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    H2O2 WITHOUT DIBC FOR PO PRODUCTION
    1.
    发明公开
    H2O2 WITHOUT DIBC FOR PO PRODUCTION 审中-公开

    公开(公告)号：US20230145404A1

    公开(公告)日：2023-05-11

    申请号：US17911673

    申请日：2021-03-22

    Applicant: BASF SE ,  Dow Global Technologies LLC

    Inventor： Dominic RIEDEL ,  Joaquim Henrique TELES ,  Jaroslaw Michael MORMUL ,  Andrei-Nicolae PARVULESCU ,  Meinolf WEIDENBACH ,  Franciscus Johannes Robertus VAN NEER

    IPC: C07D301/12

    CPC classification number: C07D301/12

    Abstract: The invention relates in a first aspect to a process for the preparation of propylene oxide, comprising: (i) providing a reaction mixture comprising propylene, water, organic solvent, and hydrogen peroxide; (ii) contacting the reaction mixture provided in (i) in an epoxidation zone with an epoxidation catalyst comprising a zeolitic material having a framework structure comprising Si, O, and Ti, and subjecting the reaction mixture to epoxidation reaction conditions in the epoxidation zone, obtaining, in the epoxidation zone, a mixture comprising propylene oxide, water, and organic solvent; (iii) removing an effluent stream from the epoxidation zone, the effluent stream comprising propylene oxide, water, and organic solvent; wherein the reaction mixture provided in (i) and subjected to (ii) contains in an amount of at most 500 mg per kg hydrogen peroxide comprised in said reaction mixture at least one aliphatic oxygen containing compound having 8 to 10 carbon atoms. The invention further relates in a second aspect to a reaction mixture for preparing propylene oxide, comprising propylene, water, organic solvent, and hydrogen peroxide, wherein the reaction mixture comprises at least one aliphatic oxygen containing compound having 8 to 10 carbon atoms in an amount of at most 500 mg per kg hydrogen peroxide comprised in the reaction mixture. In a third aspect, the invention relates to a system comprising an epoxidation catalyst comprising a zeolitic material having a framework structure comprising Si, O, and Ti, and further comprising the reaction mixture comprising propylene, water, and organic solvent according to the second aspect. In a fourth aspect, the invention relates to the use of an aqueous hydrogen peroxide solution as epoxidation agent for preparing propylene oxide in the presence of an organic solvent and an epoxidation catalyst comprising a zeolitic material having a framework structure comprising Si, O, and Ti, wherein the aqueous hydrogen peroxide solution comprises at least one aliphatic oxygen containing compound having 8 to 10 carbon atoms in an amount of at most 500 mg per kg hydrogen peroxide comprised in the aqueous hydrogen peroxide solution.

    PROCESS FOR THE PREPARATION OF A LIQUID MIXTURE COMPRISING METHANOL, WATER AND HYDROGEN PEROXIDE
    7.
    发明公开
    PROCESS FOR THE PREPARATION OF A LIQUID MIXTURE COMPRISING METHANOL, WATER AND HYDROGEN PEROXIDE 审中-公开

    公开(公告)号：US20240294483A1

    公开(公告)日：2024-09-05

    申请号：US18572209

    申请日：2022-06-22

    Applicant: BASF SE ,  Dow Global Technologies LLC

    Inventor： Andrei-Nicolae PARVULESCU ,  Joaquim Henrique TELES ,  Dominic RIEDEL ,  Dylan SEGERS ,  Massimo BERGAMO ,  Franciscus Johannes Robertus VAN NEER ,  Meinolf WEIDENBACH

    IPC: C07D301/12

    CPC classification number: C07D301/12

    Abstract: The present invention relates in a first aspect to a process for the preparation of a liquid mixture comprising methanol, water and hydrogen peroxide, the process comprising: (i) providing a feed stream comprising methanol, and a feed stream comprising an aqueous hydrogen peroxide solution; (ii) combining the feed stream comprising the methanol and the feed stream comprising the aqueous hydrogen peroxide solution provided according to (i) at a point in time t1, so that a combined stream comprising methanol, hydrogen peroxide and water is obtained; (iii) filtrating the combined stream obtained according to (ii) at a point in time t2, through a filtration device, thereby obtaining a liquid mixture comprising methanol, hydrogen peroxide and water; wherein the period of time between t1 and t2 is at least 8 seconds. In a second aspect, the invention relates to the use of a liquid mixture obtained or obtainable from the process of the first aspect for the preparation of propylene oxide. A third aspect of the invention is directed to a method for the preparation of propylene oxide comprising: (i) providing a feed stream comprising methanol, a feed stream comprising an aqueous hydrogen peroxide solution and a feed stream comprising propylene; (ii) combining the feed stream comprising the methanol and the feed stream comprising the aqueous hydrogen peroxide solution provided according to (i) at a point in time t1, so that a combined stream comprising methanol, hydrogen peroxide and water is obtained; (iii) filtrating the combined stream obtained according to (ii) at a point in time t2, through a filtration device, thereby obtaining a liquid mixture comprising methanol, hydrogen peroxide and water; (iv) combining the feed stream comprising propylene either with the combined stream obtained in (ii) or with the liquid mixture obtained in (iii), thereby obtaining a liquid mixture comprising methanol, hydrogen peroxide, water and propylene; (v) bringing the liquid mixture obtained according to (iv) in an epoxidation zone in contact with an epoxidation catalyst comprising a zeolitic material having a framework structure comprising Si, O, and Ti under epoxidation reaction conditions, thereby obtaining in the epoxidation zone a mixture comprising propylene oxide, methanol and water; wherein the period of time between t1 and t2 are at least 8 seconds. In a fourth aspect, the invention relates to propylene oxide, obtained or obtainable from the method according to the third aspect.

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