Method for separating ABS (Acrylonitrile Butadiene Styrene) and PS (Poly Styrene) from waste mixed plastic and application of method

A mixed plastic and waste technology, applied in the field of waste plastic, can solve the problems of slow plastic dissolution, difficult separation of ABS and PS, unfriendly environment, etc., to achieve the effect of short production cycle and low energy consumption

Active Publication Date: 2014-04-09
HUNAN VARY TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to provide a method for separating ABS and PS from waste mixed plastics and its application to solve the problem of difficult separation of ABS and PS in waste mixed plastics in the prior art, the solvent used for the separation of plastic mixtures is not friendly to the environment, and the plastic dissolves slowly. and other technical issues

Method used

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  • Method for separating ABS (Acrylonitrile Butadiene Styrene) and PS (Poly Styrene) from waste mixed plastic and application of method
  • Method for separating ABS (Acrylonitrile Butadiene Styrene) and PS (Poly Styrene) from waste mixed plastic and application of method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] See the process flow figure 1 .

[0041] Add a solvent consisting of 95% by mass of industrial acetone and 5% by mass of n-hexane from the feeding port of a 300-liter three-port dissolution reactor, start stirring and mix the acetone and n-hexane evenly.

[0042] Heat the reaction kettle, and turn on the condensing circulating water of the solvent reflux system. When the temperature of the solvent rises to 40°C, add refrigerator waste mixed plastic with a particle size of less than 10mm into the reactor according to the weight ratio of solvent and refrigerator waste mixed plastic at 1:0.5, and stir and dissolve until the solid material no longer shrinks.

[0043] Put the plastic solution directly from the bottom of the reactor on a filter with a mesh size of 2 mm, and collect and filter the ABS solution. After the filtration is completed, the filtrate on the net is transferred to another three-port reaction kettle with a capacity of 240 liters as soon as possible.

...

Embodiment 2

[0050] See the process flow figure 1 .

[0051] Add a solvent consisting of 85% by mass of industrial acetone and 15% by mass of n-hexane from the feeding port of a 300-liter three-port dissolution reactor, start stirring and mix the acetone and n-hexane evenly.

[0052] Heat the reaction kettle, and turn on the condensing circulating water of the solvent reflux system. When the temperature of the solvent rises to 35°C, add refrigerator waste mixed plastic with a particle size of less than 10mm into the reactor according to the weight ratio of solvent and refrigerator waste mixed plastic at 1:0.3, and stir and dissolve until the solid material no longer shrinks.

[0053] Put the supernatant on a filter with a mesh size of 2 mm, and collect and filter the ABS solution. After the filtration is completed, the filtrate on the net is transferred to another three-port reaction kettle with a capacity of 240 liters as soon as possible.

[0054] After filtering the obtained ABS solu...

Embodiment 3

[0060] See the process flow figure 2 .

[0061] Add a solvent consisting of 90% by mass of industrial acetone and 10% by mass of n-hexane from the feeding port of a 300-liter three-port dissolution reactor, start stirring and mix the acetone and n-hexane evenly.

[0062] The waste and old mixed plastics of the refrigerator are crushed to a particle size of less than 10mm, and the obtained particles are processed by conventional air separation, and the air containing foam enters the foam treatment process. The particles that have been treated by winnowing are washed with water, filtered, dried and sedimented to remove sand. Get pre-processed refrigerator waste mixed plastic.

[0063] Heat the reaction kettle, and turn on the condensing circulating water of the solvent reflux system. When the temperature of the solvent rises to 38°C, add refrigerator waste mixed plastic with a particle size of 7mm to the reactor according to the weight ratio of solvent and refrigerator waste...

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Abstract

The invention provides a method for separating ABS (Acrylonitrile Butadiene Styrene) and PS (Poly Styrene) from waste mixed plastic and application of the method. The method comprises the following steps of dissolving the waste mixed plastic into a solvent to obtain a plastic solution; and filtering the plastic solution to obtain filtrate and filtered articles, wherein the solvent consists of 85 to 95% by mass of acetone and 5 to 15% by mass of n-hexane. According to the method, the ABS / PS is separated from PP (Polypropylene), PE (Polyethylene Tube), PVC (Polyvinyl Chloride) and the like in the waste mixed plastic, and then the ABS and PS are further separated and purified; the ABS purity reaches more than 99%; the waste plastic can only be dissolved for 30 to 40 minutes under a temperature of 30 to 40 DEG C with the solvent above; the method is short in production cycle, low in energy consumption, and applicable to industrial application.

Description

technical field [0001] The invention relates to the technical field of waste plastics, in particular to a method for separating ABS and PS from waste mixed plastics and its application. Background technique [0002] The polymer materials used in refrigerators are mainly acrylonitrile, copolymer of butadiene and styrene (ABS), polystyrene (PS), polypropylene (PP), polyethylene (PE), polyamide (PA) , polyoxymethylene (POM), polyvinyl chloride (PVC), polybutylene terephthalate (PBT) and polyurethane foam (PUR), PS includes HIPS (high impact polystyrene) and GPPS (general purpose polystyrene) vinyl), etc. Except for PUR, which is a thermosetting resin, the above materials are all thermoplastics, which are used to form the liner, top cover, handle, food storage box, shelf, etc. of the refrigerator. Among the plastic materials of a single refrigerator, more than 90% are ABS and PS. ABS and PS are mainly used to make refrigerator liners. The refrigerator liners in Japan and the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J11/08
CPCY02W30/62
Inventor 明果英张长安周军
Owner HUNAN VARY TECH
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