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 effect of promoting adsorption and color fixation, avoiding unfixable color, and realizing repeated reuse
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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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