Continuous process for the preparation of polytrimethylene ether glycol
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United States of America Patent
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Apr 13, 2004
Grant Date -
Jan 24, 2002
app pub date -
Dec 15, 2000
filing date -
Dec 17, 1999
priority date (Note) -
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Abstract
The invention is a continuous process for the preparation of polytrimethylene ether glycol from 1,3-propanediol reactant. In addition, the invention is directed to a continuous multi-stage process comprising reacting at least one reactant in a liquid phase in an up-flow column reactor, and forming a gas or vapor phase by-product wherein the gas or vapor phase by-product is continuously removed at the top and at least one intermediate stage.
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