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Synthetic method of polyethylene glycol terephthalate from biomass glycol

A technology of polyethylene terephthalate and biomass ethylene glycol is applied in the field of polyester synthesis to achieve the effects of saving energy, reducing dependence and low cost

Inactive Publication Date: 2015-03-18
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The present invention is to solve the problem of synthesizing PET with biomass ethylene glycol and eliminate the influence of fusel alcohols in biomass ethylene glycol to achieve the performance index of petroleum-based polyester

Method used

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  • Synthetic method of polyethylene glycol terephthalate from biomass glycol

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Biomass ethylene glycol is used to react with terephthalic acid, and the molar ratio of these two raw materials is 1.3. The fusel alcohols in biomass ethylene glycol are ethanol, 1,2-propanediol, 1,2-butanediol, 1,2-pentanediol, 1,2-hexanediol, and the mass content of several alcohols is 0.01 %, 0.02%, 0.03%, 0.01%, 0.01%.

[0020] PET preparation steps:

[0021] (1) Put 90g of ethylene glycol and 180g of terephthalic acid into the reaction kettle, heat up to 120°C and stir for 20 minutes;

[0022] (2) Slowly add the composite catalyst lithium acetate and germanium oxide. The mass of the two is added in a ratio of 1:2. The amount added is 300ppm equivalent to the amount of terephthalic acid. The temperature of the slurry was raised to 250°C to start the esterification reaction. During the esterification reaction, maintain a fixed pressure (0.3-0.4MPa) until the first drop of water flows out, and then slowly release the pressure until the water output reaches more tha...

Embodiment 2 and 3

[0026] Polyester is synthesized with biomass ethylene glycol. The types of fusel alcohols in biomass ethylene glycol are the same as in Example 1, but the fusel alcohol content is different. The mass contents of 2 kinds of fusel alcohols in embodiment are respectively 0.01%, 0.1%, 0.05%, 0.03%, 0.01%, and the mass contents of the three kinds of fusel alcohols in the examples are 0.1%, 0.05%, 0.2%, 0.05%, and 0.1%, respectively.

[0027] The process of synthesizing polyester from terephthalic acid and biomass ethylene glycol is the same as in Example 1.

Embodiment 4

[0029] Polyester is synthesized with biomass ethylene glycol, and the type of fusel alcohol in biomass ethylene glycol is the same as in Example 1, and the content is also the same, but the catalyst used is a single-component catalyst germanium oxide, and the addition is equivalent to the amount of terephthalic acid 300ppm, other conditions in the synthetic process of polyester are the same with embodiment 1.

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Abstract

The invention discloses a synthetic method of polyethylene glycol terephthalate from biomass glycol. The glycol is prepared in to biomass through a chemical conversion method, and subjected to synthesis polyester reaction with terephthalic acid, wherein a catalyst is a composite catalyst. The biomass glycol and terephthalic acid in the molar ratio of 1.2:1-1.5:1 are added into a reaction kettle for esterification, wherein a stabilizer is triphenyl phosphate; and finally obtained by a condensation polymerization is carried out to obtain the polyester. glycol accounts for 95%-99.9% in the biomass glycol, and the trace alcohols are ethanol, 1, 2-propylene glycol, 1,2-butanediol, 1,2-pentadiol and 1,2-hexanediol. The technology of the invention is mainly to solve the influence of fusel on PET synthesis, and can synthesize PET polyester with quality standards satisfied from fusel-containing glycol.

Description

technical field [0001] The invention belongs to the technical field of polyester synthesis and relates to a method for synthesizing polyester from biomass ethylene glycol. Background technique [0002] Since the 20th century, the petrochemical industry has developed rapidly, and petroleum-based products have covered all aspects of our lives. According to statistics, 95% of the world's energy materials and chemicals are made of petrochemical resources. Currently, almost all plastic products widely used in various industries are derived from petrochemical products. The plastic industry has always been a high-margin industry, and the demand for plastic products continues to increase. Although it is certain that plastic is a very excellent material in terms of its low production cost and its wide range of properties, how to get rid of the dependence of these materials on fossil energy and seek renewable and green raw materials Substitution is undoubtedly an urgent problem to b...

Claims

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Application Information

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IPC IPC(8): C08G63/183C08G63/86C08G63/85C08G63/83C08G63/84C08K5/524C08K5/526
Inventor 张涛萧斌郑明远庞纪峰姜宇王爱琴
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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