Extraction of poly(.beta.-hydroxybutyric acid)

Details Extraction of poly(.beta.-hydroxybutyric acid) Extraction of poly(.beta.-hydroxybutyric acid)

1982-02-12

1983-07-05

Woo, Jay H.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

264211, 264322, 528189, 528361, 528491, D01D 512

Patent

active

043917666

ABSTRACT:
.beta.-Hydroxybutyric acid polymers are extracted from micro-organism cells by contact with a solvent, such as 1,2-dichloroethane which is a poor solvent for the polymer once it has been precipitated.
The solution obtained by extraction is caused to gel and then solvent is expelled by subjecting the gel to a deformation process. Expelled solvent is recovered for extraction of polymer from a further quantity of cells.

REFERENCES:
patent: 4140741 (1979-02-01), Lafferty et al.
patent: 4324907 (1982-04-01), Senior et al.
patent: 4358583 (1982-11-01), Walker et al.

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