Method for producing polyhydroxyalkanoate crystal

Details Method for producing polyhydroxyalkanoate crystal Method for producing polyhydroxyalkanoate crystal

2006-08-29

2006-08-29

Boykin, Terressa (Department: 1711)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Treating polymer containing material or treating a solid...

C426S623000, C426S635000, C528S191000, C528S495000, C528S499000

Reexamination Certificate

active

07098298

ABSTRACT:
The present invention provides a method for conveniently obtaining a biodegradable polyhydroxyalkanoate by a solvent extraction method. A method for producing a polyhydroxyalkanoate crystal 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.

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