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Preparation method of reactive dye blue

A technology of reactive dyes and compounds, applied in the field of dyes, can solve the problems of color flower and vat difference, high energy consumption, lengthy process, etc.

Active Publication Date: 2020-12-22
苏州澳缘盛新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the same color is good and the fastness is high, the process is lengthy and the energy consumption is too much, which is not conducive to energy saving, emission reduction and clean production of printing and dyeing enterprises, and as the processing time prolongs, there may be problems of color flower and cylinder difference in production , affecting product quality and efficiency
[0003] In order to solve these problems, many factories are exploring the one-bath one-step dyeing method of polyester and cotton. However, the existing reactive dye blue still has a high temperature resistance difference, and can only be dyed at about 50°C, which is not suitable for one-bath one-step dyeing with disperse dyes. dyeing

Method used

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  • Preparation method of reactive dye blue
  • Preparation method of reactive dye blue
  • Preparation method of reactive dye blue

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] The reactive dye blue provided by the present embodiment is prepared by the following method:

[0069] (1) will Add it into water and crushed ice and stir, keep the temperature at 0-5°C, add hydrochloric acid and then add sodium nitrite to react for 1.5 hours to obtain the first mixed solution, wherein, The molar ratio of HCl and sodium nitrite is 1:1.0:1.01, and the hydrochloric acid selects the hydrochloric acid of concentration 30% for use;

[0070] (2) Add to the first mixed solution obtained in step (1) Add sodium bicarbonate to adjust the pH value to 2.5-3.0, react at 10-15°C for 5.5 hours to obtain the second mixed solution, wherein, and The feeding molar ratio is 1:2.02;

[0071] (3) Will Add to crushed ice and water and stir, then add Then add sodium bicarbonate to adjust the pH value to 3.0-3.5, react at 5-10° C. for 3.5 hours to obtain the third mixed solution, wherein, and The feeding molar ratio is 1:0.99;

[0072] (4) will Add to the th...

Embodiment 2

[0081] The reactive dye blue provided by the present embodiment is prepared by the following method:

[0082] (1) will Add it into water and crushed ice and stir, keep the temperature at 0-5°C, add hydrochloric acid and then add sodium nitrite to react for 1.5 hours to obtain the first mixed solution, wherein, The mol ratio of hydrochloric acid and sodium nitrite is 1:1.0:1.01, and hydrochloric acid selects the hydrochloric acid of concentration 30% for use;

[0083] (2) Add to the first mixed solution obtained in step (1) Add sodium bicarbonate to adjust the pH value to 2.5-3.0, react at 10-15°C for 6 hours to obtain the second mixed solution, wherein, and The feeding molar ratio is 1:2.02;

[0084] (3) Will Add to crushed ice and water and stir, then add Then add sodium bicarbonate to adjust the pH value to 3.0-3.5, react at 5-10° C. for 3 hours to obtain the third mixed solution, wherein, and The feeding molar ratio is 1:0.99;

[0085] (4) will Add to the...

Embodiment 3

[0094] The reactive dye blue provided by the present embodiment is prepared by the following method:

[0095] (1) will Add it into water and crushed ice and stir, keep the temperature at 0-5°C, add hydrochloric acid and then add sodium nitrite to react for 1.5 hours to obtain the first mixed solution, wherein, The molar ratio of HCl and sodium nitrite is 1:1.0:1.01, and the hydrochloric acid selects the hydrochloric acid of concentration 30% for use;

[0096] (2) Add to the first mixed solution obtained in step (1) Add sodium bicarbonate to adjust the pH value to 2.5-3.0, react at 10-15°C for 5 hours to obtain the second mixed solution, wherein, and The feeding molar ratio is 1:2.02;

[0097] (3) Will Add to crushed ice and water and stir, then add Then add sodium bicarbonate to adjust the pH value to 2.5-3.0, react at 5-10° C. for 4 hours to obtain the third mixed solution, wherein, and The feeding molar ratio is 1:1.01;

[0098] (4) will Add to the third ...

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Abstract

The invention relates to a reactive dye blue preparation method, which comprises: carrying out a diazo reaction on a compound represented by a formula I under the action of nitrous acid to obtain a first intermediate; carrying out an acid coupling reaction on the first intermediate and a compound shown as a formula II to obtain a second intermediate; carrying out a primary condensation reaction onthe compound shown in the formula III and the compound shown in the formula IV to obtain a primary condensation product; carrying out a secondary condensation reaction on the primary condensation product and a compound shown as a formula V to obtain a secondary condensation product; carrying out a diazo reaction on the secondary condensation product under the action of nitrous acid to obtain a third intermediate; carrying out an alkali coupling reaction on the second intermediate and the third intermediate to obtain a fourth intermediate; carrying out a condensation reaction on the fourth intermediate and a compound shown in the formula VI three times to obtain the reactive dye blue, wherein the reactive dye blue has high reactivity and good color fixing and dyeing capacity, can be used in cooperation with disperse dyes, dyes polyester cotton products at the temperature higher than 100 DEG C at the same time, and achieves the one-bath dyeing process.

Description

technical field [0001] The invention belongs to the technical field of dyes, and in particular relates to a preparation method of reactive dye blue. Background technique [0002] When polyester-cotton blended fabrics currently on the market are dyed, the commonly used dyeing method is the two-bath method, that is, the fabric is first dyed with disperse dyes, washed, and then dyed with reactive dyes and washed. Although the same color is good and the fastness is high, the process is lengthy and the energy consumption is too much, which is not conducive to energy saving, emission reduction and clean production of printing and dyeing enterprises, and as the processing time prolongs, there may be problems of color flower and cylinder difference in production , affecting product quality and efficiency. [0003] In order to solve these problems, many factories are exploring the one-bath one-step dyeing method of polyester and cotton. However, the existing reactive dye blue still ...

Claims

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Application Information

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IPC IPC(8): C09B62/09C09B62/513
CPCC09B62/09C09B62/513
Inventor 庄永祥王高峰陆海英
Owner 苏州澳缘盛新材料科技有限公司
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