5.
    发明专利
    未知

    公开(公告)号:DE50303819D1

    公开(公告)日:2006-07-27

    申请号:DE50303819

    申请日:2003-02-06

    Applicant: BASF AG

    Abstract: The present invention relates to a process for reacting epoxides with an initiator compound in the presence of a double metal cyanide compound as a catalyst, said process having a shortened induction period, and the double metal cyanide compound being activated by adding the epoxide to a mixture of double metal cyanide compound and initiator compound at an internal reactor pressure of less than 1 bar, and also to the polyethers themselves obtainable by such a process.

    7.
    发明专利
    未知

    公开(公告)号:DE50103101D1

    公开(公告)日:2004-09-09

    申请号:DE50103101

    申请日:2001-02-20

    Applicant: BASF AG

    Abstract: A process for preparing polyether polyols includes a precipitation step, a recrystallization step, and a reaction step. In the precipitation step, a multimetal cyanide compound is precipitated by reaction of a metal salt with a cyanometalate compound. In the recrystallization step, the multimetal cyanide compound precipitated above is recrystallized by adding further metal salt and/or further cyanometalate compound. The recrystallization forms a multimetal cyanide catalyst compound. In the reaction step, an initiator and one or more alkylene oxide are reacted in the presence of the multimetal cyanide catalyst compound.

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