Purification of ethylene glycol recovered from polyester resins

Details Purification of ethylene glycol recovered from polyester resins Purification of ethylene glycol recovered from polyester resins

1996-07-26

1997-09-30

Barts, Samuel

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

568858, C07C 2726

Patent

active

056727801

ABSTRACT:
There is described a process for removing dimethyl terephthalate contaminants from ethylene glycol. The process comprises distilling ethylene glycol in the presence of an ester exchange catalyst to cause reaction between ethylene glycol and dimethyl terephthalate to form compounds that are less volatile than either ethylene glycol or dimethyl terephthalate, such as bishydroxyethyl terephthalate.

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