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    PROCESS FOR PRODUCING A SILVER-BASED EPOXIDATION CATALYST
    11.
    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 1,4- BUTANDIOL
    16.
    发明授权
    VERFAHREN ZUR HERSTELLUNG VON 1,4- BUTANDIOL 有权
    用于生产1,4丁二醇

    公开(公告)号：EP1515932B1

    公开(公告)日：2010-06-16

    申请号：EP03757050.4

    申请日：2003-06-10

    Applicant: BASF SE

    Inventor： HESSE, Michael ,  SCHLITTER, Stephan ,  BORCHERT, Holger ,  SCHUBERT, Markus ,  RÖSCH, Markus ,  BOTTKE, Nils ,  FISCHER, Rolf-Hartmuth ,  WECK, Alexander ,  WINDECKER, Gunther ,  HEYDRICH, Gunnar

    IPC: C07C29/149 ,  C07C31/20

    CPC classification number: C07C29/149 ,  Y02P20/582 ,  C07C31/207

    Abstract: The invention relates to a method for producing optionally alkyl-substituted 1,4-butanediol by means of two-stage catalytic hydration in the gas phase, comprising the following steps: a) a gas stream of C4-dicarboxylic acid or a derivative thereof is fed into a first reactor and the gas phase is catalytically hydrated so as to obtain a product mainly containing optionally alkyl-substituted y-butyrolactone; b) the obtained product stream is fed into a second reactor and the gas phase is catalytically hydrated so as to obtain optionally alkyl-substituted 1,4-butanediol; c) the desired product is separated from intermediate products, by-products, and an optionally unreacted starting material. A catalyst comprising = 95 percent by weight of CuO and = 5 percent by weight of an oxidic carrier is used in each hydration stage. The product mixture obtained in the first hydration step is introduced into the second hydration stage without further cleaning said product mixture.

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