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An enzyme solution and process for treating waste polyester-cotton fabrics

A technology of polyester-cotton fabric and enzyme solution, which is applied in fiber treatment, biochemical fiber treatment, plant fiber, etc., can solve the problems of fiber separation obstruction of different components, consumption of manpower, material resources and time, air pollution, etc., to improve the ability of degradation and decolorization, The effect of short reaction time and non-toxic and harmless solvent

Active Publication Date: 2016-04-13
青岛福创环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has a long process and complicated process, and air pollution will be generated after the solvent volatilizes.
A company in my country strips the discarded pure polyester clothing of the same color from buttons, zippers, etc., then removes non-polyester fibers, uses a crusher to process pure polyester, and performs liquid-phase viscosity increase through glycololysis reaction. The melt is then fine-filtered. This process requires the selection of waste clothes of the same color, and only for polyester fibers, which generates a lot of labor costs and consumes a lot of manpower, material resources and time.
In the process of recycling waste blended fabrics, we have also successfully separated single-component cotton fibers and terephthalic acid products by alkaline hydrolysis. , has a certain hindering effect on the separation of fibers of different components

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] An enzyme solution for treating waste polyester-cotton fabrics, the enzyme solution is a mixture of laccase, catalase and amylase in white rot fungi, the volume content of each component of the enzyme solution: laccase Accounted for 25 parts, catalase accounted for 25 parts, amylase accounted for 30 parts.

[0023] Soak the waste mop picked up from the garbage in a 5% NaOH solution in a 50-70°C water bath for 1.2-2.5 hours. The mass ratio of the waste mop to the NaOH solution is 1:4, and then ultrasonically clean it for 1 hour. After cleaning the dirt once, rinse it with clean water, drain the cleaned mop and dry it.

[0024] Cut the mop into 2cm cloth strips, add the above enzyme solution to the cloth strips for enzymolysis treatment, the mass ratio of the volume of the enzyme solution to the cloth strips is 0.2:1, the temperature is 35°C, the pH is 7, and the enzymolysis is 6h.

[0025] Weigh 20g of the enzymolyzed cloth into a large beaker, add 40g of NaOH with a ma...

Embodiment 2

[0029] An enzyme solution for treating waste polyester-cotton fabrics, the enzyme solution is a mixture of laccase, catalase and amylase in white rot fungi, the volume content of each component of the enzyme solution: laccase Accounted for 25 parts, catalase accounted for 25 parts, amylase accounted for 30 parts.

[0030] A process for treating waste polyester-cotton fabrics with an enzyme solution, including descaling, enzymatic hydrolysis, alkaline hydrolysis, suction filtration, cotton fiber recovery, and chemical fiber recovery, the specific steps are as follows:

[0031] (1) Descaling: add waste polyester-cotton fabrics to lye with a mass concentration of 2%, and dry them after ultrasonication for 0.5h in water at 5°C. The mass ratio of fabric to lye is 1:20, and the lye is KOH solution, cut the dried fabric into 10cm strips.

[0032] (2) Enzymolysis: Add the above-mentioned enzyme solution to the waste polyester-cotton fabric treated in step 1). 6h.

[0033] (3) Alkal...

Embodiment 3

[0037] An enzyme solution for treating waste polyester-cotton fabrics, the enzyme solution is a mixture of laccase, catalase and amylase in white rot fungi, the volume content of each component of the enzyme solution: laccase Accounted for 25 parts, catalase accounted for 25 parts, amylase accounted for 30 parts.

[0038] The process of using the above-mentioned enzyme solution to treat waste polyester-cotton fabrics includes descaling, enzymatic hydrolysis, alkaline hydrolysis, suction filtration, cotton fiber recovery, and chemical fiber recovery. The specific steps are as follows:

[0039](1) Descaling: add waste polyester-cotton fabrics to lye with a mass concentration of 6%, and then dry them in 30°C water with ultrasonic waves for 3 hours. The mass ratio of fabric to lye is 1:20, and the lye is NaOH solution ; Cut the dried fabric into 10cm strips.

[0040] (2) Enzymolysis: Add the above-mentioned enzyme solution to the waste polyester-cotton fabric treated in step 1), ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

The invention discloses an enzyme solution and technology for processing waste polyester / cotton fabric. The enzyme solution is a mixed solution of laccase in white-rot fungi, catalase and amylase, and according to the volume content of each component of the enzyme solution, the laccase accounts for 25 parts to 35 parts, the catalase accounts for 25 parts to 35 parts, and the amylase accounts for 30 parts to 50 parts. The technology for processing waste polyester / cotton fabric through the enzyme solution include the steps of descaling, enzymolysis, alkaline hydrolysis, suction filtration, cotton filer recycling and chemical fiber recycling. According to the enzyme solution and technology for processing waste polyester / cotton fabric, waste blended fabric is processed through an enzyme method, the enzyme solution and technology are suitable for recycling waste blended fabric nonuniform in color and have catalytic bleaching effect on a subsequent reaction, sizing agents and dye on clothes can become loose and fall off more easily, the enzyme solution and technology play an important role in separately recycling the polyester / cotton blended fabric, the condition is mild in the reaction process, a solvent is free of poison and harm, the reacting time is short, the efficiency is high, fibers of different components are effectively separated, and the recycled cotton fiber of the same kind and the recycled chemical fiber of the same kind have important significance.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to an enzyme solution and a process for treating waste polyester-cotton fabrics. Background technique [0002] The recycling and reuse of old textiles is an emerging industry with rich resources, low investment and significant benefits. It can not only alleviate the shortage of resources in the textile industry, but also reduce the environmental pollution caused by textiles, which has great economic and social benefits. Benefits benefit the country and the people. [0003] At present, more than 50% of my country's textile raw materials such as cotton, wool, and chemical fiber rely on imports, and resources are seriously insufficient. According to calculations by relevant parties, if the comprehensive utilization rate of waste textiles in my country reaches 60%, 18.8 million tons of crude oil and 16.34 million mu of arable land can be saved every year, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M16/00D06M101/32D06M101/06
Inventor 任宪君安良梅张秋艳
Owner 青岛福创环境科技有限公司