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Reactive navy blue dye and preparation method thereof

A reactive navy blue and dye technology, applied in the field of reactive navy blue dye and its preparation, can solve problems such as poor fastness, dull shade, damage to human skin, etc., and achieve the effects of reducing usage, bright color, and eliminating pollution

Active Publication Date: 2010-05-19
TIANJIN DEK CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the fabrics dyed by weak acid dyes have poor fastness and not bright shade, especially the pollution of heavy metals in the manufacturing process of metal complex dyes and the pollution during dyeing, and the damage of dyed nylon fabrics to human skin

Method used

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  • Reactive navy blue dye and preparation method thereof
  • Reactive navy blue dye and preparation method thereof
  • Reactive navy blue dye and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0065] Prepare the compound of following structural formula (VII)

[0066]

[0067] (a) Add bottom water in the reaction kettle, add 13.8 kilograms of p-nitroaniline, stir and dissolve, add quantitative 30% hydrochloric acid solution, add crushed ice cubes, make the solution mass / volume (g / ml) concentration be 10 %, then add 30% sodium nitrite solution, keep the pH of the solution < 2 during the reaction, the starch potassium iodide test paper is slightly blue after soaking, keep the temperature at 15°C, react for 2 hours, and use sulfamic acid to eliminate excess nitrite nitric acid, diazo solution.

[0068] (b) Prepare 32.7 kg of H acid into an aqueous solution, adjust the pH value to 6.8-7.2, add it dropwise to the diazonium solution in step (a), keep the temperature at 10°C, and react for 6 hours to obtain an acidic coupling solution.

[0069] (c) Add bottom water to the reaction kettle, add 27.5 kg of para-ester, stir to dissolve, adjust pH=3.5-4.0 with baking soda, m...

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PUM

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Abstract

The invention relates to a reactive navy blue dye and a preparation method thereof, wherein the dye has the following structural formula (I), and the preparation method of the dye comprises the following steps of: a. adding a hydrochloric acid solution and a sodium nitrite solution into meta(para)-nitroaniline to obtain a diazo liquid; b. dropwise adding an H acid into the diazo liquid obtained in the step a for reaction to obtain an acidic coupling liquid; c. dissolving para-ester into water to obtain a para-ester solution; d. adding the para-ester solution obtained in the step c into a cyanuric chloride suspension for reaction, and adding para-phenylene diamine after the reaction is finished; e. adding the hydrochloric acid solution into a condensation reaction liquid obtained in the step d, and then adding the sodium nitrite solution to obtain the diazo liquid; f. dropwise adding the diazo liquid obtained in the step e into the acidic coupling liquid obtained in the step b to obtain an alkaline coupling liquid; and g. transforming beta-sulfuric ester ethyl sulfone into vinyl sulfuryl under an alkaline condition of the coupling liquid obtained in the step f, thereby preparing a compound with the structural formula (I), wherein R1 is H and R2 is NO2, or R2 is H and R1 is NO2.

Description

technical field [0001] The invention relates to a dye and a preparation method thereof, in particular to a reactive navy blue dye and a preparation method thereof. Background technique [0002] The dyes generally used in the dyeing of nylon fabrics are weak acid dyes and metal complex dyes. The fabrics dyed by weak acid dyes have poor fastness and not bright shade, especially the pollution of heavy metals in the manufacturing process of metal complex dyes and the pollution during dyeing, as well as the damage of dyed nylon fabrics to human skin. Due to environmental and ecological constraints, the requirements for dyeing rate, color fixing rate and dyeing wastewater are getting higher and higher. The development of navy blue reactive nylon dyes has always been a hot spot in the dye industry, because navy blue is the most used in all shades and is the main component of black spelling. The invention provides a reactive navy blue dye suitable for nylon dyeing, which solves th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B62/513D06P1/384D06P3/28D06P3/68
Inventor 张兴华李荣才
Owner TIANJIN DEK CHEM
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