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    1.
    发明专利
    未知

    公开(公告)号：BR7602685A

    公开(公告)日：1976-11-09

    申请号：BR7602685

    申请日：1976-04-30

    Applicant: HOECHST AG

    Inventor： REBSDAT S ,  MAYER S ,  ALFRANSEDER J

    IPC: B01J23/66 ,  B01J23/96 ,  B01J38/48 ,  B01J38/52 ,  C07B61/00 ,  C07D301/10 ,  C07D303/02 ,  C07D301/04

    Abstract: The efficiency of silver carrier catalysts having reduced activity for the manufacture of ethylene oxide by reacting ethylene with oxygen or air is improved by impregnating the used catalyst with a solution containing cesium and/or rubidium compounds, an aliphatic alcohol and at most 10% by weight of water. After impregnation the alcohol and optionally the water are evaporated. The cesium and/or rubidium content of the impregnating solution and the number of impregnations are adjusted to obtain on the carrier a cesium and/or rubidium concentration of from 1 to 1,000 ppm.

    4.
    发明专利
    未知

    公开(公告)号：SE434804B

    公开(公告)日：1984-08-20

    申请号：SE7712150

    申请日：1977-10-27

    Applicant: HOECHST AG

    Inventor： REBSDAT S ,  MAYER S ,  ALFRANSEDER J ,  RIEDL J

    IPC: B01J23/66 ,  B01J23/96 ,  B01J31/40 ,  B01J38/48 ,  C07B61/00 ,  C07D301/10 ,  C07D303/04 ,  B01J23/54

    Abstract: The activity of supported silver catalysts for the direct oxidation of ethylene to ethylene oxide with molecular oxygen or air is improved by applying to the catalyst from 1 to 1,000 ppm, preferably 20 to 500 ppm, of cesium and/or rubidium in two or more than two steps and using the catalyst after each impregnation step again for the production of ethylene oxide by direct oxidation of ethylene with molecular oxygen or air.

    IMPROVING ACTIVITY OF SUPPORTED SILVER CATALYSTS
    7.
    发明专利
    IMPROVING ACTIVITY OF SUPPORTED SILVER CATALYSTS 未知

    公开(公告)号：AU511144B2

    公开(公告)日：1980-07-31

    申请号：AU2789877

    申请日：1977-08-15

    Applicant: HOECHST AG

    Inventor： REBSDAT S ,  MAYER S ,  ALFRANSEDER J ,  RIEDL J

    IPC: B01J23/66 ,  B01J23/96 ,  B01J38/48 ,  B01J38/50 ,  C07B61/00 ,  C07D301/10 ,  B01J23/54 ,  B01J37/02

    Abstract: The activity of supported silver catalysts used up in the direct oxidation of ethylene with molecular oxygen or air is improved by impregnating the catalyst arranged in a fixed bed with a solution of a caesium and/or rubidium compound in an inert organic solvent, optionally together with up to 40% by weight of water, calculated on the total liquid, as dissolving intermediary, so as to produce a concentration gradient of from 0.3 to 20 parts of caesium and/or rubidium per 1 million parts of catalyst and per meter of fixed bed, counter to the direction of flow of the gas to be reacted. In this manner the activity of the catalyst is considerably improved which results in an increased selectivity of the oxidation of ethylene to ethylene oxide.

    8.
    发明专利
    未知

    公开(公告)号：BR7705359A

    公开(公告)日：1978-06-06

    申请号：BR7705359

    申请日：1977-08-12

    Applicant: HOECHST AG

    Inventor： ALFRANSEDER J ,  MAYER S ,  REBSDAT S ,  RIEDL J

    IPC: B01J23/66 ,  B01J23/96 ,  B01J38/48 ,  B01J38/50 ,  C07B61/00 ,  C07D301/10 ,  B01J23/50

    Abstract: The activity of supported silver catalysts used up in the direct oxidation of ethylene with molecular oxygen or air is improved by impregnating the catalyst arranged in a fixed bed with a solution of a caesium and/or rubidium compound in an inert organic solvent, optionally together with up to 40% by weight of water, calculated on the total liquid, as dissolving intermediary, so as to produce a concentration gradient of from 0.3 to 20 parts of caesium and/or rubidium per 1 million parts of catalyst and per meter of fixed bed, counter to the direction of flow of the gas to be reacted. In this manner the activity of the catalyst is considerably improved which results in an increased selectivity of the oxidation of ethylene to ethylene oxide.

    9.
    发明专利
    未知

    公开(公告)号：SE7712150L

    公开(公告)日：1978-04-30

    申请号：SE7712150

    申请日：1977-10-27

    Applicant: HOECHST AG

    Inventor： REBSDAT S ,  MAYER S ,  ALFRANSEDER J ,  RIEDL J

    IPC: B01J23/66 ,  B01J23/96 ,  B01J31/40 ,  B01J38/48 ,  C07B61/00 ,  C07D301/10 ,  C07D303/04 ,  B01J23/54 ,  C07D

    Abstract: The activity of supported silver catalysts for the direct oxidation of ethylene to ethylene oxide with molecular oxygen or air is improved by applying to the catalyst from 1 to 1,000 ppm, preferably 20 to 500 ppm, of cesium and/or rubidium in two or more than two steps and using the catalyst after each impregnation step again for the production of ethylene oxide by direct oxidation of ethylene with molecular oxygen or air.

    10.
    发明专利
    未知

    公开(公告)号：SE7709149L

    公开(公告)日：1978-02-15

    申请号：SE7709149

    申请日：1977-08-12

    Applicant: HOECHST AG

    Inventor： REBSDAT S ,  MAYER S ,  ALFRANSEDER J ,  RIEDL J

    IPC: B01J23/66 ,  B01J23/96 ,  B01J38/48 ,  B01J38/50 ,  C07B61/00 ,  C07D301/10 ,  B01J23/50 ,  C07D ,  C07D303/04

    Abstract: The activity of supported silver catalysts used up in the direct oxidation of ethylene with molecular oxygen or air is improved by impregnating the catalyst arranged in a fixed bed with a solution of a caesium and/or rubidium compound in an inert organic solvent, optionally together with up to 40% by weight of water, calculated on the total liquid, as dissolving intermediary, so as to produce a concentration gradient of from 0.3 to 20 parts of caesium and/or rubidium per 1 million parts of catalyst and per meter of fixed bed, counter to the direction of flow of the gas to be reacted. In this manner the activity of the catalyst is considerably improved which results in an increased selectivity of the oxidation of ethylene to ethylene oxide.

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