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Catalyst for polyester preparation and its preparation method and application

A catalyst, polyester technology, applied in the preparation of this catalyst, polytrimethylene terephthalate, the field of polyester manufacturing, can solve problems such as no reported polyester

Active Publication Date: 2018-06-08
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In the above reports, there is no report on the preparation of a catalyst with high catalytic activity in the esterification and polycondensation stages of polyester, especially poly(trimethylene terephthalate).

Method used

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  • Catalyst for polyester preparation and its preparation method and application
  • Catalyst for polyester preparation and its preparation method and application
  • Catalyst for polyester preparation and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Mix 142g of tetraisopropyl titanate with 46g of ethanol and 90g of lactic acid, and react for 4 hours at a temperature of 100°C in a stirred reactor. Add 36g of magnesium acetate and 91g of triethyl phosphate to the reactant. In the reactor, the reaction was carried out for 4 hours under the temperature condition of 120°C. The reaction product is placed in a reactor equipped with a fractionation device, and ethanol and isopropanol are distilled off to make a catalyst. The catalyst is mixed with 1,3-propanediol, wherein the mass fraction of titanium atoms is 4%.

[0056] 600 grams of terephthalic acid, 440 grams of 1,3 propylene glycol and 1.49 g of catalyst were mixed to form a slurry, which was added to a polymerization kettle for esterification reaction. The esterification temperature was 230 °C and the pressure was 0.25 MPa. The device discharges the water generated by the reaction, reacts for 2 hours, and the esterification rate is 96%. After the esterification is...

Embodiment 2

[0059] Mix 142g of tetraisopropyl titanate with 46g of ethanol and 192g of citric acid, and react for 4 hours at 100°C in a stirred reactor, add 36g of magnesium acetate and 91g of triethyl phosphate to the reactant, and In a stirred reactor, the reaction was carried out at a temperature of 120° C. for 4 hours. The reaction product is placed in a reactor equipped with a fractionation device, and ethanol and isopropanol are distilled off to make a catalyst. The catalyst is mixed with 1,3-propanediol, wherein the mass fraction of titanium atoms is 4%.

[0060] 600 grams of terephthalic acid, 440 grams of 1,3 propylene glycol and 1.49 g of catalyst were mixed to form a slurry, which was added to a polymerization kettle for esterification reaction. The esterification temperature was 230 °C and the pressure was 0.25 MPa. The device discharges the water generated by the reaction, and reacts for 2 hours, and the esterification rate is 97%. After the esterification is completed, the...

Embodiment 3

[0063] Mix 142g of tetraisopropyl titanate with 46g of ethanol and 192g of citric acid, and react for 4 hours at a temperature of 100°C in a stirred reactor, and add 61g of zinc lactate and 91g of triethyl phosphate to the reactant. In a stirred reactor, the reaction was carried out at a temperature of 120° C. for 4 hours. The reaction product is placed in a reactor equipped with a fractionation device, and ethanol and isopropanol are distilled off to make a catalyst. The catalyst is mixed with 1,3-propanediol, wherein the mass fraction of titanium atoms is 4%.

[0064] 600 grams of terephthalic acid, 440 grams of 1,3 propylene glycol and 1.49 g of catalyst were mixed to form a slurry, which was added to a polymerization kettle for esterification reaction. The esterification temperature was 230 °C and the pressure was 0.25 MPa. The device discharges the water generated by the reaction, reacts for 2 hours, and the esterification rate is 96%. After the esterification is complete...

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Abstract

The invention relates to a catalyst for polyester preparation, its preparation method and application, and mainly solves the problem in the prior art that there is no catalyst with high catalytic activity in both the esterification and polycondensation stages of polytrimethylene terephthalate. The present invention adopts the reaction product comprising the following components: a) titanium compound, b) hydroxyl compound, c) metal organic salt, d) phosphorus compound; the preparation method of the catalyst is as follows: the titanium compound and the hydroxyl compound are mixed in React at 0-200°C for 0.1-24 hours to obtain an intermediate product; then add the metal organic salt and phosphorus compound to the product and react at 0-200°C for 0.1-24 hours to generate a catalyst for polyester preparation , better solve this problem, and can be used to prepare polytrimethylene terephthalate, polyethylene terephthalate and polybutylene terephthalate.

Description

technical field [0001] The present invention relates to a catalyst composition, which is particularly useful in the manufacture of polyesters, especially polytrimethylene terephthalate, and to a process for the preparation of such a catalyst. Background technique [0002] The promotion of catalyst is essential in the preparation of polyester. Several metals and metal-containing compositions can be used to catalyze the synthesis of polyesters. Antimony compounds are most commonly used in the manufacture of antimony-based catalysts, titanium compounds such as titanium alkoxides can also be used in the preparation of polyester. Polypropylene terephthalate is a new type of polyester material. Its fiber products have both the advantages of nylon and polyester. It is suitable for the manufacture of high-end clothing, wool-like fabrics, car carpets and other products. It is considered to be a new type of polyester that is expected to replace polyester. product. However, the intr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/85C08G63/83C08G63/183
Inventor 宋歌熊金根周文乐
Owner CHINA PETROLEUM & CHEM CORP
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