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Method for dyeing textiles with dye liquor prepared from miscible organic solvent and water

A technology of organic solvents and textiles, applied in dyeing, textiles and papermaking, etc., can solve the problems of poor economy, toxic substances, solvent loss and other problems of perchlorethylene solvent dyeing, so as to improve the balance dyeing percentage and increase the activity , Improve the effect of equilibrium adsorption

Inactive Publication Date: 2019-04-23
余姚市立帅印染有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the organic solvent tetrachlorethylene used in this process is a toxic substance and pollutes the environment. At the same time, the solvent is not recovered, and the solvent remaining on the fiber after dyeing will also cause solvent loss, so that the economy of tetrachlorethylene solvent dyeing is not good.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] According to the above process steps: select cotton textiles as the textiles to be dyed, the bath ratio is 1: 25, the weight of the fabric is 2% reactive red B-3BF, the volume fraction is 10% water and the volume fraction is 90% ethanol Mix well and adjust the pH to 7. Cut 1g of cotton textiles, prepare 50g / L of sodium chloride solution, soak the cotton textiles twice in sodium chloride solution, and the pressure of rolling is 10KN, and the rolling speed of textiles is 5 m / min. The liquid rate is 70%. Then put the rolled textiles into a room temperature dyeing machine filled with a dye solution prepared at a temperature of 25°C. The dye solution is gradually heated up to 50°C at a speed of 5°C / min for oscillating dyeing, and the oscillation frequency is 60 times / min. The ethanol in the liquid is recovered by the reflux condensation device during the dyeing process. Add 1mL of sodium carbonate solution to the residual solution of ethanol extracted in the dyeing machine...

Embodiment 2

[0029] According to the above process steps: select cotton textiles as the textiles to be dyed, the bath ratio is 1: 30, and the reactive red B-3BF that is 4% to the fabric, the water with a volume fraction of 30% and the isophthalic acid with a volume fraction of 70% are selected. Mix propanol evenly and adjust the pH to 7. Cut 1g of cotton textiles, prepare 50g / L of sodium sulfate solution, soak the cotton textiles twice in sodium sulfate solution, the pressure of rolling is 25KN, the speed of textiles passing through the rolls is 20 m / min, the rate of liquid carrying after the rolling of textiles 80%. Then put the rolled textiles into a normal temperature dyeing machine filled with a dye solution prepared at a temperature of 30°C. The dye solution is gradually heated up to 60°C at a rate of 5°C / min for oscillating dyeing, and the oscillation frequency is 80 times / min. The ethanol in the liquid is recovered by the reflux condensation device during the dyeing process. Add 1...

Embodiment 3

[0031]According to the above process steps: select cotton textiles as the textiles to be dyed, the bath ratio is 1:40, and the direct scarlet 4BS with a weight of 5% to the fabric, water with a volume fraction of 40% and ethanol with a volume fraction of 60% are uniformly mixed , adjust the pH to 7. Cut 1g of cotton textiles, prepare 50g / L sodium chloride solution, soak the cotton textiles twice in the sodium chloride solution, and roll them at a pressure of 35KN. The rolling speed of the textiles is 50 m / min. The liquid rate is 90%. Then put the rolled textiles into a room temperature dyeing machine filled with a dye solution prepared at a temperature of 40°C. The dye solution is gradually heated up to 80°C at a speed of 5°C / min for oscillating dyeing, and the oscillation frequency is 90 times / min. The ethanol in the liquid is recovered by the reflux condensation device during the dyeing process. Add 1mL of sodium carbonate solution to the residual liquid of ethanol extract...

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Abstract

The invention relates to a method for dyeing textiles with dye liquor prepared from a miscible organic solvent and water, and belongs to the technical field of textile printing, dyeing and processing.The dye liquor is prepared from an organic solvent which is soluble in water and is lower than the water in boiling point, and a dye is soluble in the water and is insoluble in the organic solvent, so that an effective bath ratio is lowered, the distribution coefficient of the dye on fiber is changed, and the dye uptake of the dye is improved. By adding the organic solvent, the boiling point of the dye is lowered, energy is saved, and the water usage amount is reduced greatly during dyeing; the organic solvent can be recycled, so that the discharge of waste liquid is reduced. In a dyeing process, the textiles are soaked and rolled twice in an accelerating agent solution, so that the precipitation of a large amount of solid accelerating agent, which is insoluble in the organic solvent, added during dyeing is avoided. The dyeing method has the advantages of small water usage amount, higher utilization rate of the dye, and low energy consumption; the organic solvent can be recycled, andmeanwhile clean dyeing is realized.

Description

technical field [0001] The invention relates to a method for dyeing textiles by using a dye liquor miscible with organic solvents and water, and belongs to the technical field of textile printing and dyeing. Background technique [0002] In the conventional dyeing process, water is used as the carrier of the dye for dyeing. Water is a good solvent, and all the auxiliary agents such as salts and color fixing agents required in the dyeing process can be dissolved in water, so a large amount of water resources are required. However, for reactive dyes, the dye undergoes a hydrolysis reaction in water. During the color fixing process, due to the alkaline condition, the dye will be alkaline hydrolyzed again, which reduces the color fixing efficiency and dye utilization rate. And after using water as the carrier of the dyestuff, it cannot be recycled and reused. After dyeing, a large amount of waste water will be discharged, which seriously pollutes the environment and wastes resou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06P1/16D06P1/38D06P1/39D06P1/44D06P1/651D06P3/24D06P3/26D06P3/52D06P3/54D06P3/60D06P3/66D06P3/70D06P3/72D06P3/74D06P5/10
CPCD06P1/38D06P1/16D06P1/39D06P1/445D06P1/65118D06P3/241D06P3/26D06P3/521D06P3/528D06P3/54D06P3/6008D06P3/6033D06P3/66D06P3/708D06P3/72D06P3/74D06P5/10
Inventor 周静
Owner 余姚市立帅印染有限公司
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