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Integrated copolyether glycol manufacturing process

一种共聚醚二醇、共聚的技术，应用在结合的共聚醚二醇制备领域，能够解决保持反应器温度困难、粘度增加、保持催化剂等问题

Inactive Publication Date: 2014-08-06
INVISTA TECHNOLOG IES S A R L
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is recognized that high alkylene oxide content in the copolymer leads to high conversion and causes an increase in viscosity in the crude product mixture, which in turn makes catalyst retention a great challenge when using heterogeneous catalysts
Because of the significantly more exothermic nature of the copolymerization reaction in e.g. continuous stirred tank reactor (CSTR) processes, maintaining the reactor temperature becomes difficult in industrial scale plants

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0120] A feed composition consisting of 13.9 wt% EO, 1.8 wt% butanediol as MWCA and the balance THF was premixed in a stainless steel vessel. The feed was fed through the above reactor under the following conditions: residence time in the reactor was 2.25 hours; reactor temperature was 61.9°C and stirrer speed was set at 500 rpm. The conversion of the feed was 50.0% by weight and the OCE fraction was 11.5% by weight of the 50% by weight crude polymer. The molecular weight of the final product was 2613 g / mol, the polydispersity was 2.40, the EO incorporation was 38.2 mol% and the color was 14 APHA.

Embodiment 2

[0122] A feed composition consisting of 19.2 wt% EO, 1.29 wt% deionized water as MWCA and the balance THF was premixed in a stainless steel vessel. The feed was fed through the above reactor under the following conditions: the residence time in the reactor was 2.50 hours; the reactor temperature was 58.0°C and the stirrer speed was set at 500 rpm. The conversion of the feed was 49.9% by weight and the OCE fraction was 9.1% by weight. The molecular weight of the final product was 941 g / mol, the polydispersity was 1.60, the EO incorporation was 49.4 mol% and the color was 8 APHA.

Embodiment 3

[0124] A feed composition consisting of 27.0 wt% EO, 0.41 wt% deionized water as MWCA and the balance THF was premixed in a stainless steel vessel. The feed was fed through the above reactor under the following conditions: residence time in the reactor was 3.25 hours; reactor temperature was 62.1 °C and stirrer speed was set at 500 rpm. The conversion of the feed was 69.5% by weight and the OCE fraction was 6.5% by weight. The molecular weight of the final product was 3277 g / mol, the polydispersity was 2.00, the EO incorporation was 49.5 mol % and the color was 18 APHA.

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Abstract

The present invention relates to an improved, fully-integrated continuous process of enhanced process operability for manufacturing copolyether glycols having enhanced physical properties by polymerization of a reaction mixture comprising tetrahydrofuran and at least one alkylene oxide in the presence of an acid catalyst and at least one compound containing reactive hydrogen atoms. The copolyether glycols manufactured by the present process have enhanced physical properties of increased alkylene oxide incorporation, average molecular weight and polydispersity, as well as reduced crystallinity, color, oligomeric cyclic ether content, and linear oligomer having an average molecular weight of up to about 400 dalton content.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to Provisional Application No. 61 / 287,576, filed December 17, 2009. This application is hereby incorporated by reference in its entirety in Provisional Application No. 61 / 287,576. field of invention [0003] The present invention relates to an improved, fully integrated continuous process for, by combining tetrahydrofuran (THF) with at least one other compound in the presence of an acid catalyst and at least one compound containing reactive hydrogen atoms, Copolyether diols are prepared by polymerizing reaction mixtures of cyclic ethers such as alkylene oxide (AO). More specifically, the present invention relates to a fully integrated continuous process with enhanced process operability for the preparation of random copolyether diols having: from about 25 mole percent to about 55 mole percent epoxy Alkane molar incorporation; number average molecular weight from about 650 Daltons to abo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G65/20C08G65/28C08G65/30
CPCC08G65/2678C08G65/2696C08G65/2684C08G65/20C08G65/30
Inventor 罗伯特·B·奥斯本孙群孙燕慧格雷格·M·西斯勒罗伊·N·伊斯曼罗伯特·D·奥兰迪
Owner INVISTA TECHNOLOG IES S A R L