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    PERMEATING EVAPORATION OF LIQUID MIXTURE USING MEMBRANE AND AZEOTROPIC SEPARATING METHOD BY DISTILLATION
    3.
    发明专利
    PERMEATING EVAPORATION OF LIQUID MIXTURE USING MEMBRANE AND AZEOTROPIC SEPARATING METHOD BY DISTILLATION 失效

    公开(公告)号：JPH06277456A

    公开(公告)日：1994-10-04

    申请号：JP1098394

    申请日：1994-02-02

    Applicant: BASF AG

    Inventor： ARUBUREHITO DAMUSU ,  YOOZEFU KURUUKU ,  KURISUTOFU PARUMU

    IPC: B01D3/36 ,  B01D61/36 ,  C07D307/08

    Abstract: PURPOSE: To separate an aqueous mixture by utilizing both pervaporation and azeotropy by first performing pervaporation until a concentration exceeding that of an azeotropic composition is reached and next obtaining an objective component by distillation and returning a light mixture liquid or a heavy mixture liquid generated consequently into pervaporation. CONSTITUTION: A component A is separated by pervaporation of a flow 1 containing aqueous mixtures A, B and C until a concentration exceeding that of an azeotropic composition is reached. In order to further separate the component A, mixtures A, B of a flow 2 are distilled and returned by a fractional distillation into an azeotropic component, and the like. Then, a flow 3 of the component B is obtained in a pure form as an exhausted liquid. Consequently, the co-existing component C being an azeotropic light liquid of components A, B is obtained by separation through distillation of itself.

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