C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 63/89 (2006.01) C08G 63/90 (2006.01)
Patent
CA 2570328
Processes for the extraction of PHAs from biomass, said processes comprising: combining the biomass containing the PHAs with a single main solvent to form a biomass liquor; heating the biomass liquor to at least partially solubilize the PHAs from the biomass to form a PHA liquor; separating the biomass from the PHA liquor to form a PHA-enriched liquor; evaporating from 0 % to about 50 % of the single main solvent from the PHA-enriched liquor to form a solvent vapor and a concentrated PHA-enriched liquor; and cooling the concentrated PHA- enriched liquor to form precipitated PHAs and an impure solvent liquor. Optionally, further recovering the precipitated PHAs from the impure solvent liquor by filtration under pressure.
L'invention concerne des procédés pour extraire des PHA à partir d'une biomasse. Ces procédés consistent à: combiner la biomasse contenant les PHA à un solvant principal unique pour former une liqueur de biomasse; chauffer la liqueur de biomasse pour solubiliser au moins partiellement les PHA provenant de la biomasse pour former une liqueur de PHA; séparer la biomasse de la liqueur de PHA pour former un liqueur enrichie en PHA; faire évaporer 0 % à 50 % environ du solvant principal unique de la liqueur enrichie en PHA pour former une vapeur de solvant et une liqueur enrichie en PHA concentrés; et faire refroidir la liqueur enrichie en PHA concentrés pour former des PHA précipités et une liqueur de solvant impure. En variante, le procédé peut consister à extraire les PHA précipités de la liqueur de solvant impure par une filtration sous pression.
Cearley Angella C.
Chen Guo-Qiang
Levengood Donald
Narasimhan Karunakaran
Yee Kenneth
Dimock Stratton Llp
Meredian Inc.
The Procter & Gamble Company
LandOfFree
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