Efficient polyester composite catalyst and preparation method and application thereof

A composite catalyst and polyester technology, applied in the field of polyester catalysts, can solve the problems of easy hydrolysis, low selectivity, and poor product hue.

Pending Publication Date: 2018-05-15
中科启程新材料科技(海南)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Although with the continuous advancement of technology, the polyester catalyst system has been continuously optimized and improved, especially the liquid titanium composite catalyst system, which largely overcomes the problems of difficulty in catalyst addition, easy hydrolysis, and low selectivity.
However, in actual production, during the synthesis process of polyester, especially biodegradable polyester represented by PBS and PBAT, the product still has problems such as poor hue, high acid value, low catalytic efficiency, and the need to add a large amount of problems

Method used

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  • Efficient polyester composite catalyst and preparation method and application thereof
  • Efficient polyester composite catalyst and preparation method and application thereof
  • Efficient polyester composite catalyst and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0083] A kind of efficient polyester composite catalyst, its preparation comprises the steps:

[0084] Add 160g of absolute ethanol to 75g of tetraisopropyl titanate and 12g of ethyl orthosilicate and stir at room temperature for 1 hour to obtain product X. Dissolve 32g of citric acid in 200ml of ethanol to obtain a mixture Y, and then slowly drop the mixture Y into In the product X, react at room temperature for 2h. Raise the temperature to 100°C, add 12g triethyl phosphite and 8g calcium acetate trihydrate in turn, react for 2 hours and then raise the temperature to 150°C to distill out small molecules, and then add 10ml butanediol to dilute after the distillation speed slows down significantly ; Cooling discharge obtains polyester composite catalyst, weighs, calculates Ti content, and dynamic light scattering measures particle size, and the results are shown in Table 1.

[0085] The application of described high-efficiency polyester composite catalyst in catalytic polyeste...

Embodiment 2

[0088] A kind of efficient polyester composite catalyst, its preparation comprises the steps:

[0089] Add 160g of absolute ethanol to 75g of tetraisopropyl titanate and 30g of tetraisopropyl titanate and 30g of ethyl orthosilicate and stir for 0.2h at 40°C to obtain product X; at the same time, dissolve 65g of citric acid in 50ml of ethanol to obtain a mixed solution Y, and then mix the mixed solution Y Slowly drop into the product X, react at room temperature for 2h. Raise the temperature to 120°C, add 48g of triethyl phosphate, react for half an hour, then add 16g of sodium acetate trihydrate, react for 2 hours, then raise the temperature to 150°C to distill out small molecules, and add 10ml after the distillation speed slows down significantly Diluted with 1,3-propanediol; cooled and discharged to obtain a high-efficiency polyester composite catalyst, weighed, calculated the Ti content, and measured the particle size by dynamic light scattering. The results are shown in Ta...

Embodiment 3

[0093] A kind of efficient polyester composite catalyst, its preparation comprises the steps:

[0094] Add 362.58g of butanediol to 75.26g of tetrabutyl titanate and 285.8g of ethyl orthosilicate and stir at 78°C for 0.1h to obtain product X. Dissolve 130g of citric acid in 300ml of ethanol to obtain a mixture Y, and then mix the mixture Y Slowly drop into the product X, react at room temperature for 6h. Raise the temperature to 100°C, add 200.5g of phosphinate and 8.69g of cobalt acetate in turn, react for 4 hours and then raise the temperature to 150°C to distill out small molecules, and then add 10ml of butanediol to dilute after the distillation speed slows down significantly; Cool and discharge to obtain a high-efficiency polyester composite catalyst, weigh it, calculate the Ti content, and measure the particle size by dynamic light scattering. The results are shown in Table 1.

[0095] The application of described high-efficiency polyester composite catalyst in catalyti...

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Abstract

The invention discloses an efficient polyester composite catalyst and a preparation method and application thereof. The efficient polyester composite catalyst is transparent colloid, a dispersoid of the transparent colloid is a complex formed by Ti, Si, P, O, C, H and metal M or a gathered product of the complex; and the metal M is one or more of IA group metals, IIA group metals, VIII group metals and IIB group metals. The preparation method of the efficient polyester composite catalyst comprises the following steps: carrying out mixing reaction on a titanium source, a silicon source and alcohol A to obtain a product X; mixing organic acid with alcohol B to obtain a mixed solution Y; carrying out mixing reaction on the product X and the mixed solution Y to obtain a product Z; and carryingout mixing reaction on the product Z, a phosphorus source and metal salt to obtain the efficient polyester composite catalyst. The efficient polyester composite catalyst is applied to catalyzed polyester synthesis. The polyester composite catalyst does not coagulate or flocculate when meeting water, and has high efficiency and high selectivity.

Description

technical field [0001] The invention relates to the technical field of polyester catalysts. More specifically, it relates to a high-efficiency polyester composite catalyst and its preparation method and application. Background technique [0002] The catalysts used in industrial polyester synthesis are mainly germanium, antimony and titanium catalysts. Among them, germanium-based catalysts have high catalytic activity and few side reactions, but are expensive; while antimony-based catalysts have few side reactions and are cheap, but have low activity and heavy metal pollution; titanium-based catalysts are highly active, cheap, and non-polluting. , is currently the most commonly used type of catalyst in the esterification-polycondensation process. [0003] The titanium-based catalysts used in the early days were organic esters of various titanium, including inorganic salts of titanium, such as potassium fluorotitanate, potassium titanium oxalate, and organic esters of titani...

Claims

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Application Information

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IPC IPC(8): C08G63/85C08G63/83C08G63/84
CPCC08G63/826C08G63/83C08G63/84C08G63/85
Inventor 王格侠季君晖卢波
Owner 中科启程新材料科技(海南)有限公司
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