [0005] The traditional and conventional compounding method is to synthesize red and orange dyes separately, spray dry th...

Claims

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Application Information

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IPC IPC(8): C09B62/51C09B67/24
CPCC09B62/51C09B67/0072
Inventor 王国林朱友强
Owner ZHEJIANG JINGGUANG IND
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