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Yellow reactive dyes for wool and preparation method thereof

A technology of reactive yellow and dyes, applied in the field of dyes, can solve the problems of poor fastness index of acid dyes, a large amount of dye-containing wastewater, low coloring rate, etc.

Inactive Publication Date: 2009-04-29
TIANJIN DEK CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to its low coloring rate, a large amount of dye-containing wastewater is generated during use, which is not conducive to the treatment of discharge standards, and the fastness indicators after dyeing with acid dyes are poor

Method used

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  • Yellow reactive dyes for wool and preparation method thereof
  • Yellow reactive dyes for wool and preparation method thereof
  • Yellow reactive dyes for wool and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] ①Diazotization of 2-naphthylamine-4,8-disulfonic acid: 433.3kg of 70% 2-naphthylamine-4,8-disulfonic acid was added to 1000kg of water and stirred evenly, then 600kg of crushed ice was added, and 146kg of 30% hydrochloric acid was added At this time, the temperature is 0°C, and then 348.5kg of 20% sodium nitrite solution is added quickly, the temperature of the addition is 3°C, and the stirring is continued for 2 hours, the end point temperature is 7°C, the sodium nitrite is slightly excessive, and 1kg of industrial sulfamic acid is used Remove excess sodium nitrite. Prepare for coupling.

[0043] ②Coupling: add m-aminoacetanilide with a content of 99% to 500kg of water, stir at room temperature for 30 minutes, then add 200kg of crushed ice to cool down to 13°C, add 2-naphthylamine-4,8-disulfonic acid in 40 minutes For diazonium salt, use 20% sodium carbonate solution to maintain PH=5.5~6.5 at the same time. After adding, the temperature is 10°C, maintain PH=6~6.5, sti...

Embodiment 2

[0048] ①Diazotization of 2-naphthylamine-4,8-disulfonic acid: add 270kg of 30% hydrochloric acid. Other same example 1.

[0049] ②③④ Same as Example 1.

[0050] ⑤ get dry product 1278kg.

Embodiment 3

[0052] ①② Same as Example 1.

[0053] 3. add 98% cyanuric chloride 186.4kg, other with example 1.

[0054] ④ Same as Example 1.

[0055] ⑤ get dry product 1220kg.

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Abstract

The invention discloses a yellow wool reactive dye. The general formula of the yellow wool reactive dye is as shown in (I). Moreover, the invention also relates to a method for preparing the yellow wool reactive dye. Compared with the acidic yellow dye in the prior art, the dye obviously improves the dyeing performance. Moreover, the preparation method is simple and reduces pollution.

Description

technical field [0001] The invention relates to the technical field of dyes, in particular to reactive yellow dyes and a preparation method thereof. Background technique [0002] Reactive dyes have the characteristics of bright color, excellent application performance and strong practicability. In particular, the active groups in the molecule form stable chemical bonds with fibers, which makes their coloring rate and fastness after dyeing better than acid dyes. [0003] Although a series of reactive dyes for wool have been developed at present, they are expensive and used less. So most wool fabrics are still dyed with acid dyes. Due to its low dyeing rate, a large amount of dye-containing wastewater is produced during use, which is not conducive to the treatment of up-to-standard discharge, and the fastness indicators after dyeing with acid dyes are poor. Contents of the invention [0004] Therefore, the object of the present invention is to provide a kind of active yell...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B62/51D06P3/14D06P1/38
Inventor 张兴华张玉卿孙洪涛
Owner TIANJIN DEK CHEM
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