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A kind of heterogeneous catalyst and its application in the preparation of polyester

A kind of heterogeneous catalyst, catalyst technology, applied in the field of polyester preparation

Active Publication Date: 2020-08-21
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

However, with the development of society, ordinary polyester can no longer meet the growing needs of people's lives and industrial fields.

Method used

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  • A kind of heterogeneous catalyst and its application in the preparation of polyester
  • A kind of heterogeneous catalyst and its application in the preparation of polyester

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Catalyst A Preparation

[0032] The preparation of described catalyst A can operate according to the following steps:

[0033] First, add 100mL of methanol, 10mL of ammonia water with a mass fraction of 28% and 30mL of deionized water into a 250mL three-necked flask, stir mechanically for 30 minutes, and then add 4.2g of ethyl orthosilicate dropwise into it, and stir at 60°C for 3 hours , after centrifuging and washing with water and drying, the catalyst SiO 2 Silicon spheres.

[0034] Take 2g of prepared SiO 2 Suspend the silicon spheres in 20 mL of absolute ethanol, add 2 mL of polyethylene glycol 200 as a dispersant, and add 0.32 g of BiCl under stirring conditions 3 with 0.095gTiCl 4 (BiCl 3 with TiCl 4 The molar ratio is about 2:1) and mix evenly, slowly add ammonia water with a mass fraction of 28% under stirring to adjust the pH to 5, age at room temperature for 6 hours, filter and dry, and calcinate at 500°C for 4 hours.

[0035] Suspend 2 g of calcined s...

Embodiment 2

[0037] Catalyst B preparation

[0038] The preparation method of catalyst B is the same as that of catalyst A in Example 1, except that the BiCl used 3 with TiCl 4 The molar ratio is about 1:1.

Embodiment 3

[0040]Catalyst C preparation

[0041] The preparation method of catalyst C is the same as that of catalyst A in Example 1, except that the BiCl used 3 with TiCl 4 The molar ratio is about 1:2.

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PUM

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Abstract

The invention relates to preparation of a hydrophobically-modified transition metal oxide-immobilized organosilicone sphere catalyst and application of the catalyst to preparation of polyester. According to the invention, dibasic acid and dihydric alcohol are used as monomers and a hydrophobically-modified transition metal oxide-immobilized organosilicone sphere is used as a catalyst, so polyesteris prepared under mild conditions. The catalyst used in the preparation can effectively reduce esterification time, lower polycondensation temperature, decrease the loss of raw materials and reduce the probability of occurrence of side reactions of a system.

Description

technical field [0001] The invention relates to a method for preparing polyester which uses hydrophobically modified transition metal oxide immobilized organosilicon balls as a catalyst, and dibasic acid and dibasic alcohol as monomers. Background technique [0002] Thermoplastic polyesters are linear polymers prepared by polycondensation of saturated dibasic acids and diols. Various thermoplastic polyesters can be synthesized according to dibasic acids and diols. At present, the varieties that have been industrially produced and applied mainly include: polybutylene terephthalate (PBT), polyethylene terephthalate (PET), polycyclohexylenedimethylene terephthalate (PCT) , polyethylene naphthalate (PEN), polybutylene naphthalate (PBN) and polytrimethylene terephthalate (PTT), etc. Among these varieties, the most widely used are PET and PBT. Especially PET. Foreign countries began research on PET as early as the 1930s and 1940s. [0003] Catalysts play a vital role in the p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/85C08G63/87C08G63/82C08G63/42
CPCC08G63/42C08G63/82C08G63/85C08G63/87
Inventor 孙颖徐杰高进郑玺杜文强石松
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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