Process and polycondensation apparatus for the treatment of contaminated ethylene glycol
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United States of America Patent
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Jun 3, 1997
Grant Date -
N/A
app pub date -
Aug 10, 1995
filing date -
Feb 27, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The invention relates to a process for the treatment of contaminated ethylene glycol resulting during a polycondensation process for the production of polyester. In the course of this polycondensation process contaminated ethylene glycol is continuously predistilled, subjected as a distillation residue to secondary distillation, condensed and then returned to the polycondensation process as decontaminated ethylene glycol, so that an in-line recovery is achieved, which makes superfluous an external distillation installation for the treatment of contaminated ethylene glycol.
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