发明名称 |
Process for the solvent-based extraction of polyhydroxyalkanoates from biomass |
摘要 |
Improved processes for extracting polyhydroxyalkanoate from a biomass containing the polyhydroxyalkanoate including the steps of: combining the biomass containing the polyhydroxyalkanoate with a solvent selected from lower chain ketones, and mixtures thereof to form a biomass liquor wherein the biomass liquor comprises less than about 25% water; mixing the biomass liquor for from about 10 to about 300 minutes at a temperature in the range of from about 70° C. to about 120° C.; separating the polyhydroxyalkanoate from the biomass liquor to form a PHA-enriched liquor, wherein the separating occurs at a temperature of at least about 40° C.; mixing the PHA-enriched liquor with water to form precipitated polyhydroxyalkanoate and an impure solvent liquor, wherein the water is mixed with the PHA-enriched liquor in the ratio of from at least about 0.4-1 parts of water to one part solvent; and recovering the precipitated polyhydroxyalkanoate from the impure solvent liquor. Optional treatment with oxidizing agents or mild surfactant or mild bleach is used to enhance color and odor.
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申请公布号 |
US7378266(B2) |
申请公布日期 |
2008.05.27 |
申请号 |
US20050169450 |
申请日期 |
2005.06.29 |
申请人 |
MEREDIAN, INC. |
发明人 |
NARASIMHAN KARUNAKARAN;CEARLEY ANGELLA CHRISTINE;GIBSON MICHAEL STEVEN;WELLING STANLEY JAMES |
分类号 |
C12N1/00;B01D11/02;C08G63/06;C08G63/89;C08J3/00;C12P7/62 |
主分类号 |
C12N1/00 |
代理机构 |
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主权项 |
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地址 |
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