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    A PROCESS FOR THE PREPARATION OF PROPYLENE OXIDE
    1.
    发明公开
    A PROCESS FOR THE PREPARATION OF PROPYLENE OXIDE 审中-公开

    公开(公告)号：EP3416954A1

    公开(公告)日：2018-12-26

    申请号：EP17705863.3

    申请日：2017-02-16

    Applicant: BASF SE

    Inventor： RIEDEL, Dominic ,  TELES, Joaquim H. ,  SCHELLING, Heiner ,  WEGERLE, Ulrike ,  MÜLLER, Ulrich ,  PARVULESCU, Andrei-Nicolae ,  MANNWEILER, Jochen ,  HENN, Timo ,  LÜDERITZ, Thomas ,  WÖRZ, Nicolai Tonio ,  MÜLLER, Christian ,  WEBER, Markus ,  URBANCZYK, Daniel

    IPC: C07D301/12 ,  C07D301/36

    Abstract: A continuous process for the preparation of propylene oxide, comprising a start-up stage and normal run stage, wherein the normal run stage comprises (i) continuously providing a liquid feed stream comprising propene, hydrogen peroxide, acetonitrile, a formate salt, water and optionally propane, wherein in the liquid feed stream, the molar amount of the formate salt relative to the molar amount of hydrogen peroxide at a given point of time during the normal run stage is aN(Fo/H2O2); (ii) continuously passing the liquid feed stream provided in (i) into an epoxidation zone comprising a catalyst comprising a titanium zeolite having framework type MWW, and subjecting the liquid feed stream to epoxidation reaction conditions in the epoxidation zone, obtaining a reaction mixture comprising propylene oxide, acetonitrile, water, the formate salt, optionally propene, and optionally propane; (iii) continuously removing an effluent stream from the epoxidation zone, the effluent stream comprising propylene oxide, acetonitrile, water, at least a portion of the formate salt, optionally propene, and optionally propane; wherein the normal run stage is characterized in an average rate of change of aN(Fo/H2O2) of less than 0 h−1.

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