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Method for recycling and utilizing dyeing liquor of dye for a full polyamide fabric

A technology for dyeing liquid and dyeing residue, which is applied in the fields of dyeing, textiles and papermaking, can solve the problems of long processing time, high operation and recycling costs, and achieve the effect of reducing sewage discharge and production costs

Inactive Publication Date: 2018-12-04
SHAOXING XINGMING DYEING & FINISHING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the deficiencies of the prior art, the present invention provides a method for recycling the dyeing solution for all-nylon fabrics, which can be directly reused for dyeing and energy-saving of the next batch of all-nylon fabrics by adjusting the process without undergoing complex treatments such as decolorization. Emission reduction and other advantages solve the technical problems of dyeing liquid recovery and treatment methods, long processing time, high operation and reuse costs

Method used

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  • Method for recycling and utilizing dyeing liquor of dye for a full polyamide fabric
  • Method for recycling and utilizing dyeing liquor of dye for a full polyamide fabric
  • Method for recycling and utilizing dyeing liquor of dye for a full polyamide fabric

Examples

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Effect test

Embodiment 1

[0040](1) Use a 500ml graduated cylinder to measure 200mL of the above standard dye solution into a 250mL glass dyeing cup, add 1g of sodium chloride, stir and dissolve completely, put the full nylon fabric soaked in warm water and squeezed dry in advance into the dyeing solution to start dyeing , and place the glass dyeing cup in a constant temperature water bath and heat it up to 40°C. At 40°C, dye at a constant temperature for 5 minutes, then at a heating rate of 1°C / min, raise the temperature to 90°C, and at 90°C, dye at a constant temperature for 30 minutes. After dyeing, take out the all-nylon fabric for washing and drying;

[0041] (2) Add distilled water to the dyeing residue in step (1), dilute to the scale of the 250mL glass dyeing cup, use a 5mL pipette to draw 4mL of the residue into a 50mL volumetric flask, dilute to the mark with distilled water, Under the maximum absorption wavelength λmax, measure the absorbance A of the dyeing residue, read the corresponding d...

Embodiment 2

[0045] (1) Add distilled water to the dyeing residue in step (3) of Example 1, dilute to the scale of the 250mL glass dyeing cup, draw 4mL of the residue into a 50mL volumetric flask with a 5mL pipette, and dilute to the mark with distilled water , under the maximum absorption wavelength λmax of the standard dye, measure the absorbance A of the dyeing residue, read the corresponding dye concentration (c%) on the working curve, and calculate the dye content in the dyeing residue;

[0046] (2) Supplement the required dye and leveling agent to the dyeing residue in step (1), adjust the pH value to be the same as the stock solution, draw 4mL of recycled dyeing solution in a 50mL volumetric flask with a 5mL pipette, and dilute it with distilled water to Scale, under the maximum absorption wavelength λmax of the standard dye, measure the absorbance A of the recycled dyeing solution, the result is the same as the absorbance A of the dyeing stock solution, and make the second reused dy...

Embodiment 3

[0049] (1) Add distilled water to the dyeing residue in step (3) of Example 2, dilute to the scale of the 250mL glass staining cup, draw 4mL of the residue into a 50mL volumetric flask with a 5mL pipette, and dilute to the mark with distilled water , under the maximum absorption wavelength λmax of the standard dye, measure the absorbance A of the dyeing residue, read the corresponding dye concentration (c%) on the working curve, and calculate the dye content in the dyeing residue;

[0050] (2) Supplement the required dye and leveling agent to the dyeing residue in step (1), adjust the pH value to be the same as the stock solution, draw 4mL of recycled dyeing solution in a 50mL volumetric flask with a 5mL pipette, and dilute it with distilled water to scale, under the maximum absorption wavelength λmax of the standard dye, measure the absorbance A of the recycled dyeing solution, the result is the same as the absorbance A of the dyeing stock solution, and the third reused dyeing...

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Abstract

The invention discloses a method for recycling and utilizing a dyeing liquor of a dye for a full polyamide fabric. The method comprises following steps: picking a dye at first, taking distilled wateras a medium, preparing a dyeing stock solution, measuring the absorbance of the dyeing stock solution, carrying out dyeing, then collecting residual dyeing liquor, based on the amount of water consumed in dyeing, adding tap water into the residual dyeing liquor until the volume of consumed water is completely recovered, measuring the absorbance of the residual dyeing liquor, comparing the absorbance with that of the dyeing stock solution, calculating the content of the dye in the residual liquor, then adding needed dye and a leveling agent into the residual liquor, adjusting the pH value untilthe pH value is equal to that of the stock solution, using the residual liquor to dye a polyamide fabric, and repeating the previous step for a second time and a third time. The provided method doesnot contain any complicated treatment such as discoloring. The technology is adjusted, the processed dyeing liquor can be used to dye a next batch of polyamide fabrics, the dyeing liquor can be recovered and processed, and solved are problems that the processing time is long, and the operation cost and the reuse cost are high.

Description

technical field [0001] The invention relates to the technical field of dyeing solution recycling, in particular to a method for recycling dyeing solution for all-nylon fabrics. Background technique [0002] According to incomplete statistics, the daily discharge of residual liquid in printing and dyeing factories across the country reaches 3×10 6 -4×10 6 With the increasingly stringent discharge standards and rising water and sewage charges, the reuse of printing and dyeing wastewater has attracted people's attention. The United States and Europe began research on the reuse of dyeing wastewater as early as the 1980s and 1990s. Most of them used oxidation decolorization or membrane separation technology to degrade and decolorize the dyeing residue, and then reuse it in the dyeing process. In recent years, research in this field has been gradually carried out in China. [0003] Nylon has a wide range of applications, and acid dyes are mostly used for dyeing. Traditional ads...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06P1/16D06P1/39D06P1/00D06P1/38D06P1/673D06P3/24D06P3/26
CPCD06P1/0008D06P1/0032D06P1/16D06P1/38D06P1/39D06P1/67358D06P3/241D06P3/245D06P3/248D06P3/26
Inventor 钟建军
Owner SHAOXING XINGMING DYEING & FINISHING CO LTD
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