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Dyeing method of reactive dye containing ionic liquid

A technology of ionic liquids and reactive dyes, which is applied in dyeing methods, textiles and papermaking, etc., can solve the problems of increasing the difficulty of dyeing wastewater with reactive dyes, the easy color difference of dyed fabrics, and the low utilization rate of reactive dyes, so as to achieve high dye utilization rate, Improving the directness and penetration, reducing the effect of dyeing and fixing temperature

Inactive Publication Date: 2012-06-13
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] (1) The utilization rate of reactive dyes is not high, generally 65-80%, and the printing and dyeing process produces a large amount of colored sewage
[0004] (2) When using dyes, in order to suppress the negative charge on the fiber surface, a large amount of inorganic salts need to be consumed, which not only increases the labor intensity, but also causes the concentration of inorganic salts in the wastewater to be as high as 100,000 mg / kg or more, which greatly increases the treatment of wastewater dyed with reactive dyes. difficulty
Organic carboxylates are biodegradable in the environment and are environmentally friendly auxiliaries. Organic carboxylates have a strong effect on promoting dyeing and can reduce the amount of salt used in the dyeing process. However, excessive dyeing effect makes the dyeing process difficult to control , the dyeing levelness is poor, and the color difference is easy to appear on the dyed fabric
Organic carboxylic acid salts are solid powders like traditional inorganic salts. When they are added to the solution during the dyeing process, it takes a certain amount of time to dissolve, and uneven dissolution will lead to dyeing defects.

Method used

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  • Dyeing method of reactive dye containing ionic liquid
  • Dyeing method of reactive dye containing ionic liquid
  • Dyeing method of reactive dye containing ionic liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Add 0.1mol ethanolamine ethanol solution into a 250ml three-necked flask, slowly add lactic acid solution with the same mole number drop by drop with a dropping funnel under rapid stirring, control the dropping process for about 30-60min, during the dropping process, the solution turns from colorless to transparent Turned into a pale yellow clear solution. Raise the temperature to reflux and react for 24 hours. After the reaction was completed, the temperature was lowered to room temperature, and the stirring was stopped. The solvent ethanol was removed by evaporation with a rotator to obtain a light yellow viscous liquid. Put it into a vacuum drying oven and dry at 50°C for 48 hours. The yield of the product ionic liquid was 83%.

Embodiment 2

[0020] 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 heat up to reflux after dropping Under the state of reaction for 12-18 hours. After the reaction was completed, the temperature was lowered to room temperature, and the stirring was stopped. Separation with a separatory funnel, the product is a light yellow viscous liquid, put it into a vacuum drying oven, and dry at 50° C. for 48 hours, and the yield of the ionic liquid is 92%.

Embodiment 3

[0022] (1) Cotton fabric dyeing process containing ionic liquid

[0023] Adopt active orange K-G, active bright orange K-7R or active red K-3B, consumption is 2% (mass percentage, weight to cotton fiber), ionic liquid concentration 10-20g / L, dyeing temperature 60 ℃, bath ratio 1: 10. Dyeing time is 40min, then add sodium carbonate 20-40g / L, fix color at 60°C for 50min, wash twice with water, soap wash (95°C, soap flakes are 3g / L), 10min, wash with water and dry.

[0024] (2) Conventional cotton fabric dyeing process

[0025] Use reactive orange K-G, reactive brilliant orange K-7R or reactive red K-3B, the dosage is 2% (mass percentage, weight to cotton fiber), the concentration of sodium chloride is 40g / L, the dyeing temperature is 60°C, and the bath ratio is 1:10 , dyeing time 40min, then add sodium carbonate 20-40g / L, heat up to 90°C, fix color time 50min, wash twice with water, soap wash (95°C, soap flakes are 3g / L), 10min, wash with water and dry.

[0026] See Table 1 fo...

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Abstract

The invention relates to a dyeing method of a reactive dye containing ionic liquid. The method comprises steps such as quaternary ammonium salt ionic liquid synthesizing and reactive dye dyeing. The quaternary ammonium salt ionic liquid is prepared through a neutralization reaction of hydroxycarboxylic acid and amines in an organic solvent. An s-triazine monohalide reactive dye is adopted in dyeing. The ionic liquid is used for replacing traditional inorganic salt, and dip dyeing is carried out under a relatively low temperature, such that a dye-uptake and a fixation rate similar to those of traditional dyeing methods are obtained.

Description

technical field [0001] The invention belongs to the field of reactive dye dyeing, in particular to a dyeing method of a halogen-s-triazine type reactive dye. Background technique [0002] Reactive dyes have the characteristics of bright color, complete chromatogram, convenient application, excellent fastness, and can form covalent bonds with various fibers, so they have attracted much attention. In recent years, reactive dyes have developed rapidly, and the output has increased significantly year by year. The development speed of new varieties also ranks first among the dye varieties. However, with the development of the application practice of reactive dyes, the shortcomings of reactive dyes are gradually exposed, and the ones that have received widespread attention are: [0003] (1) The utilization rate of reactive dyes is not high, generally 65-80%, and the printing and dyeing process produces a large amount of colored sewage. [0004] (2) When using dyes, in order to s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06P1/38D06P1/66D06P3/66D06P5/10D06P5/22
Inventor 孙德帅张晓东方龙刘馨
Owner QINGDAO UNIV
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