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Method for preparing dibutyl terephthalate through waste polyester fabric depolymerization purification+butanol

A technology of dibutyl terephthalate and waste textiles, which is applied in the preparation of carboxylic acid esters, chemical instruments and methods, and the preparation of organic compounds, and can solve the waste of land resources, secondary pollution, landfill or incineration, and inability Issues such as direct reprocessing

Inactive Publication Date: 2019-11-08
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 waste textiles that are used by people using physical methods, they can neither be reused nor directly reprocessed after recycling, and can only be used as landfills or incinerated.
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 dibutyl terephthalate through chemical depolymerization and purification of polyester waste and old textiles according to the present invention into pure terephthalic acid monomer + butanol esterification is a solution for depolymerizing polyester waste and old textiles The dregs in the filter are cleaned.

Embodiment 2

[0011] On the basis of Example 1, the solution after depolymerization and filtration of polyester waste textiles was distilled and purified to become purified terephthalic acid monomer.

Embodiment 3

[0013] On the basis of Example 2, a certain proportion of butanol is added in purified terephthalic acid to carry out esterification reaction, and become dibutyl terephthalate.

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PUM

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Abstract

The invention discloses a method for preparing dibutyl terephthalate through waste polyester fabric depolymerization purification+butanol. A purified terephthalic acid monomer is prepared from a wastepolyester fabric through depolymerization and distillation purification, and butanol is added for esterification, and thus dibutyl terephthalate is prepared.

Description

technical field [0001] The invention discloses a method for preparing dibutyl terephthalate through depolymerization and purification of polyester waste textiles and butanol. [0002] technical background [0003] As we all know, except for a very small amount of existing waste textiles that are used by people using physical methods, they can neither be reused nor directly reprocessed after recycling, and can only be landfilled 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] The invention is to depolymerize and distill waste polyester waste textiles into pure terep...

Claims

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Application Information

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IPC IPC(8): C07C69/82C07C67/08C07C63/26C07C51/09C07C51/44
CPCC07C51/09C07C51/44C07C67/08C07C63/26C07C69/82
Inventor 邓忠权邓军邓丽
Owner PLASTIC UNION NEW MATERIAL TECH HUBEI
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