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    PROCESS FOR PREPARING AN OLEFIN OXIDE
    1.
    发明公开
    PROCESS FOR PREPARING AN OLEFIN OXIDE 审中-公开

    公开(公告)号：US20240158361A1

    公开(公告)日：2024-05-16

    申请号：US18280742

    申请日：2022-03-10

    Applicant: BASF SE ,  Dow Global Technologies LLC

    Inventor： Dominic RIEDEL ,  Dylan SEGERS ,  Joaquim Henriqu TELES ,  Philip KAMPE ,  Meinolf WEIDENBACH ,  Franciscus Johannes Robertus VAN NEER ,  Malte SCHULZ

    IPC: C07D301/12 ,  B01J8/06

    CPC classification number: C07D301/12 ,  B01J8/06

    Abstract: The present invention relates to a process for preparing an olefin oxide from a reaction mixture stream in an epoxidation reactor R, wherein R contains z active reaction tubes T(i) arranged in parallel, z≥2, i=1 . . . z, wherein each T(i) comprises a reaction zone Z(i) comprising a heterogeneous epoxidation catalyst, said reaction mixture stream comprising x components C(j), x≥3, j=1 . . . x, the process comprising (i) providing m educt streams E(k), m≥1, k=1 . . . m, wherein each E(k) exhibits a mass flow rate FE(k) and comprises y components C(j), y=1 . . . x, wherein a given component C(j) is contained in at least one E(k); (ii) dividing each E(k) into n educt substreams S(k,i), n≤z, each S(k,i) exhibiting a mass flow rate Fs(k,i), wherein to at least one E(k), the inequality (1) applies: Formulas (1), (2), (3), (iii) providing n reaction mixtures streams M(i) comprising the x components C(j), said providing comprising, for each i, either combining and admixing the n educt substreams S(k,i) obtaining the n reaction mixtures M(i) if m>1, or passing on the n educt substreams S(k,i) as the n reaction mixtures M(i) if m=1; (iv) feeding each M(i) obtained according to (iii) into Z(i) and contacting each M(i) in Z(i) with the epoxidation catalyst under epoxidation reaction conditions; wherein the x components C(j) comprise hydrogen peroxide, an organic solvent, and the olefin. The present invention further relates to an olefin oxide obtained or obtainable from said process.

    SHUTDOWN METHOD FOR A PROCESS FOR PREPARING AN OLEFIN OXIDE
    2.
    发明公开
    SHUTDOWN METHOD FOR A PROCESS FOR PREPARING AN OLEFIN OXIDE 审中-公开

    公开(公告)号：US20240279194A1

    公开(公告)日：2024-08-22

    申请号：US18569645

    申请日：2022-06-14

    Applicant: BASF SE ,  Dow Global Technologies LLC

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

    IPC: C07D303/04

    CPC classification number: C07D303/04

    Abstract: In a first aspect, the present invention relates to a shutdown method for a process for preparing an olefin oxide comprising a normal run stage, wherein the normal run stage comprises providing olefin, hydrogen peroxide and organic solvent into an epoxidation zone comprising an heterogeneous epoxidation catalyst, so that a reaction mixture comprising olefin, hydrogen peroxide and organic solvent is formed and subjecting the reaction mixture to epoxidation reaction conditions in the epoxidation zone, thereby obtaining a mixture comprising olefin oxide and organic solvent; wherein the shutdown method comprises (a) providing olefin and organic solvent for a period of time t1 to the epoxidation zone, so that a mixture is formed, which is essentially free of hydrogen peroxide; (b) contacting the mixture from (a) over t1 under epoxidation reaction conditions in the epoxidation zone with the heterogeneous epoxidation catalyst; (c) removing during t1 an effluent stream from the epoxidation zone, the effluent stream comprising olefin and organic solvent. In a second aspect, the present invention relates to a process for preparing an olefin oxide comprising a normal run stage and a shutdown stage, wherein the normal run stage comprises (A) providing olefin, hydrogen peroxide, water and organic solvent into an epoxidation zone comprising an heterogeneous epoxidation catalyst, so that a reaction mixture comprising olefin, hydrogen peroxide, water and organic solvent is formed; (B) subjecting the reaction mixture from (I) to epoxidation reaction conditions in the epoxidation zone, thereby obtaining a mixture comprising olefin oxide, water and organic solvent; (C) removing an effluent stream from the epoxidation zone, comprising olefin oxide, water and organic solvent; wherein the shutdown stage comprises steps (a), (b) and (c) as described with respect to the first aspect.

    PROCESS FOR THE PREPARATION OF A LIQUID MIXTURE COMPRISING METHANOL, WATER AND HYDROGEN PEROXIDE
    3.
    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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