Solvent extraction of polyhydroxyalkanoates from biomass...

Details Solvent extraction of polyhydroxyalkanoates from biomass... Solvent extraction of polyhydroxyalkanoates from biomass...

C - Chemistry, Metallurgy

08

G

C08G 63/89 (2006.01) C08G 63/06 (2006.01) C12P 7/62 (2006.01)

Patent

CA 2230049

The present invention relates to a process for separating polyhydroxyalkanoate (PHA) from a biomass comprising the PHA, the process comprising: (a) treating the biomass with a PHA solvent and a marginal nonsolvent for PHA; (b) removing any insoluble biomass, thereby leaving behind a solution of PHA and marginal nonsolvent for PHA and (c) removing the PHA solvent from the solution, thereby resulting in a suspension of precipitated PHA in the marginal nonsolvent for PHA. Optionally, the process further comprises removing the marginal nonsolvent for PHA, thereby leaving behind the PHA. The present invention further relates to the suspension and the PHA produced by the process.

Procédé de séparation de polyhydroxyalcanoate (PHA) d'une biomasse comportant ledit PHA, qui consiste à (a) traiter la biomasse à l'aide d'un solvant pour PHA et d'un non-solvant marginal pour PHA, (b) à éliminer toute biomasse insoluble pour obtenir ainsi une solution de PHA et de non-solvant marginal pour PHA et (c) à éliminer le solvant pour PHA de la solution, ce qui permet d'obtenir une suspension de PHA précipité dans le non-solvant marginal pour PHA. Eventuellement, ledit procédé consiste à éliminer le non-solvant marginal pour PHA pour obtenir ainsi le PHA. La présente invention concerne en outre la suspension et le PHA produit par ledit procédé.

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