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    • 35. 发明授权
    • Process for separating crystallizable fractions from mixtures thereof
    • 从其混合物中分离可结晶级分的方法
    • US4129583A
    • 1978-12-12
    • US871964
    • 1978-01-24
    • Klaus Zondek
    • Klaus Zondek
    • C11B7/00C09F5/10C10G43/06C11B3/00
    • C11B7/0008
    • In a continuous process for separating crystallizable organic components from mixtures thereof in solution, a feedstock of such components is mixed with at least one solvent therefor and the resulting feedstock mixture is continuously fed into a vessel in which a baffle defines a partially confined first zone and a partially confined second zone communicating with the first zone. At least one low-boiling point high-vapor pressure refrigerant is injected into the feedstock mixture in the first zone and evaporates and adiabatically expands therein to effect rapid cooling of the mixture to a selected low temperature and thereby form a slurry of microcrystals of components which are crystallizable down to the selected temperature. The resulting slurry is conducted to the second zone where it is contacted with warmer incoming feedstock mixtures to achieve an intermediate temperature at which crystals of lower melting point components melt and are redissolved while crystals of higher melting point components undergo crystal growth to form a slurry of larger crystals. The resulting slurry is withdrawn from the second zone and filtered to separate the crystals from the withdrawn slurry.
    • 在将可结晶有机组分与其混合物在溶液中分离的连续方法中,将这些组分的原料与至少一种溶剂混合,并将所得原料混合物连续进料到容器中,其中挡板限定部分限制的第一区和 与第一区域通信的部分限制的第二区域。 至少一个低沸点高蒸汽压制冷剂被注入到第一区域中的原料混合物中,并蒸发并在其中绝热膨胀以使混合物快速冷却至所选择的低温,从而形成组分的微晶浆料 可结晶至选定温度。 将所得浆液送至第二区域,在此第二区域与较热的进料混合物接触,以达到中间温度,在此温度下,较低熔点组分的晶体熔化并重新溶解,而较高熔点组分的晶体经历晶体生长,形成浆料 较大的晶体。 将得到的浆液从第二区域取出并过滤,从析出的浆液中分离晶体。