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Method for extracting polyethylene from polyethylene white garbage

A technology of white garbage and extraction method, applied in recycling technology, plastic recycling, etc., can solve the problems of polluted air, not easy to degrade, and secondary pollution.

Inactive Publication Date: 2014-01-22
SHENZHEN BAIYILAI IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are two traditional ways to deal with these waste plastic packaging, one is landfill, but it is not easy to degrade and will cause harm to the soil; the other is incineration, but incineration will produce harmful gases into the air, thus polluting the air
These two methods will cause different degrees of secondary pollution. Therefore, it is very important for human development to find a method that can recycle this plastic packaging and avoid secondary pollution.

Method used

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  • Method for extracting polyethylene from polyethylene white garbage

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041]Recycle and classify the white garbage, find out the polyethylene white garbage by visual inspection, and then send it to the crusher with water for crushing, and chop it into an area of ​​0.01m 2 The shredded pieces with water are sent to the cleaning tank through the conveyor belt for cleaning, and are washed by rolling again, and then the cleaned polyethylene white garbage pieces are dried with a spin dryer and then dried in the sun.

[0042] Take 1000g of polyethylene white garbage fragments and place them in the reactor, add a mixed solution of xylene and chloroform, wherein the volume ratio of xylene to chloroform is 4:1, a total of 5000g; adjust the temperature of the reactor to 150 ° C, and Stir at 90 rpm for 40 minutes until dissolved to obtain an organic solution containing polyethylene. Then add polyethylene powder equivalent to the polyethylene-containing organic solution from the feeding port, and stir at 100 rpm for 30 minutes, cool to 10°C to obtain a mixt...

Embodiment 2

[0044] Recycle and classify the white garbage, find out the polyethylene white garbage by visual inspection, and then send it to the crusher with water for crushing, and chop it into an area of ​​0.04m 2 The shredded pieces with water are sent to the cleaning tank through the conveyor belt for cleaning, and are washed by rolling again, and then the cleaned polyethylene white garbage pieces are dried with a spin dryer and then dried in the sun.

[0045] Take 1000g of polyethylene white garbage fragments and place them in the reactor, add a mixed solution of toluene and chloroform, wherein the volume ratio of toluene to chloroform is 1:1, totaling 5000g; adjust the temperature of the reactor to 140°C, and / min and stirred for 45 minutes until dissolved to obtain a polyethylene-containing organic solution. Then add polyethylene powder equivalent to the polyethylene-containing organic solution from the feeding port, and stir at 100 rpm for 40 minutes, cool to 35°C to obtain a mixt...

Embodiment 3

[0047] Recycle and classify the white garbage, find out the polyethylene white garbage by visual inspection, and then send it to the crusher with water for crushing, and chop it into an area of ​​0.02m 2 The shredded pieces with water are sent to the cleaning tank through the conveyor belt for cleaning, and are washed by rolling again, and then the cleaned polyethylene white garbage pieces are dried with a spin dryer and then dried in the sun.

[0048] Get the fragments of 1000g polyethylene white garbage and place in the reactor, add the mixed solution of toluene, chloroform and tetrahydronaphthalene, wherein, the volume ratio of toluene, chloroform and tetrahydronaphthalene is 4:2:1, total 5000g; The temperature of the kettle was adjusted to 160° C., and stirred at 85 rpm for 45 minutes until dissolved to obtain an organic solution containing polyethylene. Then add polyethylene powder equivalent to the polyethylene-containing organic solution from the feeding port, and stir ...

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Abstract

The invention discloses a method for extracting polyethylene from polyethylene white garbage. The method comprises the following steps: crushing the polyethylene white garbage into fragments; adding an organic solvent to the fragments to stir and dissolve, so as to obtain an organic solution containing polyethylene; adding polyethylene powder which is equal to the organic solution containing the polyethylene in mass; continuing to stir, and then cooling to obtain mixture gel, wherein the organic solvent is a mixed solution formed by two or more of methylbenzene, dimethylbenzene, chloroform, tetrahydronaphthalene and decahydronaphthalene in a mixing manner; crushing the mixture gel, and then removing the organic solvent in a distillation manner; adding water to filter and separate, so as to obtain the polyethylene. By adopting the method for extracting the polyethylene from polyethylene white garbage, secondary pollution on the environment caused by recovery treatment can be effectively avoided.

Description

technical field [0001] The invention relates to a method for extracting polyethylene from polyethylene white garbage. Background technique [0002] With the acceleration of people's life rhythm, social life is developing towards convenience and sanitation. In order to meet this demand, disposable foam plastic lunch boxes, plastic bags, chopsticks, water cups, etc. began to frequently enter people's daily life. The emergence of these easy-to-use and low-cost packaging materials has brought a lot of convenience to people's lives. These packaging materials become "white garbage" after being used and discarded, which brings harm to the environment and becomes a great environmental problem. [0003] For example, some waste plastic packaging materials, such as compost bags, garbage bags, light plastic packaging bags used in supermarkets and mulch films, are mainly composed of polyethylene, which is a thermoplastic resin obtained by addition polymerization of ethylene. According ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J11/08C08L23/06
CPCY02W30/62
Inventor 王扬生
Owner SHENZHEN BAIYILAI IND