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Ionic liquid dyeing method of reactive dyes

An ionic liquid and reactive dye technology, applied in dyeing, textile and papermaking, etc., can solve the problems of high cost and high usage, and achieve the effects of reducing emissions, reducing water consumption, and reducing use costs

Inactive Publication Date: 2016-02-24
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention aims at the problem that the amount of organic carboxylate used as a substitute salt is relatively high and the cost is high, and a temperature-sensitive ionic liquid is used instead. The ionic liquid can be separated from the dyeing system when the temperature is lowered to room temperature, and then recycled and reused. Realize low-cost dyeing process of reactive dye substitute salt

Method used

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  • Ionic liquid dyeing method of reactive dyes
  • Ionic liquid dyeing method of reactive dyes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Add 0.3mol triethanolamine ethanol solution into a 250mL three-necked flask, slowly add 0.1mol citric acid ethanol solution drop by drop with a dropping funnel under rapid stirring, control the dropping process for about 30-60min, and raise the temperature to reflux after the dropping is completed State reaction for 12-18 hours. After the reaction was completed, the temperature was lowered to room temperature, and the stirring was stopped.

[0026] Cool the above solution to 50°C, add 65g of water and 265g of ethanol to make a dyeing solvent for later use. Take part of the diluted ionic liquid solution (dyeing bath ratio 1:10), heat up to 40°C, add reactive brilliant orange K-7R in an amount of 2% (mass percentage, weight on cotton fiber), and configure the dyeing solution. Add the cotton fabric into the dyeing solution, raise the temperature to 60°C at a rate of 2°C / min, and dye at a constant temperature for 40 minutes. After dyeing, take out the cotton fabric and tak...

Embodiment 2

[0028] Add 0.3mol triethanolamine ethanol solution into a 250mL three-necked flask, slowly add 0.1mol L-malic acid ethanol solution drop by drop with a dropping funnel under rapid stirring, and control the dropping process for about 30-60min. During the dropping process, the solution From colorless and transparent to light yellow clear solution. Raise the temperature to reflux and react for 24 hours. After the reaction, the temperature was lowered to room temperature, the stirring was stopped, and the liquid was separated to obtain a light yellow viscous liquid. Put it into a vacuum drying oven and dry at 50°C for 48 hours.

[0029] Add the synthesized ionic liquid (concentration: 10 g / L) into the ethanol / water mixed solution (mass ratio 9:1), raise the temperature to 40° C., and dissolve the ionic liquid. Add reactive blue K-BR therein, consumption is 4% (mass percentage, with respect to cotton fiber weight), configure dyeing solution. Add the cotton fabric into the dyeing...

Embodiment 3

[0031] The waste dyeing solution in Example 1 was cooled to room temperature, the ionic liquid was separated out by layers, and the ionic liquid was separated by liquid separation, which was directly used in the secondary dyeing process of reactive orange K-7R.

[0032] Add the synthesized ionic liquid (concentration: 12 g / L) into the ethanol / water mixed solution (mass ratio 9:1), raise the temperature to 40° C., and the ionic liquid dissolves. The dosage of reactive bright orange K-7R is 2% (mass percentage, relative to cotton fiber weight), and the dyeing solution is configured. Add cotton fabric into the dyeing solution, raise the temperature to 60°C at a rate of 2°C / min, and dye at a constant temperature for 40 minutes. After dyeing, take out the cotton fabric and take out part of the liquid to make the fabric carry 30-40% liquid. Add the fabric to 10g / L sodium carbonate color-fixing solution, the ratio of ethanol / water in the color-fixing solution is 8:2, raise the temperat...

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Abstract

The invention relates to a reactive dye dyeing method through ionic liquid. The reactive dye dyeing method comprises the steps of synthesis of quaternary ammonium ionic liquid, alcohol / water mixed solvent dyeing of the reactive dyes, recycling of the ionic liquid, and the like. The quaternary ammonium ionic liquid is prepared through the neutralization reaction of hydroxy carboxylic acid and amines in an alcohols solvent, and the obtained ionic liquid solution is diluted and is used for the solvent dyeing of monochlorotriazine reactive dyes. The dip dyeing is carried out at a relatively low temperature, so that relatively high dye-uptake and fixation rate are achieved; the waste liquor of the dyeing solution is cooled to the room temperature, the ionic liquid in the waste liquor is subjected to stratified precipitation, and the ionic liquid is recycled through liquid separation.

Description

technical field [0001] The invention belongs to the field of reactive dye dyeing, in particular to a reactive dye dyeing method using ionic liquid. Background technique [0002] Reactive dyes have the characteristics of bright color, complete chromatogram, convenient application and excellent fastness, and can form covalent bonds with various fibers, so they become important dyes for cellulose fiber dyeing. However, with the development of the application practice of reactive dyes, the shortcomings of reactive dyes are gradually exposed. The most prominent problems are the low dyeing rate and fixation rate, and the low utilization rate of dyes. In the traditional dyeing process, in order to improve the dyeing The dyeing rate and color fixing rate need to add a large amount of inorganic salt to promote dyeing. According to the structure of the dye and the nature of the dyed fabric, the amount of salt ranges from 30-150g / L, resulting in the concentration of inorganic salt in t...

Claims

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Application Information

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IPC IPC(8): D06P1/00D06P1/38D06P1/66D06P3/66
CPCD06P1/38D06P1/0004D06P1/66D06P3/66
Inventor 孙德帅张晓东方龙张中一姜鹏
Owner QINGDAO UNIV
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