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Liquid-phase titanium composite catalyst and preparation method and application of liquid-phase titanium composite catalyst in preparation of polyester compound

A technology of composite catalyst and titanium compound, which is applied in the field of preparation, liquid-phase titanium-based composite catalyst, and polyester compound preparation, can solve the problems of low catalytic efficiency and achieve the effects of fast catalytic rate, good product hue and high activity

Active Publication Date: 2020-06-05
JINLIN MEDICAL COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The addition of ruthenium compound in the invention can effectively improve the catalytic activity of the composite catalyst, solve the problem of low catalytic efficiency in the polyester polymerization process, and at the same time, the catalyst can improve the hue of the product

Method used

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  • Liquid-phase titanium composite catalyst and preparation method and application of liquid-phase titanium composite catalyst in preparation of polyester compound

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A liquid-phase titanium-based composite catalyst, calculated as 100% by mass, consists of 2-10% titanium compound, 0.5-2% ruthenium compound, 5-25% polyether polyol compound, 2.5-13% ethylene glycol And 50-90% ethanol mixed.

[0020] A preparation method of a liquid-phase titanium series composite catalyst, the specific steps are as follows:

[0021] Add tetraethyl titanate (5g), terpyridine ruthenium (0.9g), ethylene glycol (10g), polyether polyol (20g) and dehydrated alcohol (64.1g) in the stirrer successively, fully stir 1- 2h, the obtained clear solution is liquid titanium composite catalyst A.

[0022] The application of a liquid phase titanium series composite catalyst in the preparation of polyester compounds is specifically as follows:

[0023] In a 1L polyester reactor, add terephthalic acid (220g), ethylene glycol (120g) and catalyst A (4.4g, the quality of tetraethyl titanate is one thousandth of the quality of terephthalic acid) , then add 1g of stabilize...

Embodiment 2

[0025] A preparation method of a liquid-phase titanium series composite catalyst, the specific steps are as follows:

[0026] Tetraethyl titanate (5 g), ruthenium terpyridine (1.5 g), ethylene glycol (10 g), polyether polyol (25 g) and absolute ethanol (58.5 g) were sequentially added into a stirrer. Thoroughly stir for 1-2h to obtain a clear solution which is liquid titanium-based composite catalyst B.

[0027] The preparation method of the polyester is the same as in Example 1, and the amount of catalyst B used is 4.4 g (the weight of tetraethyl titanate is one thousandth of the mass of terephthalic acid).

Embodiment 3

[0029] A preparation method of a liquid-phase titanium series composite catalyst, the specific steps are as follows:

[0030] Tetraethyl titanate (10 g), ruthenium terpyridyl (0.5 g), ethylene glycol (10 g), polyether polyol (25 g) and absolute ethanol (54.5 g) were successively added into the stirrer. Thoroughly stir for 1-2h to obtain a clear solution which is liquid titanium-based composite catalyst C.

[0031] The preparation method of the polyester is the same as in Example 1, and the amount of catalyst C used is 11 g (the weight of tetraethyl titanate is 5 / 1000 of the mass of terephthalic acid).

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Abstract

The invention discloses a liquid-phase titanium composite catalyst and a preparation method and application of the liquid-phase titanium composite catalyst in preparation of polyester compounds. The invention belongs to the technical field of preparation of titanium catalysts. The catalyst is prepared by mixing the following components in percentage by mass: 2-10% of a titanium compound, 0.5-2% ofa ruthenium compound, 5-25% of a polyether polyol compound, 2.5-13% of ethylene glycol and 50-90% of ethanol. In the polyester polymerization process, the addition amount of the catalyst is one thousandth to five thousandths of the mass of the carboxylic acid monomer based on the titanium compound. The liquid-phase composite catalyst prepared by the invention is a compound mainly formed by mixinga titanium compound, a ruthenium compound, a polyether polyol compound, ethylene glycol and ethanol, and has the advantages of high catalytic rate, high activity, low residual carboxyl-terminated content, good product hue and the like compared with the existing polyester catalyst.

Description

technical field [0001] The invention belongs to the technical field of preparation of titanium-based catalysts, and in particular relates to a liquid-phase titanium-based composite catalyst, a preparation method and its application in the preparation of polyester compounds. Background technique [0002] Polyester is not only one of the most important synthetic fiber raw materials, but also has very important uses in engineering plastics and other industrial fields. my country began to study polyester production technology in 1958, and has strong development capabilities and a solid foundation so far. Since the 1990s, the competition in the polyester market has become increasingly fierce, prompting various manufacturers to seek ways to reduce costs and enhance competitiveness. It has become the development trend of polyester production technology to simplify the process flow, expand the production scale and increase the production capacity of single line. The output of poly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/85C08G63/87C08G63/82C08G63/183
CPCC08G63/85C08G63/87C08G63/826C08G63/183
Inventor 李文亮刘甲雪肖箫崔桂花
Owner JINLIN MEDICAL COLLEGE
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