METHOD FOR PURIFYING CYCLIC ESTER

METHOD FOR PURIFYING CYCLIC ESTER

PROBLEM TO BE SOLVED: To provide a simple method of purification, obtaining a high purity cyclic ester used as a raw material of a high molecular weight polyester, at a high yield. SOLUTION: This new method for purifying the cyclic ester expressed by formula (1) [wherein, R1to R6are each the same or...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: TAKAOKA MASAZUMI, MAEKAWA HIROKI, WADA MASARU
Format: Patent
Sprache:eng
Schlagworte:
CHEMISTRY
HETEROCYCLIC COMPOUNDS
METALLURGY
ORGANIC CHEMISTRY
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Beschreibung
Zusammenfassung:PROBLEM TO BE SOLVED: To provide a simple method of purification, obtaining a high purity cyclic ester used as a raw material of a high molecular weight polyester, at a high yield. SOLUTION: This new method for purifying the cyclic ester expressed by formula (1) [wherein, R1to R6are each the same or different H, or a 1-4C linear or branched alkyl: and (n) is an integer of 1 to 3] is characterized by mixing the cyclic ester expressed by the formula (1) with an isocyanate compound, heating and then distilling. COPYRIGHT: (C)2008,JPO&INPIT