Preparation method of nano titanium rare-earth composite catalyst and application of catalyst in synthesis of polyesters and copolyesters.

A technology of rare earth compounding and catalyst, which is applied in the field of preparation of nano-titanium rare earth compound catalyst, which can solve the problems of low catalyst reaction efficiency, high by-products, yellow color, etc., and achieve the effect of stable reaction, low carboxyl terminal group and low THF

Active Publication Date: 2017-09-29
中科启程新材料科技(海南)有限公司
View PDF12 Cites 17 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation method prepares a highly efficient, stable and hydrolysis-resistant nano-titanium rare earth composite catalyst for polyester synthesis, which overcomes the yellowing

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of nano titanium rare-earth composite catalyst and application of catalyst in synthesis of polyesters and copolyesters.
  • Preparation method of nano titanium rare-earth composite catalyst and application of catalyst in synthesis of polyesters and copolyesters.
  • Preparation method of nano titanium rare-earth composite catalyst and application of catalyst in synthesis of polyesters and copolyesters.

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-6

[0035] Embodiment 1-6: the synthesis of nano titanium series rare earth composite catalyst

Embodiment 1

[0037] Add 50g of butanediol into the three-necked flask, add tetrabutyl titanate (0.1mol), nano-silicon dioxide (0.01mol), stir and mix evenly, and slowly mix the lactic acid solution (0.3mol) under stirring (50rpm / min) Add it dropwise to the mixture in the three-necked flask, and control the temperature at 50°C until the lactic acid drops completely. , heat up to 80°C until there is no distillate, add magnesium chloride (0.01mol) and dysprosium acetate (0.02mol), continue to stir and control the temperature to 90°C for 2-8 hours, remove small molecules, and obtain nano-titanium rare earth composite Catalyst A.

Embodiment 2

[0039] In the there-necked flask, add 50g absolute ethanol, add tetraethyl titanate (0.1mol), nano-alumina (0.02mol), stir and mix evenly, under stirring (50rpm / min) citric acid-ethanol solution ( 0.3mol) was slowly added dropwise to the mixture in the three-necked flask, and the temperature was controlled to 50° C. to react for 1 to 4 hours until the citric acid-ethanol solution was added dropwise. Then add sodium stearate (0.02mol) and neodymium stearate (0.02mol), heat up to 100°C and react for 2-8 hours, remove small molecules, and obtain nano-titanium series rare earth composite catalyst B.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a preparation method of a nano titanium rare-earth composite catalyst and application of the catalyst in synthesis of polyesters and copolyesters (especially degradable polyesters). The preparation method comprises the following steps: carrying out reaction on a nano support and a titanium compound in a solvent at 20-80 DEG C for 1-4 hours to obtain a titanium-dioxide-supported nanoparticle solution, wherein a hydrolytic agent is added in the reaction process; and adding chlorides, acetates or stearates of Nd, Dy, Sm, Ce, La or Y, and Na, Mg, Zn or Al, carrying out reaction at 50-150 DEG C for 2-8 hours, and removing the distillate, thereby obtaining the product. The novel nano titanium rare-earth composite catalyst is obtained in the nano support mode; and the preparation technique of the catalyst is optimized to obtain the nano rare-earth catalyst with stable catalytic performance and hydrolysis resistance. The polyesters prepared by using the catalyst have the advantages of favorable color phase, high molecular weight, narrow molecular weight distribution and stable performance, and can be widely used in industrial production of PBS, PBAT, PBSA, PBST, PBT and various other polyesters.

Description

technical field [0001] The present invention relates to the field of catalysts. More specifically, it relates to a preparation method of a nano titanium rare earth composite catalyst and its application in the synthesis of degradable polyester and copolyester. Background technique [0002] The technical route of polyester and copolyester is mainly esterification-polycondensation method. Firstly, carboxylic acid and excess alcohol are reacted with a catalyst to obtain an esterified product, and then vacuum polycondensation is performed to obtain high-molecular-weight polyester and copolyester under the action of a catalyst. In the whole synthesis process of polyester and copolyester, the catalyst plays the role of accelerating the reaction process, improving the reaction efficiency, and promoting the reaction to proceed in the direction of positive reaction. [0003] At present, the catalysts used in industrial polyester synthesis are mainly germanium-based, antimony-based ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C08G63/85C08G63/84C08G63/16C08G63/183
CPCC08G63/16C08G63/183C08G63/84C08G63/85
Inventor 季君晖卢波杨冰许颖
Owner 中科启程新材料科技(海南)有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap