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    PROCESS FOR PRODUCING A SILVER-BASED EPOXIDATION CATALYST
    2.
    发明申请
    PROCESS FOR PRODUCING A SILVER-BASED EPOXIDATION CATALYST 审中-公开

    公开(公告)号：WO2021191414A1

    公开(公告)日：2021-09-30

    申请号：PCT/EP2021/057894

    申请日：2021-03-26

    Applicant: BASF SE

    Inventor： KARPOV, Andrey ,  WALSDORFF, Christian ,  JOHANN, Thorsten ,  ALMER, Christian ,  RIECK, Daniela ,  BARTOSCH, Christian ,  GROBYS, Mauricio ,  WEINLAND, Tobias ,  BORCHERT, Holger

    IPC: B01J23/68 ,  B01J23/50 ,  B01J37/02 ,  B01J37/16 ,  B01J37/14 ,  C07D301/00 ,  B01J23/688 ,  B01J37/0203 ,  B01J37/0205

    Abstract: A process for producing a silver-based epoxidation catalyst, comprising i) impregnating a particulate porous refractory support with a first aqueous silver impregnation solution comprising silver ions and an aminic complexing agent selected from amines, alkanolamines and amino acids; ii) converting at least part of the silver ions impregnated on the refractory support to metallic silver by heating while directing a stream of a first gas over the impregnated refractory support to obtain an intermediate catalyst, wherein the first gas comprises at least 5 vol.-% oxygen; iii) impregnating the intermediate catalyst with a second aqueous silver impregnation solution comprising silver ions, an aminic complexing agent selected from amines, alkanolamines and amino acids, and one or more transition metal promoters, in particular rhenium; and iv) converting at least part of the silver ions impregnated on the intermediate catalyst to metallic silver by heating while directing a stream of a second gas over the impregnated intermediate catalyst to obtain the epoxidation catalyst, wherein the second gas comprises at most 2.0 vol.-% oxygen, wherein the impregnated refractory support and the impregnated intermediate catalyst are each heated to a temperature of 200 to 800 °C. The process of the invention surprisingly allows for obtaining a catalyst with high selectivity in a cost-efficient manner. The invention also relates to a silver-based epoxidation catalyst obtainable by such a process, and 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 a silver-based epoxidation catalyst obtainable by the above process.

    VERFAHREN ZUR HERSTELLUNG VON BUTADIEN
    7.
    发明授权
    VERFAHREN ZUR HERSTELLUNG VON BUTADIEN 有权
    PROCESS FOR产生丁二烯

    公开(公告)号：EP1708978B1

    公开(公告)日：2010-05-05

    申请号：EP04804421.8

    申请日：2004-12-30

    Applicant: BASF SE

    Inventor： JOHANN, Thorsten ,  SCHINDLER, Götz-Peter ,  BRODHAGEN, Andreas ,  CRONE, Sven ,  BENFER, Regina ,  HILL, Thomas ,  DUDA, Mark

    IPC: C07C5/333 ,  C07C11/167

    CPC classification number: C07C5/333 ,  C07C5/48 ,  C07C11/167

    Abstract: The invention relates to a method for producing butadiene from n-butane, comprising the steps of A) providing an input gas flow a containing n-butane; B) feeding said input gas flow a containing n-butane into at least one first dehydrogenation zone and dehydrogenating n-butane in a non-oxidative catalytic manner, whereby a product gas flow b containing n-butane, 1-butene, 2-butene, butadiene, hydrogen, low-boiling secondary components, and optional steam is obtained; C) feeding the product gas flow b resulting from the non-oxidative catalytic dehydrogenation process and an oxygen-containing gas into at least one second dehydrogenation zone and oxidatively dehydrogenating 1-butene and 2-butene, whereby a product gas flow c containing n-butane, 2-butene, butadiene, hydrogen, low-boiling secondary components, and steam is obtained, said second product gas flow c having a higher butadiene content than product gas flow b; D) eliminating hydrogen, the low-boiling secondary components, and steam, whereby a C4 product gas flow d essentially comprising n-butane, 2-butene, and butadiene is obtained; E) separating the C4 product gas flow d into a recirculation flow e1 essentially comprising n-butane and 2-butene and a flow e2 substantially comprising butadiene by means of extractive distillation, and redirecting flow e1 into the first dehydrogenation zone.

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