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Low-alkali pretreatment method for in-situ catalytic degradation of impurities in cotton and cotton fabrics

A technology of cotton-type fabric and in-situ catalysis, which is applied in biochemical fiber treatment, fiber treatment, plant fiber, etc., can solve the problems of difficult degradation and reduce the biodegradability of desizing wastewater, and achieve easy treatment, reduced energy consumption, strong The effect of adaptability and flexibility

Inactive Publication Date: 2013-03-20
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the BOD / COD of PVA is only 0.064, which greatly reduces the biodegradability of desizing wastewater, and is difficult to degrade in the natural environment, resulting in a series of health, environmental and ecological problems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Specifications of gray cloth: pure cotton woven fabric, mass per unit area 300g / m 2 .

[0041] Desizing working solution is enzyme working solution: the concentration of biological compound enzyme preparation is 6g / L, the concentration of biological enzyme synergist is 2g / L, the concentration of nonionic surfactant fatty alcohol polyoxyethylene ether is 4g / L, The pH is 6; the biological compound enzyme preparation is 10 parts by mass of amylase, 4 parts of pectinase, 3 parts of cellulase, 5 parts of pulp enzyme, 3 parts of cutinase, 2 parts of protease and 1 part of lipase The complex of biological enzyme synergist whose components are calculated as the complex of 10 parts of calcium lactate, 5 parts of calcium chloride and 2 parts of sorbitol in parts by mass.

[0042] Desizing process:

[0043] Cloth feeding (gray cloth after singeing) - padding and desizing working fluid (20°C, squeeze rate 110%) - heat preservation at 20°C for 16 hours.

[0044] Oxygen bleach wor...

Embodiment 2

[0049] Specifications of gray cloth: pure cotton woven fabric, mass per unit area 300g / m 2 .

[0050] Desizing working solution is enzyme working solution: the concentration of biological compound enzyme preparation is 4g / L, the concentration of biological enzyme synergist is 2g / L, and the concentration of nonionic surfactant polyoxyethylene sorbitan fatty acid ester is 3g / L, pH is 7; the biological compound enzyme preparation is 10 parts by mass of amylase, 6 parts of pectinase, 5 parts of cellulase, 7 parts of pulp enzyme, 5 parts of cutinase, 4 parts of protease and A compound of 3 parts of lipase; a biological enzyme synergist whose components are a compound of 10 parts of calcium lactate, 9 parts of calcium chloride and 4 parts of sorbitol in parts by mass.

[0051] Desizing process:

[0052] Cloth feeding (grey cloth after singeing) - padding and desizing working solution (30°C, liquid squeeze rate 110%) - heat preservation at 30°C for 15 hours.

[0053] Oxygen bleach...

Embodiment 3

[0058] Specifications of gray cloth: pure cotton woven fabric, mass per unit area 200g / m 2

[0059] Desizing working solution is enzyme working solution: the concentration of biological compound enzyme preparation is 4g / L, the concentration of biological enzyme synergist is 2g / L, and the concentration of nonionic surfactant ethylphenyl polyethylene glycol is 2g / L L, pH 7.5; wherein the biological compound enzyme preparation is 10 parts by mass of amylase, 5 parts of pectinase, 4 parts of cellulase, 6 parts of pulp enzyme, 4 parts of cutinase, 3 parts of protease and lipase A compound of 2 parts; the composition of the biological enzyme synergist is a compound of 10 parts of calcium lactate, 7 parts of calcium chloride and 3 parts of sorbitol in terms of mass parts.

[0060] Desizing process:

[0061] Cloth feeding (gray cloth after singeing) - padding and desizing working fluid (45°C, squeeze rate 100%) - heat preservation at 60°C for 1 hour.

[0062] Oxygen bleach working ...

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Abstract

The invention relates to a low-alkali pretreatment method for the in-situ catalytic degradation of impurities in cotton and cotton fabrics, which comprises the following steps: (1) preparing a biological compound enzyme preparation, a biological enzyme synergist and a nonionic surfactant into enzyme working fluid; padding a fabric in the enzyme working fluid; and carrying out heat preservation on the fabric; and (2) directly padding the treated fabric into hydrogen peroxide bleaching liquid containing a hydrogen peroxide controlled decomposing additive, and then steaming, washing and drying the fabric. According to the invention, sizes and impurities are subjected to in-situ catalytic degradation in fabrication processing, therefore, an effect of ultrahigh-concentration wastewater treatment is achieved, fabrics are easy to wash, the washing temperature and washing frequency are reduced, more than 25% of water is saved, more than 30% of steam is saved, and more than 10% of electricity is saved. The COD (chemical oxygen demand) value is reduced by more than 30% in comparison with that of a traditional alkali scouring process, the B / C value of pretreated wastewater is about 0.4, and the biodegradability is improved. All indexes (such as whiteness, capillary effect, cottonseed hull removal rate, desizing ratio, strength, and the like) of treated cotton and cotton fabrics meets the quality requirements of semi-finished products.

Description

technical field [0001] The invention belongs to the field of pretreatment of fabrics, and relates to a low-alkali pretreatment method for in-situ catalytic degradation of impurities in cotton and cotton-type fabrics, in particular to an enzyme-treated fabric directly padding containing hydrogen peroxide without washing. A low-alkali pretreatment method for cotton and cotton-type fabrics of hydrogen peroxide bleaching solution with controlled decomposition auxiliary agent, specifically a kind of enzyme-treated fabric without water washing directly padding containing hydrogen peroxide controlled decomposition auxiliary agent A low-alkali pretreatment method for in-situ catalytic degradation of impurities in cotton and cotton-type fabrics that uses hydrogen peroxide bleach, does not require strong alkali scouring, and only needs a small amount of alkali to adjust the pH value. Background technique [0002] my country is the largest textile producer and exporter in the world. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M16/00D06L3/02D06M101/06D06L4/12D06L4/13
Inventor 阎克路胡婷莉李戎王建庆侯爱芹黄劲旭张耀鹏江楠楠范苏娜邵惠丽胡学超
Owner DONGHUA UNIV
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