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Method for preparing PBT raw material through chemical reduction of PET wastes

A waste and chemical technology, applied in the field of chemical reduction to prepare PBT raw materials, can solve problems such as inability to directly reprocess, waste of land resources, secondary pollution, landfill or incineration, etc.

Inactive Publication Date: 2019-08-23
PLASTIC UNION NEW MATERIAL TECH HUBEI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] As we all know, except for a very small amount of existing PET waste, which is used by people through physical regeneration methods, it can neither be reused nor directly reprocessed after recycling, and can only be used as landfill or incineration.
Not only waste land resources but also cause secondary pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] A method for preparing PBT raw material by chemical reduction of PET waste according to the present invention, first crushes the sorted PET waste into small pieces, and melts them with butanediol heated at 220°C.

Embodiment 2

[0011] On the basis of Example 1, the dregs in the dissolved liquid were filtered clean.

Embodiment 3

[0013] On the basis of Example 2, the solution obtained by filtering the dregs is more finely filtered with carbon powder, and the pigment etc. in the solution are filtered out.

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PUM

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Abstract

The invention relates to a method for preparing a PBT raw material through chemical reduction of PET wastes. The method comprises the steps of dissolving the PET wastes with butylene glycol through heating, then, carrying out filtering, then, carrying out decoloring, carrying out purifying to obtain BHBT, and adding a catalyst to synthesize PBT.

Description

technical field [0001] The invention discloses a method for preparing PBT raw material by chemical reduction of PET waste in our factory. [0002] technical background [0003] As we all know, the existing PET waste can neither be reused nor directly reprocessed after recycling except for a very small amount of it being used by people through physical regeneration. It can only be used as landfill or incinerated. Not only wasting land resources but also causing secondary pollution. Contents of the invention [0004] The purpose of the present invention is in order to overcome the defective of above-mentioned background technology, fundamentally completely eliminates this backward treatment mode, completely solves the second pollution. [0005] In order to achieve the above object, the technical solution of the present invention is as follows: [0006] In the invention, PET waste is heated and melted with butanediol, decolorized after filtration, purified into BHBT, and pol...

Claims

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Application Information

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IPC IPC(8): C08G63/183C07C67/03C07C69/82
CPCC07C67/03C08G63/183C07C69/82
Inventor 邓忠权邓军邓丽
Owner PLASTIC UNION NEW MATERIAL TECH HUBEI
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