PROCESS FOR THE REMOVAL OF CONTAMINANT FROM A HYDROCHLOROFLUOROOLEFIN BY EXTRACTIVE DISTILLATION
    4.
    发明公开
    PROCESS FOR THE REMOVAL OF CONTAMINANT FROM A HYDROCHLOROFLUOROOLEFIN BY EXTRACTIVE DISTILLATION 审中-公开
    萃取蒸馏消除盐酸氯氟烃污染的方法

    公开(公告)号:EP2819980A4

    公开(公告)日:2015-11-25

    申请号:EP13754019

    申请日:2013-02-22

    申请人: ARKEMA INC

    发明人: WISMER JOHN A

    IPC分类号: C07C17/386 B01D3/40 C07C21/18

    摘要: A method for removing a contaminant from a hydrochlorofluoroolefin (such as trans-1,1,1-trifluoro-3-chloro-2-propene (1233zd(E))) includes extracting a chlorofluorocarbon (such as trichlorofluoromethane (R11)) from a mixture comprising the hydrochlorofluoroolefin and the chlorofluorocarbon using extractive distillation in the presence of an extractive solvent comprising a chlorinated compound to form a purified hydrochlorofluoroolefin. This separation method provides for removal of a contaminant, such as R11, from a hydrochlorofluoroolefin, such as 1232zd(E), which are not separable by conventional distillation methods. The method may employ a process utilizing two distillation columns, for example, a first extractive distillation column and a second solvent recovery column, which allows for recycle of the extractive solvent to the first extractive distillation column.