Orange reactive dyestuffs and preparation method thereof

A reactive dye, orange technology, applied in the field of orange reactive dye and its preparation, can solve the problems of difficult environmental treatment, dark color of dyeing residue, poor fabric feel, etc., and achieves excellent solubility, reduced difficulty, and good social benefits. Effect

Active Publication Date: 2008-08-06
TIANJIN DEK CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The dyeing residue of acid dyes is dark in color, has poor wet fastness, and is difficult to control the environment. Moreover, t

Method used

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  • Orange reactive dyestuffs and preparation method thereof
  • Orange reactive dyestuffs and preparation method thereof
  • Orange reactive dyestuffs and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0040] As shown in Figure 1, the preparation method of orange reactive dye of the present invention comprises the following steps:

[0041] a. Diazotization reaction: add 2-naphthylamine-disulfonic acid in water, stir and make a slurry at room temperature, add ice, add hydrochloric acid and sodium nitrite aqueous solution at a temperature of 0-10°C, and keep the pH of the reaction liquid = 1-3, slight excess of nitrous acid, stirring and reacting for 2 hours, after the reaction, remove the remaining nitrous acid;

[0042] b. Primary coupling: add sodium 2,4-diaminobenzenesulfonate to water, stir to dissolve at room temperature, add the diazotization reaction feed solution of 2-naphthylamine-disulfonic acid obtained in step a, and keep the pH under stirring =1-4, temperature 5-17°C, coupling reaction for 1 hour, and the end point of the first coupling is detected by a spectrophotometer;

[0043] c. Diazotization reaction: add β-hydroxyethyl sulfone sulfate aniline in water, st...

Embodiment 1

[0050] Reactive orange dye structural formula:

[0051]

[0052] in:

[0053] or

[0054] The preparation method is as follows:

[0055] Take 2-naphthylamine-1,5-disulfonic acid and p-beta-hydroxyethylsulfone sulfate aniline as diazo components for illustration, if m-beta-hydroxyethylsulfone sulfate aniline is another If one diazo component is used, the material dissolution method and the amount of hydrochloric acid may be different, and the rest of the preparation methods are similar.

[0056] 1. Raw material ratio:

[0057] raw material name

Molar mass

The molar ratio of

100% usage

water(t)

Sodium 2,4-diaminobenzenesulfonate

210.2

1.00

210.2

0.7

2-Naphthylamine-1,5-disulfonic acid

303.3

1.01

306.3

0.7

β-Hydroxyethylsulfone sulfate aniline

281.3

1.01

284.1

0.7

sodium nitrite

69

2.03

140.2

0.468

hydrochloric aci...

Embodiment 2

[0073] Reactive orange dye has the following general structural formula:

[0074]

[0075] The preparation method is as follows:

[0076] Take 2-naphthylamine-4,8-disulfonic acid and 2-amino-5-β-hydroxyethylsulfone sulfate sodium benzenesulfonate as diazo components for illustration.

[0077] (1) Raw material ratio:

[0078] raw material name

Molar mass

The molar ratio of

100% usage

water(t)

Sodium 2,4-diaminobenzenesulfonate

210.2

1.00

210.2

0.7

2-Naphthylamine-4,8-disulfonic acid

303.3

1.01

306.3

0.8

2-Amino-5-β-hydroxyethylsulfone sulfuric acid

Sodium Esterbenzene Sulfonate

361.4

1.01

365

0.7

sodium nitrite

69

2.03

140.2

0.468

hydrochloric acid

36.5

3.53

129

--

Sodium carbonate

106

Based on pH

sodium bicarbonate

84

Based on pH

ice ...

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Abstract

The invention discloses orange active dye and a preparation process, which uses 2, 4-di-sodium sulfanilate as coupling component, uses 2-naphthylamine-disulfonic acid and beta-carboxy ethyl sulfuryl sulfuric ester aniline as diazo component, and is prepared through two-time coupling, filtering, drying and packaging. The active orange dye has extremely excellent dissolving property, over 96% dyeing exhausting rate, is significantly superior to acid dye, and greatly reduces the difficulties to treating environment.

Description

technical field [0001] The invention relates to a reactive dye and a preparation method thereof, in particular to an orange reactive dye and a preparation method thereof. Background technique [0002] Reactive dyes have remarkable characteristics such as bright color, excellent application performance, and simple process, but there are still certain limitations in the reactive dyes that can be applied to protein fibers, especially the economical reactive dyes that can replace acid dyes are less. Synthesize a kind of reactive dye that can be applied to protein fibers, and can have good compatibility with black reactive dye, and mix it into economical, bright-colored black reactive dye. It has a broad market prospect, so its structure is the key. The dyeing residue of acid dyes is dark in color, has poor wet fastness, and is difficult to control the environment. Moreover, the dyeing of strong acid dyes in a strong acid medium dyeing bath will damage the fibers, and the fabric...

Claims

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Application Information

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IPC IPC(8): C09B62/00D06P1/38
CPCC09B33/06C07C309/47C09B62/513
Inventor 张兴华刘文祥
Owner TIANJIN DEK CHEM
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