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Method for producing polyester

A production method and technology of polyester, applied in the field of polyester production, can solve the problems of high production cost, high energy consumption, large water ratio, etc., and achieve good color tone and heat resistance

Inactive Publication Date: 2009-09-09
TORAY FIBER RES INST(CHINA) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the industrial production method of ethylene glycol is mainly the direct hydration method of ethylene oxide. Although the process is mature, it has a large water ratio, high energy consumption and high production cost.

Method used

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  • Method for producing polyester
  • Method for producing polyester
  • Method for producing polyester

Examples

Experimental program
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Effect test

Embodiment 1

[0030] With the device of the comparative example, ethylene glycol is replaced by biological source ethylene glycol, and the addition amount of other raw materials and catalysts remains unchanged, and the esterification and polycondensation reactions are completed in the same temperature range to obtain the poly(p-phenylene) of the present invention. Ethylene glycol diformate products. The amount added relative to the polyester weight is:

[0031] The addition amount of titanium element in titanium compound is 5ppm

[0032] The amount of phosphorus added in the phosphorus compound is 13ppm

[0033] The addition amount of magnesium element in the magnesium compound is 40ppm.

[0034] Phosphorous compounds are phosphites and have the following structure,

[0035]

[0036] where R 1 , R 2 , R 3 , R 4 is an alkyl, cycloalkyl, arylalkyl or alkylaryl group with 4 to 25 carbons. Example R 1 , R 2 , R 3 , R 4 Can be 3-methyl-5-ethyloctane, 2,5-dimethyl-3,4-diethylhexane...

Embodiment 2

[0039] In the device of the comparative example, the ethylene glycol is replaced by bio-sourced ethylene glycol, the phosphorus compound is replaced by phosphoric acid, and the addition amount of other raw materials and catalysts remains unchanged. The esterification and polycondensation reactions are completed in the same temperature range, and the present Invention of polyethylene terephthalate articles. The amount added relative to the polyester weight is:

[0040] The addition amount of titanium element in titanium compound is 5ppm

[0041] The amount of phosphorus added in the phosphorus compound is 13ppm

[0042] The addition amount of magnesium element in the magnesium compound is 40ppm.

[0043] All the other are with embodiment 1.

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Abstract

The invention discloses a method for producing a polyester, which is prepared by esterification reaction or ester exchange reaction and polycondensation reaction of dibasic acid and dibasic alcohol, wherein the carbon element in the ethylene glycol which is a raw material is sourced from biological materials; and catalysts added in the polycondensation reaction comprise titanium compounds, magnesium compounds and phosphorous compounds which are phosphite ester. The carbon element component in the dibasic alcohol component of the product is sourced from the biological materials, but not from petroleum materials, thereby greatly reducing the emission of CO2 generated by petroleum refining.

Description

Technical field: [0001] The invention relates to a production method of polyethylene terephthalate (PET). Background technique: [0002] Since the reform and development, China's economic development has entered the fast lane, but with the rapid economic development, the human living environment has been deteriorating day by day. People are paying more and more attention to the development and use of environmentally friendly materials and the use of renewable materials. Raw materials, biodegradable materials, etc. Petroleum resources, as non-renewable resources, are the most important chemical raw materials, but due to the large amount of CO in use engineering and final waste 2 emissions, CO 2 A large amount of emissions has led to a series of problems such as global warming and the greenhouse effect, and directly threatens the survival of human beings. How to replace and reduce the use of petroleum as a raw material has become one of the important research issues people ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/82C08G63/183
Inventor 邹美华盛思义李旭本田圭介
Owner TORAY FIBER RES INST(CHINA) CO LTD
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