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Anhydrous recycling dyeing method of activated dye

A technology of reactive dyes and dyeing methods, applied in the field of anhydrous and recyclable dyeing of reactive dyes, to achieve the effects of repeated reuse, promotion of adsorption and color fixation, and elimination of hydrolysis

Active Publication Date: 2015-06-03
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide an anhydrous recyclable dyeing method of reactive dyes, which realizes non-aqueous dyeing and avoids the problem that reactive dyes cannot be fixed due to hydrolysis in the dyeing process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 6.7g pure cotton plain fabric (deboiled and bleached 40×40, 133×72, 123g / m 2 ) soaked in 300mL dimethylacetamide and pre-swelled at 150°C for 1 hour. Dissolve 0.3g CI Reactive Red 24, 1.0g potassium nitrate and 1.0g pyridine in 100mL dimethylacetamide, sonicate or heat to obtain a uniform dye solution. The above-mentioned pre-swelling treated fabric exhaust dyeing solution was heated up and kept at 95° C. for 4 hours. After the dyeing bath is cooled, take out the fabric and centrifuge, wash with 100mL dimethylacetamide and collect the lotion, wash at 130°C for 20 minutes, repeat the cleaning process 3 times until the dimethylacetamide lotion is clear, combine the lotion and Dyes and auxiliaries are recovered after evaporation and concentration. The washed fabric was centrifuged and dried at 130° C. and 20 mbar for 0.5 hour to constant weight to obtain dyed fabric. The K / S of the dyed fabric is 14, the washing fastness is 4 grades, the dry rubbing fastness is 3-4 grad...

Embodiment 2

[0030] Soak 6.7g of plain cotton fabric (deboiled and bleached 40×40, 133×72, 123g / m2) in 300mL of dimethylacetamide and pre-swell at 120°C for 4 hours. Dissolve 0.6g of CI Reactive Black 5 after sulfuric acid ester elimination, 1.0g of potassium nitrate and 2.0g of pyridine in 100mL of dimethylacetamide, sonicate or heat to obtain a uniform dye solution. The above-mentioned pre-swelling treated fabric exhaust dyeing solution was heated up and kept at 95° C. for 4 hours. After the dyeing bath is cooled, take out the fabric and centrifuge, wash with 100mL dimethylacetamide and collect the lotion, wash at 130°C for 20 minutes, repeat the cleaning process twice until the dimethylacetamide lotion is clear, combine the lotion and Dyes and auxiliaries are recovered after evaporation and concentration. The washed fabric was centrifuged and dried at 130° C. and 20 mbar for 0.5 hour to constant weight to obtain dyed fabric. The K / S of the dyed fabric is 18, the washing fastness is 4 ...

Embodiment 3

[0032] Soak 6.7g of plain cotton fabric (deboiled and bleached 40×40, 133×72, 123g / m2) in 300mL of dimethylacetamide and pre-swell at 80°C for 24 hours. Dissolve 0.3g CI Reactive Red 120, 0.5g potassium nitrate and 1.0g pyridine in 100mL dimethylacetamide, sonicate or heat to obtain a uniform dye solution. The above-mentioned pre-swelling treated fabric exhaust dyeing solution was heated up and kept at 95° C. for 4 hours. After the dyeing bath is cooled, take out the fabric and centrifuge, wash with 100mL dimethylacetamide and collect the lotion, wash at 130°C for 20 minutes, repeat the cleaning process 3 times or until the dimethylacetamide lotion is clarified, and combine the lotion And recover dyes and auxiliaries after evaporating and concentrating. After replenishing the dye, salt, and alkali to the initial concentration of the dye in the dyeing residue, repeat the above steps for cyclic dyeing 10 times. The above washed fabric was centrifuged and dried at 130° C. and 2...

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Abstract

The invention relates to an anhydrous recycling dyeing method of an activated dye. The method comprises the following steps: adding the dye to a polar organic solvent; adding electrolyte and organic alkali, and dissolving, so as to obtain a dye bath, wherein the proportional relation of the dye to the polar organic solvent to the electrolyte to the organic alkali is (0.5-30g):1L:(0-10g):(0.1-30g); pre-swelling a pure cotton fabric in the polar organic solvent at 50-150 DEG C for 0.5-24 hours; then dyeing in the dye bath at 45-130 DEG C for 0.5-3 hours at the dyeing bath ratio of 1:10 to 1:50; and cleaning and drying, so as to obtain the dyed fabric. The residual dye liquid generated in the method disclosed by the invention does not contain a hydrolyzed dye, and can achieve recycling of dye liquor just by directly supplying the dye and assistants.

Description

technical field [0001] The invention belongs to the field of fabric dyeing methods, in particular to an anhydrous recyclable dyeing method of reactive dyes. Background technique [0002] Since its introduction in 1956, reactive dyes have developed rapidly due to their complete color spectrum, bright colors and convenient use, and have become the main dyes for cellulose fiber dyeing. With the increasingly serious ecological and environmental problems, the problems caused by reactive dyes have become more prominent. Reactive dye dyeing wastewater contains up to 30%-40% hydrolyzed dyes and a large amount of inorganic salts added to reactive dyes in the water dyeing process, which increases the difficulty of wastewater treatment. [0003] Dyeing in a non-aqueous system is considered to be an environmentally friendly dyeing technology that may greatly reduce the non-aqueous discharge of printing and dyeing. Such studies often use critical carbon dioxide or weakly halogenated hy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06P1/38D06P1/44D06P3/66
Inventor 陈璐怡王碧佳阮馨慧
Owner DONGHUA UNIV
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