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    Process for the solvent-based extraction of polyhydroxyalkanoates from biomass
    3.
    发明授权
    Process for the solvent-based extraction of polyhydroxyalkanoates from biomass 有权
    从生物质中溶剂萃取聚羟基链烷酸酯的方法

    公开(公告)号：US07378266B2

    公开(公告)日：2008-05-27

    申请号：US11169450

    申请日：2005-06-29

    申请人： Karunakaran Narasimhan ,  Angella Christine Cearley ,  Michael Steven Gibson ,  Stanley James Welling

    发明人： Karunakaran Narasimhan ,  Angella Christine Cearley ,  Michael Steven Gibson ,  Stanley James Welling

    IPC分类号： C12N1/00 ,  C12P7/62 ,  C08J3/00

    CPC分类号： B01D11/0288 ,  C08G63/06 ,  C08G63/89

    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.

    摘要翻译： 用于从含有聚羟基链烷酸酯的生物质提取聚羟基链烷酸酯的改进方法包括以下步骤：将含有聚羟基链烷酸酯的生物质与选自下链酮的溶剂及其混合物组合以形成生物质液体，其中生物质液体包含小于约25％的水 ; 在约70℃至约120℃的温度范围内将生物质液体混合约10至约300分钟; 将聚羟基链烷酸酯与生物质液体分离以形成富含PHA的液体，其中分离在至少约40℃的温度下进行; 将富含PHA的液体与水混合以形成沉淀的聚羟基链烷酸酯和不纯的溶剂液体，其中水与富含PHA的液体以至少约0.4-1份的水与一份溶剂的比例混合; 并从不纯的溶剂液中回收沉淀的聚羟基链烷酸酯。 使用氧化剂或温和表面活性剂或温和漂白剂进行任选处理以增强颜色和气味。

    Solvent extraction of polyhydroxyalkanoates from biomass
    4.
    发明授权
    Solvent extraction of polyhydroxyalkanoates from biomass 有权
    从生物质中提取聚羟基链烷酸酯

    公开(公告)号：US07226765B2

    公开(公告)日：2007-06-05

    申请号：US11169448

    申请日：2005-06-29

    申请人： Karunakaran Narasimhan ,  Kenneth Yee ,  Angella Christine Cearley ,  Donald Levengood ,  Guo-Qiang Chen

    发明人： Karunakaran Narasimhan ,  Kenneth Yee ,  Angella Christine Cearley ,  Donald Levengood ,  Guo-Qiang Chen

    IPC分类号： C12P7/62 ,  C08L61/00 ,  C08L61/06 ,  C08G63/00 ,  C08G63/66

    CPC分类号： C08G63/89 ,  B01D11/0288 ,  C08G63/06 ,  C08G63/90

    摘要： 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. A PHA-enriched liquor and a concentrated PHA-enriched liquor.

    摘要翻译： 用于从生物质提取PHA的方法，所述方法包括：将含有PHAs的生物质与单一主要溶剂组合以形成生物质液体; 加热所述生物质液体以使所述PHA至少部分地从所述生物质中溶解以形成PHA液体; 将生物质与PHA液分离以形成富含PHA的液体; 从富含PHA的液体中蒸发单一主要溶剂的0％至约50％以形成溶剂蒸气和浓缩的富含PHA的液体; 并冷却浓缩的富含PHA的液体以形成沉淀的PHA和不纯的溶剂液体。 任选地，在压力下通过过滤进一步从不纯的溶剂液中回收沉淀的PHA。 富含PHA的液体和浓缩的富含PHA的液体。