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    PROCESS FOR PRODUCING AN EPOXIDATION CATALYST
    23.
    发明公开
    PROCESS FOR PRODUCING AN EPOXIDATION CATALYST 审中-公开

    公开(公告)号：EP3885038A1

    公开(公告)日：2021-09-29

    申请号：EP20166176.6

    申请日：2020-03-27

    Applicant: BASF SE

    Inventor： KARPOV, Andrey

    IPC: B01J23/50 ,  C07D301/00 ,  B01J37/02

    Abstract: A process for producing an epoxidation catalyst, comprising: i) placing a porous support under reduced pressure, the porous support having an Hg pore volume in the range of 0.4 to 3.0 mL/g, as determined by mercury porosimetry; ii) gradually adding to the porous support a volume of aqueous silver impregnation solution over a period of at least 15 min at a temperature of 40 to 150 °C, while maintaining reduced pressure; the volume of aqueous silver impregnation solution added per gram of porous support being greater than the Hg pore volume of the porous support; iii) maintaining the reduced pressure to remove volatiles to a weight loss of at least 3 wt.-%, relative to the weight of aqueous silver impregnation solution; iv) calcining the impregnated porous support at a temperature of 200 to 800 °C. The process allows for a uniform distribution of silver with a high degree of silver dispersion. The invention further relates to a process for producing an alkylene oxide by gas-phase oxidation of an alkylene, comprising reacting an alkylene and oxygen in the presence of the epoxidation catalyst.

    CATALYST FOR PRODUCING ETHYLENE OXIDE BY GAS-PHASE OXIDATION
    24.
    发明公开
    CATALYST FOR PRODUCING ETHYLENE OXIDE BY GAS-PHASE OXIDATION 审中-公开

    公开(公告)号：EP3659703A1

    公开(公告)日：2020-06-03

    申请号：EP18208856.7

    申请日：2018-11-28

    Applicant: BASF SE

    Inventor： KARPOV, Andrey

    IPC: B01J37/02 ,  B01J19/30 ,  B01J23/50 ,  B01J23/66 ,  B01J23/68 ,  B01J35/02 ,  B01J35/10 ,  C07D301/10

    Abstract: A shaped catalyst body for producing ethylene oxide by gas-phase oxidation of ethylene, comprising silver deposited on a porous refractory support, the shaped catalyst body having a first face side surface, a second face side surface and a circumferential surface, characterized by a content of at least 20 wt.-% of silver, relative to the total weight of the shaped catalyst body; a cylinder structure with n void spaces running in the cylinder periphery along the cylinder height to form an n-lobed structure, wherein n is 2, 3, 4, 5 or 6; n passageways extending from the first face side surface to the second face side surface, each passageway being assigned to one lobe, wherein neighboring passageways are arranged essentially equidistantly to each other; an n-fold rotational symmetry; a shortest distance A between two neighboring passageways in the range of 1.0 to 2.0 mm; a shortest distance B between each passageway and the circumferential surface in the range of 1.1 to 2.0 mm; and a BET surface area in the range of 1.6 to 3.0 m 2 /g. The shaped catalyst bodies allow for a favorable balance between mechanical stability, pressure drop and selectivity. The invention further relates to a reactor tube packed with the shaped catalyst bodies, a process for producing ethylene oxide by gas-phase oxidation of ethylene, comprising reacting ethylene and oxygen in the presence of the shaped catalyst bodies and to a process for preparing a shaped catalyst bodies.

    PROCESS FOR PRODUCING ETHYLENE OXIDE BY GAS-PHASE OXIDATION OF ETHYLENE
    25.
    发明公开
    PROCESS FOR PRODUCING ETHYLENE OXIDE BY GAS-PHASE OXIDATION OF ETHYLENE 审中-公开

    公开(公告)号：EP3639923A1

    公开(公告)日：2020-04-22

    申请号：EP18200481.2

    申请日：2018-10-15

    Applicant: BASF SE

    Inventor： KARPOV, Andrey ,  KENNEMA, Marco Oskar ,  DUYCKAERTS, Nicolas ,  WALSDORFF, Christian ,  ZUEHLKE, Jürgen ,  ROMERO VALLE, Miguel Angel

    IPC: B01J37/02 ,  B01J21/04 ,  B01J23/68 ,  B01J35/00 ,  B01J35/02 ,  B01J35/10

    Abstract: A process for producing ethylene oxide by gas-phase oxidation of ethylene, comprising: directing a feed comprising gaseous ethylene and gaseous oxygen through a packing of individual shaped catalyst bodies, under conditions conducive to obtain a reaction mixture containing at least 2.7 vol.-% of ethylene oxide, wherein each shaped catalyst body comprises silver deposited on a refractory support and is characterized by a content of at least 20 wt.-% of silver, relative to the total weight of the shaped catalyst body; a BET surface area in the range of 1.6 to 3.0 m 2 /g; and a thickness in the range of 0.7 to 2.0 mm, wherein thickness is defined as a distance twice the shortest distance from the geometric surface of the shaped catalyst body to a point inside the structure of the shaped catalyst body for which point the shortest distance is the largest among all points. The process allows for increased activity and/or stability of the catalyst while maintaining or increasing selectivity at high productivity.

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