12.
    发明专利
    未知

    公开(公告)号:DE59405671D1

    公开(公告)日:1998-05-20

    申请号:DE59405671

    申请日:1994-01-25

    Applicant: BASF AG

    Abstract: Process for regenerating spent multimetal oxide oxidation catalysts from catalytic gas-phase oxidations of lower organic compounds, which catalysts, unspent, contain as base constituents the elements Mo, W, V and Cu in oxide form, by the action of oxidising agents and of solubilising aqueous ammonia containing added acetic acid and/or the ammonium salt thereof and subsequent drying and calcination in which, within the process, the content of the metallic constituents is quantitatively determined and supplemented to the respective original value.

    14.
    发明专利
    未知

    公开(公告)号:DE50201527D1

    公开(公告)日:2004-12-16

    申请号:DE50201527

    申请日:2002-06-24

    Applicant: BASF AG

    Abstract: Polytetrahydrofuran, polytetrahydrofuran copolymers, diesters or monoesters of these polymers are prepared by polymerization of tetrahydrofuran in the presence of at least one telogen and/or comonomer, which is in the form of shaped catalyst bodies or catalyst particles having a volume of the individual shape of the body or particle of at least 0.05 mm 3 , preferably at least 0.2 mm 3 , in particular 1 mm 3 , and has at least one of the features a) and b): a) a pore radius distribution having at least one maximum in the pore radius range from 100 to 5000 Å, b) a pore volume of catalyst pores having radii of 200-3000 Å of greater than 0.05 cm 3 /g and/or a pore volume of pores having radii of 200-5000 Å of greater than 0.075 cm 3 /g and/or a pore volume of pores having radii of >200 Å of greater than 0.1 cm 3 /g.

    17.
    发明专利
    未知

    公开(公告)号:DE4302992A1

    公开(公告)日:1994-08-04

    申请号:DE4302992

    申请日:1993-02-03

    Applicant: BASF AG

    Abstract: Process for regenerating spent multimetal oxide oxidation catalysts from catalytic gas-phase oxidations of lower organic compounds, which catalysts, unspent, contain as base constituents the elements Mo, W, V and Cu in oxide form, by the action of oxidising agents and of solubilising aqueous ammonia containing added acetic acid and/or the ammonium salt thereof and subsequent drying and calcination in which, within the process, the content of the metallic constituents is quantitatively determined and supplemented to the respective original value.

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