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    Catalyst for producing ethylene oxide by gas-phase oxidation
    1.
    发明授权
    Catalyst for producing ethylene oxide by gas-phase oxidation 有权

    公开(公告)号：US12121881B2

    公开(公告)日：2024-10-22

    申请号：US17285799

    申请日：2019-09-19

    申请人： BASF SE

    发明人： Andrey Karpov ,  Marco Oskar Kennema ,  Nicolas Duyckaerts ,  Christian Walsdorff ,  Christian Bartosch ,  Juergen Zuehlke ,  Miguel Angel Romero Valle

    IPC分类号： B01J23/68 ,  B01J21/04 ,  B01J35/40 ,  B01J35/56 ,  B01J35/61 ,  B01J35/63 ,  B01J35/64 ,  B01J35/66 ,  B01J37/02 ,  B01J37/08 ,  C07D301/04

    CPC分类号： B01J23/688 ,  B01J21/04 ,  B01J35/40 ,  B01J35/56 ,  B01J35/612 ,  B01J35/633 ,  B01J35/635 ,  B01J35/651 ,  B01J35/653 ,  B01J35/657 ,  B01J35/695 ,  B01J37/0213 ,  B01J37/082 ,  C07D301/04

    摘要： 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 multilobe structure; a plurality of passageways extending from the first face side surface to the second face side surface, outer passageways being arranged around a central passageway with one outer passageway being assigned to each lobe, wherein neighboring outer passageways are arranged essentially equidistantly to each other and the outer passageways are arranged essentially equidistantly to the central passageway; a minimum wall thickness A between two neighboring passageways in the range of 0.6 to 1.3 mm; a minimum wall thickness B between each outer passageway and the circumferential surface in the range of 1.1 to 1.8 mm; and a BET surface area in the range of 1.6 to 3.0 m2/g. The shaped catalyst bodies allow for a favorable balance between mechanical stability, pressure drop and selectivity. The invention also relates to a process for producing ethylene oxide by gas-phase oxidation of ethylene, comprising reacting ethylene and oxygen in the presence of a shaped catalyst body as defined above. The invention further relates to a process for preparing a shaped catalyst body as above, comprising i) impregnating a refractory support having a BET surface area in the range of 1.4 to 2.5 m2/g with a silver impregnation solution; and ii) subjecting the impregnated refractory support to a calcination process; wherein steps i) and ii) are optionally repeated.

    Optimization of Geometry of Shaped Body and Manufacturing Tools
    3.
    发明申请
    Optimization of Geometry of Shaped Body and Manufacturing Tools 有权

    公开(公告)号：US20230004686A1

    公开(公告)日：2023-01-05

    申请号：US17779780

    申请日：2020-11-26

    申请人： BASF SE

    发明人： Marcelo Daniel Kaufman Rechulski ,  Miguel Angel Romero Valle ,  Stefan Lipp ,  Marco Oskar Kennema ,  Matthias Johannes Wagner

    IPC分类号： G06F30/10 ,  G06F30/27

    摘要： A computer-implemented method (110) for designing at least one shaped body (112), a computer-implemented method (138) for designing a manufacturing process for manufacturing at least one shaped body (112), a designing system (152) for designing at least one shaped body (112) and a manufacture-designing system for designing a manufacturing process for manufacturing at least one shaped body (112). The computer-implemented method (110) for designing at least one shaped body (112) comprises: a) retrieving, by using at least one interface (154), at least one set of target criteria for the shaped body (112); b) defining, by using at least one geometry defining unit (156), at least one seed geometry for the shaped body (112); c) generating, by using at least one parameter generating unit (158), a set of parameters comprising at least one geometry parameter of the seed geometry; d) simulating, by using at least one simulation unit (160), the shaped body by varying values of the set of parameters and by corn-paring simulated criteria for these values with the set of target criteria, thereby generating at least one adapted set of parameters for which the target criteria are fulfilled at least within predetermined tolerances; and e) determining, by using at least one lead candidate geometry defining unit (162), at least one lead candidate geometry of the at least one shaped body (112) from the adapted set of parameters.