Preparation technology of azo active dye

A reactive dye and preparation process technology, applied in the field of dye preparation technology, can solve the problems of unattainable, low absolute dye fixation rate, etc., and achieve the effects of high reactivity, good fixation ability, and excellent performance improvement.

Inactive Publication Date: 2006-06-28
吴江桃源染料有限公司
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AI Technical Summary

Problems solved by technology

The absolute fixation rate of the dyes synthesized by the above process is low, and cannot meet the requirements of the above characteristics

Method used

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  • Preparation technology of azo active dye
  • Preparation technology of azo active dye

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Embodiment Construction

[0027] The following examples serve to illustrate the invention, temperatures are in degrees Celsius, and parts and percentages are by weight unless otherwise stated.

[0028] A kind of preparation technology of azo reactive dye, it comprises the following steps

[0029] 27-30.3 parts by weight of 2-amino-1,5-naphthalene disulfonic acid is added to form a diazonium salt component after adding 30-36.5 parts of hydrochloric acid and 5.4-6.9 parts of sodium nitrite;

[0030] 18-20 parts by weight of cyanuric chloride, 50 parts of water, 5 parts of disodium hydrogen phosphate, fully mixed with 0.1 part of wetting agent (wetting agent can effectively disperse and penetrate, such as SBO, acetone, etc.) To form a suspension, add 27 to 28.1 parts of 4-(β-hydroxyvinylsulfone sulfate) aniline solution dropwise to the suspension, and then add dilute sodium hydroxide solution to the suspension to keep the pH value of the suspension Between 3.5 and 4, keep reacting until the unreacted 4-(...

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Abstract

The invention relates to an azo active material preparing process, where 2-amino-1.5-naphthalene disulfonic acid reacts with the added hydrochloric acid and sodium nitrite to form a diazo salt component; tricyanogen chloride, water and disodium hydrogen phosphate are fully mixed on condition of adding lubricant to form a suspension, dripping 4-(beta-hydroxyvinyl sulfone sulfate) aniline solution in the suspension, then adding sodium hydroxide solution to the suspension to make pH value of the suspension maintained between 3.5 and 4, and maintaining the reaction to the terminal; raising the temperature to 20-25 deg.C, adding in sodium hydroxide solution to regulate the pH value to 5-5.5, dripping in 2-amino-5-naphthol-7-sulfonic acid, and maintaining the pH value at 3-7 and the temperature at 25-40 deg.C, reaction, obtain a coupled component solution; adding the above diazo salt to the coupled component solution for making coupled reaction at the temperature of 0-60 deg.C and the pH value regulated to 3-7, reacting, eliminating the salts through ionic film and obtaining the azo active material. The advantages are high reacting activity, good color fixing ability and excellent improving performance.

Description

technical field [0001] The invention relates to a preparation process of a dye. Background technique [0002] The present invention relates to a kind of dye compound, and its general structural formula is: [0003] [0004] In the formula: Q=benzene or naphthalene precursor, R1, R2=H, SO3H. R3, R4=H, C1-C4 alkyl, X=Cl, F, m=1-2, n=0-1, R is hydrolyzable vinyl sulfone; wherein Q is the parent of naphthalenesulfonic acid, especially containing two A sulfonic acid group; or wherein Q is a benzenesulfonic acid parent, containing one or two sulfonic acid groups, or a substance containing methoxysulfonic acid. [0005] In the prior art, the process for preparing azo reactive dyes is that cyanuric chloride, water, and disodium hydrogen phosphate are fully mixed under the situation of adding a wetting agent, and 2-amino-5-naphthol-7-sulfonic acid is added to Suspension, after which, its pH value is maintained between 2.5-3 with dilute sodium hydrox...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09B29/30C09B62/53
Inventor 庄永祥陆再宏郭正祥
Owner 吴江桃源染料有限公司
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