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    • 1. 发明授权
    • Immobilization of enzymes with a fluidized bed for use in an organic
medium
    • 用流化床固定酶用于有机介质
    • US6156548A
    • 2000-12-05
    • US210192
    • 1998-12-11
    • Morten Wurtz ChristensenOle KirkChristian Pedersen
    • Morten Wurtz ChristensenOle KirkChristian Pedersen
    • C12N11/00C12N11/08C12N11/14C12P7/64
    • C12N11/08C12N11/00C12N11/14
    • An immobilized enzyme preparation for use in an organic medium essentially devoid of free water is prepared using a fluidized bed. An enzyme-containing liquid medium is contacted with a particulate porous carrier which preferably has a particle size of 200-1000 .mu.m and a surface area of 20-1000 m.sup.2 /g, and volatile components of the liquid medium are removed to fix or adsorb the enzyme on the carrier. The carrier may have a hydrophilic surface and an amount of liquid medium is used to prevent agglomeration of the carrier. The enzyme can be adsorbed on a carrier having a hydrophobic surface, and the addition of a hygroscopic substance suppresses agglomeration of the carrier by absorbing excess liquid. The hygroscopic substance may be removed during the removal of volatile components. Contacting of the enzyme-containing liquid and carrier is in a fluidized bed where immobilization and removing volatile components are conducted simultaneously, or contacting is in mixer followed by removing volatile components in a fluidized bed. The enzyme-containing liquid may be atomized onto the carrier in the fluidized bed or in the mixer. Enzymes immobilized include lipase, and the immobilized lipase is used in a trans-esterification reaction.
    • 使用流化床制备用于基本上不含游离水的有机介质中的固定化酶制剂。 将含酶液体介质与优选粒径为200-1000μm,表面积为20-1000m 2 / g的颗粒状多孔载体接触,除去液体介质的挥发性成分以固定或吸附 载体上的酶。 载体可以具有亲水表面,并且使用一定量的液体介质来防止载体的附聚。 酶可以吸附在具有疏水性表面的载体上,并且吸湿性物质的添加通过吸收多余的液体来抑制载体的聚集。 在去除挥发性组分期间可以除去吸湿性物质。 含酶液体和载体的接触在流化床中,其中同时进行固定和除去挥发性组分,或者在混合器中接触,然后在流化床中除去挥发性组分。 含酶液体可以在流化床或混合器中雾化到载体上。 固定的酶包括脂肪酶,并且固定的脂肪酶用于酯交换反应。