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    • 9. 发明授权
    • Process and apparatus for liquid-liquid extraction
    • 液 - 液萃取工艺及装置
    • US06413429B1
    • 2002-07-02
    • US09754159
    • 2001-01-04
    • Berthold Berend BremanJan Visser
    • Berthold Berend BremanJan Visser
    • B02D1100
    • B01D11/0449B01D11/0457Y10S210/05
    • Claimed are a process and an apparatus for extracting a component dissolved in a liquid by means of liquid-liquid extraction using an extraction liquid which is immiscible or only partially miscible with the liquid, in which process the extraction liquid is dispersed in the liquid in a dispersion apparatus and then coalesced in a coalescer, after which the ex traction liquid, the specific weight of which differs by at least 5% from the specific weight of the liquid to be extracted in which the component to be extracted is to be found, is separated from the liquid by gravity in a phase separator in which process in order to obtain an efficiency per extraction stage of at least 0.9 at an average residence time of at most 15 seconds in the dispersion apparatus and of at most 300 seconds in the phase separator, at a linear velocity in the coalescer related to its cross-section of at least 30 m/hour: a. the dispersion apparatus used is a centrifugal pump which will give droplets having an average diameter of 5 to 500 &mgr;m, b. the coalescer used is a packed bed of 5-100 cm high composed of dimensionally stable particles wettable by the extraction liquid having an average particle size of 0.05 to 2 mmL and c. the coagulated phase in the phase separator is separated at a linear velocity related to the cross-section of the phase separator of 0.1 to 0.7 times the linear velocity in the coalescer.
    • 本发明提供了一种通过使用与液体不混溶或仅部分混溶的萃取液的液 - 液萃取来提取溶解在液体中的组分的方法和装置,在该方法中,萃取液在液体中分散在液体中 分散装置,然后在聚结器中聚结,之后其比重与要提取的组分的待提取液体的比重相差至少5%的前牵引液体为 在相分离器中通过重力与液体分离,其中在分散装置中,为了在分散装置中平均停留时间至多为15秒,并且在相分离器中至多300秒,每个萃取阶段获得至少0.9的效率 在与聚结器相关的线速度至少为30m /小时的横截面上:a。 使用的分散装置是一种离心泵,其将产生平均直径为5至500μm的液滴,b。 所使用的聚结器是由平均粒径为0.05-2mmL的萃取液可湿化的尺寸稳定的颗粒组成的5-100cm高的填充床。 相分离器中的凝固相以与分离器的横截面相关的线速度分离成聚结器中的线速度的0.1至0.7倍。