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Preparation of brilliant blue KN-R

A technology of reactive dyes and sodium bicarbonate for wool, used in chemical instruments and methods, azo dyes, organic dyes, etc. quick effect

Inactive Publication Date: 2013-01-16
TIANJIN DEK CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the current preparation method, the filtration temperature is too high, and the filtration is prone to clogging the filter screen. The method of the present invention overcomes the above-mentioned technical problems

Method used

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  • Preparation of brilliant blue KN-R
  • Preparation of brilliant blue KN-R

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] 1. Ingredients list:

[0012] raw material name

molecular weight

Molecular ratio

100% dosage (Kg)

Feeding amount (mol)

Bromoamic acid

404

1.0

80.8

0.2

meta oil

201

1.2

48.2

0.24

sodium bicarbonate

84

4.0

67.2

0.8

Cuprous Chloride

199

0.05

1.99

0.01

Electrolytic copper powder

64

0.15

0.4

0.0063

Sulfuric acid

98

40.8

800

8.16

DMF (Dimethylformamide)

1.2

[0013] 2. The dye preparation process of the present invention operates as follows:

[0014] (a) Condensation: the dissolving of bromamic acid and meta-position oil: add bottom water 200ml in the four-necked flask, add 80.8g of bromo-acid, the meta-position oil of 48.2g, heat up, control temperature 95 ℃, all materials are dissolved , keep the temperature for 10 minutes, cool down ...

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Abstract

The invention relates to a method for preparing a reactive dye KN-R used for fur. The method comprises condensation, refining, esterification and dilution of bromamine acid and metaposition oil; wherein dilution in the invention is improved and is carried out below 0 DEG C while the pH value is adjusted to 8.0-9.0, so that filtration efficiency and yield are improved.

Description

technical field [0001] The invention relates to a preparation method of a reactive dye, in particular to an improved preparation method of a reactive dye bright blue KN-R suitable for dyeing pure cotton. Background technique [0002] Reactive dyes have the remarkable characteristics of bright color, excellent application performance, convenient use and strong applicability. In the 21st century, due to the economic factors restricted by the environment and ecology, the requirements for the production and preparation of reactive dyes, the coloring rate, the color fixing rate and the dyeing wastewater are getting higher and higher. Existing a kind of brilliant blue reactive dye, its structural formula is shown in (I): [0003] [0004] The dye industry calls it reactive brilliant blue KN-R. At present, the reactive brilliant blue KN-R dyes in the industry are all condensed with bromo-amino acid and meta-oil under the action of a catalyst in the preparation process, and the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09B62/505
Inventor 张兴华邢广文李荣才
Owner TIANJIN DEK CHEM
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