Method of deionizing solution yielded by polyester...

Details Method of deionizing solution yielded by polyester... Method of deionizing solution yielded by polyester...

2007-12-11

2007-12-11

Prince, Fred G. (Department: 1724)

Liquid purification or separation

Processes

Ion exchange or selective sorption

C210S669000, C210S683000, C521S048500, C560S078000

Reexamination Certificate

active

10477092

ABSTRACT:
There is provided a method for deionizing a decomposition produced solution resulting from decomposition of a polyester by ethylene glycol. The ester interchange reaction and hydrolysis reaction along with cation removing treatment of a decomposition product resulting from decomposition of a polyester by ethylene glycol are suppressed. Thereby, a method for deionizing the decomposition produced solution with small reductions in yield and purity can be provided.

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patent: WO 01/10812 (2001-02-01), None
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patent: WO 02/10117 (2002-02-01), None
European Search Report which issued in the corresponding European patent application citing above reference.

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