Unlock instant, AI-driven research and patent intelligence for your innovation.

Hydrolysis-resistant titanium catalyst for PBT, and preparation method and application thereof

A titanium catalyst and hydrolysis-resistant technology, which is applied in the field of polyester production, can solve the problems of easy deposition of hydrolyzate to block pipelines and lower catalytic efficiency, and achieve strong catalytic activity and broad application prospects

Active Publication Date: 2014-03-12
SINOPEC YIZHENG CHEM FIBER +1
View PDF9 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Due to the characteristics of titanate compounds, titanate catalysts are very easy to react with the water generated in the reaction system to form hydrolyzate, which reduces the catalytic efficiency. In addition, the hydrolyzate is easy to deposit and block the pipeline.

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

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0037] Add 29.7 grams of isopropyl titanate to 200 grams of absolute ethanol, fully stir to dissolve, add 18.8 grams of 50% (w / w) ethanol dropwise at room temperature under stirring, the titanate is hydrolyzed into a transparent gel, The dropwise addition is completed within 4 hours by controlling the rate of addition, continue to stir at room temperature for 1 hour, then raise the temperature to 60°C and stir for 2 hours, add about 490 grams of 1,4-butanediol and stir to dissolve, control the temperature to about 100°C, and reduce pressure (vacuum 10mmHg or so) to distill out low-boiling substances (water, isopropanol, ethanol, etc.), stop the distillation when there is no distillate, and cool to room temperature to obtain a transparent titanium catalyst solution with a titanium content of 1% (w / w).

preparation example 2

[0039]Add 35.6 grams of tetrabutyl titanate to 200 grams of absolute ethanol, fully stir to dissolve, add 18.8 grams of 50% (w / w) ethanol dropwise at room temperature under stirring, the titanate is hydrolyzed into a transparent gel, The dropwise addition is completed within 5 hours by controlling the rate of addition, continue to stir at room temperature for 1 hour, then raise the temperature to 60°C and stir for 2 hours, add about 490 grams of 1,4-butanediol and stir to dissolve, control the temperature to about 100°C, reduce pressure (vacuum 10mmHg or so) to distill out low-boiling substances (water, butanol, ethanol, etc.), stop the distillation when there is no distillate, and cool to room temperature to obtain a transparent titanium catalyst solution with a titanium content of 1% (w / w).

preparation example 3

[0041] Add 59.4 grams of isopropyl titanate to 200 grams of absolute ethanol, fully stir to dissolve, add 37.6 grams of ethanol containing 50% (w / w) water dropwise under stirring at room temperature, and the titanate will be hydrolyzed into a transparent gel. The dropwise addition is completed within 5 hours by controlling the rate of addition, continue to stir at room temperature for 1 hour, then raise the temperature to 60°C and stir for 2 hours, add about 485 grams of 1,4-butanediol and stir to dissolve, control the temperature to about 100°C, and reduce pressure (vacuum 10mmHg or so) to distill out low-boiling substances (water, isopropanol, ethanol, etc.), stop the distillation when there is no distillate, and cool to room temperature to obtain a transparent titanium catalyst solution with a titanium content of 2% (w / w).

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

PropertyMeasurementUnit
melting pointaaaaaaaaaa
melting pointaaaaaaaaaa
melting pointaaaaaaaaaa
Login to View More

Abstract

The invention discloses a hydrolysis-resistant titanium catalyst for PBT, and a preparation method and an application thereof. The preparation method of the hydrolysis-resistant titanium catalyst for PBT comprises the following steps: adding organic titanate into anhydrous ethanol to obtain an ethanol solution of the titanium compound with a concentration of 0.1-30wt%, slowly adding ethanol with the water content of 40-60wt%, heating to 40-80DEG C for carrying out a hydrolysis reaction to obtain a hydrolysis gel, adding 1,4-butylene glycol for dissolving the hydrolysis gel in 1,4-butylene glycol, and removing low-boiling-point compounds in the above reaction solution to obtain a transparent hydrolysis-resistant titanium catalyst solution. The PBT is synthesized by using terephthalic acid, butylene glycol and the hydrolysis-resistant titanium catalyst prepared through the preparation method via a direct esterification method, and has routine performances almost same to that of the PBT synthesized by adopting an organic titanate catalyst through traditional methods, and the hydrolysis-resistant titanium catalyst has a stronger catalysis activity than the organic titanate catalyst.

Description

technical field [0001] The invention belongs to the field of polyester production, and in particular relates to a PBT hydrolysis-resistant titanium catalyst and its preparation method and application. Background technique [0002] Polybutylene terephthalate (PBT for short) is a product with rapid development, rapid growth in production capacity, multiple specifications and a wide range of applications. Because PBT has heat resistance, weather resistance, chemical resistance, good electrical properties, low water absorption and good gloss, it is widely used in electronic appliances, auto parts, machinery, household products, etc. PBT products are also compatible with PE, PC, POM, PA, etc. are called the five general-purpose engineering plastics. At the same time, PBT also has important applications in the fields of fibers and films. [0003] Since the synthesis technology of PBT resin was developed on the basis of PET synthesis technology, in the initial stage of PBT resin ...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/183C08G63/85
Inventor 戴志彬夏峰伟魏高富
Owner SINOPEC YIZHENG CHEM FIBER