122.
    发明专利
    未知

    公开(公告)号:DE3305805A1

    公开(公告)日:1984-08-23

    申请号:DE3305805

    申请日:1983-02-19

    Applicant: BASF AG

    Abstract: The subject invention relates to a process for regenerating silver-containing carrier catalysts used in the preparation of ethylene oxide which comprises treating a deactivated catalyst with a solution comprising a potassium, rubidium, or cesium compound and a reducing agent. The subject process provides improved catalyst regeneration.

    123.
    发明专利
    未知

    公开(公告)号:DE3304479A1

    公开(公告)日:1984-08-23

    申请号:DE3304479

    申请日:1983-02-10

    Applicant: BASF AG

    Abstract: C2-C4-olefins are prepared by catalytic conversion of methanol and/or dimethyl ether in the presence of a zeolite catalyst at elevated temperatures, by a process in which the catalyst used is a pure borosilicate zeolite which has been tableted or extruded without a binder and treated with hydrofluoric acid and hydrochloric acid. The treatment of the catalyst with hydrofluoric acid is carried out using 0.001-1N HF, and that with hydrochloric acid is carried out using 3-25% strength acid. The time-on-stream of the catalyst is improved.

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