Method for recycling waste polyester/cotton blended fabric

A cotton blending and polyester technology, applied in the preparation of carboxylate/lactone, carbon preparation/purification, organic chemistry, etc., can solve the problems of narrow application range, environmental pollution, complex chemical treatment process, etc., and achieve recycling Completely processed, process-advanced effects

Active Publication Date: 2013-09-25
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] To sum up, the existing recycling methods have the disadvantages of low product added value, narrow application range, complex traditional chemical treatment process,

Method used

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  • Method for recycling waste polyester/cotton blended fabric
  • Method for recycling waste polyester/cotton blended fabric
  • Method for recycling waste polyester/cotton blended fabric

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Weigh 10g of waste polyester / cotton blended fabrics after cleaning and disinfection, cut into 1×1mm size waste polyester / cotton blended fabric fragments, add to a beaker filled with 500ml of deionized water, and disperse for 2 hours with a power of 90W and a frequency of 40kHz to obtain a dispersion , together into a high-pressure reactor with a volume of 1000ml, sealed, heated to 250°C at a heating rate of 5°C / min, and kept at an autogenous pressure of 3.2MPa for 240min to carry out the degradation reaction of cotton fibers and polyester fibers.

[0033] Continue to raise the temperature to 300 ° C, and keep it warm for 480 minutes under the autogenous pressure of 7.2 MPa to carry out the carbonization reaction of the cotton fiber degradation products.

[0034] Turn off the electric heater, and after the temperature in the reaction kettle is naturally cooled to room temperature, open the reaction kettle, take out the reaction product, and centrifuge the obtained product...

Embodiment 2

[0043] Weigh 12g of waste polyester / cotton blended fabric after cleaning, disinfection and washing, and cut it into 1.2×1.2mm, add it to a beaker filled with 600ml deionized water, and disperse it with ultrasonic waves with a power of 100W and a frequency of 40kHz for 2h to obtain a dispersion , and then put them together in a high-pressure reactor with a volume of 1000ml and seal it, raise the temperature to 100°C, continue to heat up to 240°C under stirring, and keep warm for 250min under the autogenous pressure of 3MPa to carry out the degradation reaction of cotton fiber and polyester fiber.

[0044] Continue to raise the temperature to 320°C, and keep it warm for 500min under the autogenous pressure of 8MPa to carry out the carbonization reaction of the cotton fiber degradation products.

[0045] Turn off the electric heater, and after the temperature in the reaction kettle is naturally cooled to room temperature, open the reaction kettle, take out the reaction product, an...

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Abstract

The invention provides a method for recycling a waste polyester/cotton blended fabric. The method comprises the following steps: performing a hydrothermal reaction on the waste polyester/cotton blended fabric fragment dispersing solution at the temperature of 240-260 DEG C to carry out a degradation reaction of cotton fibers and polyester fibers, continuously performing the hydrothermal reaction at the temperature of 300-320 DEG C to carry out a carbonization reaction of the cotton fiber degradation product, and separating and purifying to respectively obtain a carbon material, terephthalic acid and ethylene glycol so as to recycle the waste polyester/cotton blended fabric. The method for recycling the waste polyester/cotton blended fabric is advanced and simple in process flow, an acid-base catalyst is not used in the process, secondary pollution of the environment is avoided, and the waste polyester/cotton blended fabric is completely and totally recycled.

Description

technical field [0001] The invention relates to a method for recycling waste textiles, in particular to a method for recycling waste polyester / cotton blended fabrics. Background technique [0002] According to statistics, the world's annual waste of textiles reaches 30 million tons, of which waste polyester / cotton blended fabrics account for more than 50%. They are rarely recycled as useful resources, but instead are directly buried or incinerated. Since synthetic fibers such as polyester, nylon, polypropylene and acrylic fibers are not easy to degrade, they are extremely harmful to the soil environment after being buried; on the other hand, textiles containing synthetic fibers will produce a large amount of toxic gases during combustion, causing air pollution. Therefore, in order to save resources and protect the environment, recycling waste textiles has attracted widespread attention from the whole society. [0003] As one of the development projects of the national circ...

Claims

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Application Information

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IPC IPC(8): C07C63/26C07C51/09C07C31/20C07C29/09C01B31/02C01B32/05
Inventor 侯文生张永芳戴晋明陈旭红史晟牛振怀朱秋荣
Owner TAIYUAN UNIV OF TECH
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