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A kind of preparation method and application of titanium series composite catalyst for environment-friendly polyester

A composite catalyst and environment-friendly technology, applied in the field of polyester synthesis, can solve the problems of many side reactions and yellowish color of the product, and achieve the effects of stable quality, solving yellowish color and adjustable catalytic efficiency.

Active Publication Date: 2021-04-06
ZHEJIANG HENGYI PETROCHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems of many side reactions and yellowish product hue in the existing titanium-based catalyzed polyester production process, the present invention provides a preparation method and application of an environment-friendly titanium-based composite catalyst for polyester

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  • A kind of preparation method and application of titanium series composite catalyst for environment-friendly polyester

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preparation example Construction

[0026] Catalyst preparation:

[0027] Dissolve mesoporous nano-microspheres, titanium compounds and metal catalytic promoters in ethylene glycol, ultrasonically disperse, react in the solvent, and then remove small molecules in the reaction system to obtain an environmentally friendly titanium-based composite catalyst for polyester; The mass ratio of the mesoporous nano-microspheres to the titanium compound is 0.1 to 20:1; the molar ratio of the ethylene glycol to the titanium compound is 1 to 100:1; the molar ratio of the metal catalytic promoter to the titanium compound is 0.1~10:1.

[0028] Wherein, the mesoporous nanospheres are mesoporous carbon nanospheres, mesoporous silica nanospheres, mesoporous titanium dioxide nanospheres, mesoporous Al 2 o 3 Nanospheres, Mesoporous Fe 2 o 3 Nanospheres, Mesoporous Co-SiO 2 At least one of nanometer microspheres and mesoporous ZnO nanometer microspheres.

[0029] The titanium compound is at least one of titanium tetrachloride,...

Embodiment 1

[0036]Catalyst preparation: Dissolve cetyltrimethylammonium bromide and sodium dodecylbenzenesulfonate in 100ml of deionized water at a molar ratio of 4:1 to prepare a solution with a total concentration of 0.03mol / L, and ultrasonically After 0.5h, let stand for 24h. Then add 1ml of ammonia water, 25ml of ethanol, and 25ml of ether, stir vigorously for 0.5h, then add 3g of ethyl orthosilicate, and continue stirring for 4h to complete the reaction. The reaction solution was suction-filtered, the filter cake was repeatedly washed with ethanol and water for 5 times, then dried in an oven at 60°C for 12 hours, and then the product was roasted in a muffle furnace at 550°C for 3 hours, and then crushed to obtain a mesoporous Silicon oxide nanospheres. Then ethylene glycol, magnesium acetate, titanium tetrachloride are added in the there-necked flask successively, and the addition molar ratio is 20:4:1, then add mesoporous silica nano-microspheres, and the mass ratio with titanium t...

Embodiment 2

[0040] The preparation of catalyst: cetyltrimethylammonium bromide and sodium dodecylbenzenesulfonate are dissolved in the deionized water of 100ml according to the molar ratio of 4: 1, and the total concentration is prepared into a solution of 0.03mol / L, After ultrasonication for 0.5h, stand still for 24h. Then add 1ml of ammonia water and 25ml of diethyl ether, stir vigorously for 0.5h, then add 3g of ethyl orthosilicate, and continue stirring for 4h to complete the reaction. The reaction solution was suction-filtered, the filter cake was repeatedly washed with ethanol and water for 5 times, then dried in an oven at 60°C for 12 hours, and then the product was roasted in a muffle furnace at 550°C for 3 hours, and then crushed to obtain a mesoporous Silica microspheres. Then add ethylene glycol, magnesium acetate, and titanium tetrachloride into the three-necked flask in sequence, and the molar ratio of addition is 20:4:1, and then add mesoporous silica, and the mass ratio of...

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Abstract

The invention relates to the field of polyester synthesis, and discloses a preparation method and application of an environment-friendly titanium-based composite catalyst for polyester. The preparation method includes: dissolving mesoporous nano-microspheres, titanium compounds and metal catalytic promoters in ethylene glycol Among them, ultrasonic dispersion, reaction, and then removal of small molecules in the reaction system, to obtain an environmentally friendly titanium-based composite catalyst for polyester; the mass ratio of mesoporous nano-microspheres to titanium compounds is 0.1~20:1; ethylene glycol and titanium The molar ratio of the compound is 1-100:1; the molar ratio of the metal catalytic promoter to the titanium compound is 0.1-10:1. The invention regulates the catalytic activity of the titanium series composite catalyst by regulating the size of the mesoporous nanometer microsphere, the size of the aperture, and the ratio among the mesoporous microsphere, the titanium compound and the metal catalytic assistant. The application of the catalyst in polyester synthesis can effectively reduce the occurrence of side reactions, and at the same time solve the technical problem of yellowish color of titanium-based catalyzed polyester products.

Description

technical field [0001] The invention relates to the field of polyester synthesis, in particular to a preparation method and application of an environment-friendly titanium-based composite catalyst for polyester. Background technique [0002] Polyester is obtained from dibasic or polybasic acid and dibasic or polyhydric alcohol through esterification and polycondensation reaction. It usually refers to polyethylene terephthalate. It is widely used in various fields due to its good performance. . Because the catalyst plays an important role in the production process of polyester, many scholars at home and abroad have done a lot of research on the development of catalysts. At present, the research mainly focuses on the three series of germanium, antimony and titanium. [0003] Germanium-based catalysts have good stability in the production process of polyester, cause fewer side reactions, and obtain better quality polyester products. However, due to the lack of resources and hi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/85C08G63/183
CPCC08G63/183C08G63/85
Inventor 郭孝乐
Owner ZHEJIANG HENGYI PETROCHEM