Cooperative pretreatment method for biological catalysis and controlled oxidation of cotton and cotton-type fabrics

A cotton-type fabric and biocatalysis technology, which is applied in biochemical fiber treatment, fiber treatment, textiles and papermaking, etc., can solve the problem of high COD/BOD value, achieve the effect of reducing the amount of waste water, the effect is obvious, and the process adaptability is strong.

Inactive Publication Date: 2011-09-21
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional alkali refining process consumes a lot of energy such as fresh water and steam, and the alkaline wastewater produced makes the COD / BOD value quite high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Specifications of gray cloth: pure cotton woven fabric, mass per unit area 300g / m 2

[0033] Biological compound enzyme preparation HD-100: 5g / L, biological enzyme synergist HD-101: 1g / L, JFC: 1g / L, pH value is about 7.

[0034] Desizing process:

[0035] Cloth feeding (gray cloth after singeing) - room temperature padding and desizing working solution (moisture rate 100%) - heat preservation at 60°C for 1 hour.

[0036] Bleach Prescription: H 2 o 2 (100%): 15g / L, hydrogen peroxide controlled decomposition assistant HD-181: 10g / L, JFC: 1g / L, adjust the pH value to 11.

[0037] Steaming process:

[0038] Cloth feeding (after desizing)——Two-compartment flat wash tank for padding in cold water at room temperature (60% rolling rate)——Padding with oxygen bleaching working solution (at room temperature, 100% rolling rate)——Steam box at 98-102°C Treatment for 70 minutes—washing in two flat washing tanks at 85°C—washing in flat washing tanks at 60°C—washing in flat washin...

Embodiment 2

[0041] Specifications of gray cloth: pure cotton woven fabric, mass per unit area 200g / m 2

[0042]Biological compound enzyme preparation (wherein the mass percent of amylase, pectinase, cellulase, pulp enzyme, cutinase, protease and lipase is: 27-32%: 12-17%: 10-16%: 15-19% %: 9-12%: 8-13%: 6-9%) 6g / L, biological enzyme synergist (mass percentage is 13-22%: 32-44%: 41-52% sorbitol, chlorinated Calcium, calcium lactate complex) 1.5g / L, JFC 1g / L, pH value around 7.

[0043] Desizing process:

[0044] Feed cloth (gray cloth after singeing)——Room temperature padding and desizing working solution (100%)——Insulate at 60°C for 1 hour.

[0045] Bleach Prescription: H 2 o 2 (100%) 13g / L, hydrogen peroxide controlled decomposition assistant (mass percentage 10-18%: 20-24%: 13-18%: 11-17%: 15-21%: 17-22%: Nano hydrated silica, polyphosphonate, sodium tripolyphosphate, sodium hexametaphosphate, sodium pyrophosphate, compound of polyethylene polyamine polyalkylene phosphonate) 13g / L...

Embodiment 3

[0050] Specifications of gray fabrics: polyester-cotton woven fabric (T65 / C35), mass per unit area 200g / m 2

[0051] Biological compound enzyme preparation (wherein the mass percent of amylase, pectinase, cellulase, pulp enzyme, cutinase, protease and lipase is: 27-32%: 12-17%: 10-16%: 15-19% %: 9-12%: 8-13%: 6-9%) 3g / L, biological enzyme synergist (mass percentage is 13-22%: 32-44%: 41-52% sorbitol, chlorination Calcium, calcium lactate complex) 2g / L, JFC 1g / L, pH value around 7.

[0052] Desizing process:

[0053] Feed cloth (gray cloth after singeing)——Room temperature padding and desizing working solution (100%)——Insulate at 60°C for 1 hour.

[0054] Bleach Prescription: H 2 o 2 B Compounds of diamine tetramethylene phosphonic acid, diethylene triamine pentaacetic acid, ethylenediamine tetraacetic acid, diethylene triamine penta methylene phosphonic acid, maleic acid, phytic acid) 9g / L, JFC 2g / L, adjust the pH value to 11.

[0055] Steaming process:

[0056] Cloth...

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PUM

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Abstract

The invention relates to a cooperative pretreatment method for biological catalysis and controlled oxidation of cotton and cotton-type fabrics, comprising the following steps: (1) preparing a biological compound enzyme preparation, a biological enzyme synergist and a non-ionic surfactant into an enzyme working solution, wherein the pH of a processing bath is 6-7.5; padding the fabrics into the working solution; carrying out heat preservation; (2) washing the processed fabrics with cold water; padding the fabrics into a hydrogen peroxide bleaching solution containing the controlled decomposition additive of hydrogen peroxide; and steaming, washing with water and drying to obtain the finished products. In the method, high-density strong base is not required to serve as a scouring agent, thepH value of pretreatment waste water is 7-8, the chromaticity is low, the COD (Chemical Oxygen Demand) value is lowered by 30% compared with that of the traditional alkali kiering pretreatment technology, the water is saved by 10-30%, and the steam and electricity can be saved by 20%. The indexes (whiteness, capillary effect, water absorption, cotton seed hull strainaway rate, desizing rate, strong force and the like) of the processed cotton and cotton-type fabric all reach the quality indexes of a semi-product, cotton seed hulls can be completely removed, and the fabrics have vivid color andgood levelling property after being dyed.

Description

technical field [0001] The invention belongs to the field of pretreatment of fabrics, in particular to a biocatalysis and controlled oxidation synergistic pretreatment method for cotton and cotton fabrics. Background technique [0002] The heavy pollution process before printing and dyeing of cotton and cotton-type fabrics (cotton and other natural or synthetic fiber blended or interwoven fabrics) mainly includes three chemical wet treatment processes: desizing, scouring and bleaching. Its main task is to remove the size on the gray cloth and the natural impurities in the cotton fiber to ensure the smooth progress of the subsequent dyeing and finishing process. [0003] When weaving, in order to weave smoothly, warp yarns should be sized before weaving. Sizing is beneficial to weaving, but it brings difficulties to the subsequent dyeing and finishing process. The size on the gray cloth will contaminate the finishing fluid and hinder the penetration of the dyeing material in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M16/00C12S11/00D06L1/12D06L1/14D06L3/02D06M101/06D06L4/12D06L4/13
Inventor 阎克路李戎王建庆侯爱芹胡婷莉黄劲旭
Owner DONGHUA UNIV
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