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    Process for preparing mono-long chain amine oxide surfactants with low nitrite, nitrosamine and low residual peroxide
    1.
    发明授权
    Process for preparing mono-long chain amine oxide surfactants with low nitrite, nitrosamine and low residual peroxide 有权
    制备具有低亚硝酸盐，亚硝胺和低残留过氧化物的单长链氧化胺表面活性剂的方法

    公开(公告)号：US06294514B1

    公开(公告)日：2001-09-25

    申请号：US09200391

    申请日：1998-11-24

    Applicant: Stanley James Welling

    Inventor： Stanley James Welling

    IPC: C11D175

    CPC classification number: C07C291/04

    Abstract: Mono-long chain amine oxide surfactants can be prepared containing active levels of greater than about 30%, by weight of amine, and with low nitrite and nitrosamine levels and low levels of residual hydrogen peroxide when oxidized under controlled temperature conditions in the presence of bicarbonate material present at levels less than about 2.5%, by weight of amine, and without the presence of phase-modifying solvents.

    Abstract translation: 可以制备单长链氧化胺表面活性剂，其含有大于约30重量％的胺的活性水平，并且在碳酸氢盐存在下在受控温度条件下氧化时，具有低亚硝酸盐和亚硝胺水平和低水平的残余过氧化氢 材料的含量低于约2.5％（重量），不存在相变溶剂。

    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

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

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

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

    CPC classification number: B01D11/0288 ,  C08G63/06 ,  C08G63/89

    Abstract: 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.

    Abstract translation: 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。

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