PROCESS FOR PRODUCING POLYHYDROXYALKANOATE CRYSTAL

The present invention provides a method for conveniently obtaining a biodegradable polyhydroxyalkanoate by a solvent extraction method. A method for producing a polyhydroxyalkanoate crystal which comprises precipitating a polyhydroxyalkanoate crystal using a monohydric alcohol having 4 to 10 carbon...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	KINOSHITA, KOICHI, NARASIMHAN, KARUNAKARAN, NODA, ISAO, CEARLEY, ANGELLA, CHRISTINE, OSAKADA, FUMIO, YEE, KENNETH, UEDA, YASUYOSHI
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	CHEMISTRY COMPOSITIONS BASED THEREON MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP
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Beschreibung
Zusammenfassung:	The present invention provides a method for conveniently obtaining a biodegradable polyhydroxyalkanoate by a solvent extraction method. A method for producing a polyhydroxyalkanoate crystal which comprises precipitating a polyhydroxyalkanoate crystal using a monohydric alcohol having 4 to 10 carbon atoms as a extraction solvent, keeping a polyhydroxyalkanoate solution containing 0.1 to 10% by weight of water relative to the total amount of the solution warm at 70°C or higher, and cooling the solution to below 70°C.