中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

22 records (took 0.022 seconds)

    11.
    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.

    13.
    发明专利
    未知

    公开(公告)号：BR8003412A

    公开(公告)日：1980-12-30

    申请号：BR8003412

    申请日：1980-05-30

    Applicant: HOECHST AG

    Inventor： WIDMANN P ,  RIEDL J ,  KUHN W

    IPC: B01J23/00 ,  B01J23/72 ,  B01J23/74 ,  B01J27/10 ,  B01J27/122 ,  B01J27/128 ,  C07B61/00 ,  C07C17/00 ,  C07C17/02 ,  C07C17/156 ,  C07C19/045 ,  C07C67/00 ,  C07C17/15

    Abstract: A process for the manufacture of 1,2-dichloroethane from ethylene by reaction with hydrogen chloride and inert gases containing oxygen, and also by reaction with chlorine, is described. The two chlorination reactions are carried out successively at 180 DEG to 360 DEG C. and under a pressure of 0.09 to 1.1 MPa in a common reaction space containing fluidized catalyst particles. A stoichiometric excess of ethylene is employed for the first chlorination reaction. The heat formed in the reaction space is removed by indirect cooling. The process is simple in terms of apparatus and permits a better re-use of the total heat of reaction of the chlorination of ethylene.

    IMPROVING ACTIVITY OF SUPPORTED SILVER CATALYSTS
    18.
    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.

    19.
    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.

    20.
    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.

Patent Agency Ranking