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Preparation of dye brilliant blue KN-R

A reactive dye and esterification technology for wool, which is applied in the direction of azo dyes, organic dyes, reactive dyes, etc., can solve the problem of incomplete esterification of chromophores, and achieve good results and improved quality

Inactive Publication Date: 2009-07-15
TIANJIN DEK CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The esterification of chromophore in the esterification step in the current preparation method is not complete enough

Method used

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

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0010] 1. Ingredients list:

[0011] raw material name molecular weight molecular ratio Percent consumption (Kg) Feeding amount (mole) bromide 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

[0012] 2, dyestuff preparation technology of the present invention operates as follows:

[0013] (a) Condensation: Dissolution of bromaline and meta-oil: add 200ml of bottom water to a four-neck bottle, add 80.8g of bromaline and 48.2g of meta-oil, raise the temperature, control the temperature to 95°C, and dissolve all the materials , keep warm for 10 minutes, lower the temperature to 80°C to obtain a mixed solution; dissolve 1.99g of cuprous oxide in 1.2g of DMF, then add it and 0.4g of electrolytic copper powder into the above mix...

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Abstract

The invention relates to a method for preparing an improved reactive dye brilliant blue KN-R. The preparation method improves color radicle esterification rate, quality, color fixing rate and hoisting rate. Specifically, the invention provides a method for preparing a reactive dye brilliant blue KN-R used for fur, the method comprises condensation, refining, esterification and dilution of bromamine acid and metaposition oil and is characterized in that in esterification, 100% sulphuric acid is adopted, so that chromophore esterification is more complete.

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 Brilliant 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 of environmental and ecological constraints, the requirements for the production and preparation of reactive dyes, color uptake rate, color fixation rate and dyeing wastewater are getting higher and higher. Existing a kind of brilliant blue reactive dye, its structural formula is as shown in (I): [0003] [0004] The dye industry calls it Reactive Brilliant Blue KN-R. At present, the active brilliant blue KN-R dye in the industry is condensed with bromine and meta-oil under the action of a catalyst in the preparation process, and then refined twice...

Claims

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Application Information

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IPC IPC(8): C09B62/505
Inventor 张兴华邢广文李荣才
Owner TIANJIN DEK CHEM
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