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    Process for the solvent-based extraction of polyhydroxyalkanoates from biomass
    2.
    发明申请
    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：US20050287654A1

    公开(公告)日：2005-12-29

    申请号：US11169450

    申请日：2005-06-29

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

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

    IPC分类号： B01D11/02 ,  C08G63/06 ,  C08G63/89 ,  C12P7/62

    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。

    Process for the extraction of polyhydroxyalkanoates from biomass
    3.
    发明申请
    Process for the extraction of polyhydroxyalkanoates from biomass 审中-公开
    从生物质提取聚羟基链烷酸酯的方法

    公开(公告)号：US20060057691A1

    公开(公告)日：2006-03-16

    申请号：US11225357

    申请日：2005-09-13

    申请人： Karunakaran Narasimhan ,  Roland Severson ,  Susan Buescher ,  Angella Cearley ,  Michael Gibson ,  Stanley Welling

    发明人： Karunakaran Narasimhan ,  Roland Severson ,  Susan Buescher ,  Angella Cearley ,  Michael Gibson ,  Stanley Welling

    IPC分类号： C12P7/62

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

    摘要： The present invention relates to a process for extracting polyhydroxyalkanoate from a biomass, comprising contacting the biomass with an organic solvent for a time, at a first temperature, and under a pressure that are sufficient to extract polyhydroxyalkanoate from the biomass to provide a composition comprising the organic solvent and polyhydroxyalkanoate; cooling the composition at a second temperature, which is at least about 10° C. lower than the first temperature; and mixing the composition at a second temperature with a power to volume ratio of from about 0.001 KW/m3 to about 100 KW/m3.

    摘要翻译： 本发明涉及从生物质提取聚羟基链烷酸酯的方法，包括在第一温度和足以从生物质提取聚羟基链烷酸酯的压力下将生物质与有机溶剂接触一段时间，以提供包含 有机溶剂和聚羟基链烷酸酯; 在比第一温度低至少约10℃的第二温度下冷却组合物; 并在第二温度下混合该组合物，其功率与体积比为约0.001KW / m 3至约100KW / m 3。