13.
    发明专利
    未知

    公开(公告)号:DE4433606A1

    公开(公告)日:1996-03-28

    申请号:DE4433606

    申请日:1994-09-21

    Applicant: BASF AG

    Abstract: A method is disclosed of producing polytetrahydrofurane or polytetrahydrofurane monoesters of C1-C10 monocarboxylic acids by polymerisation of tetrahydrofurane on a heterogenous catalyst in the presence of one of the following telogens: water, 1.4-butane diol, polytetrahydrofurane with a molecular weight of 200-700 Da, a C1-C10 monocarboxylic acid, or mixtures of these telogens. The catalyst used is a carrier catalyst which contains a catalytically active quantity of an oxygen-containing tungsten or molybdenum compound or mixtures of such compounds on an oxide carrier material and has undergone calcination at temperatures of 500-1000 DEG C after the precursors of the oxygen-containing molybdenum and/or tungsten compounds have been deposited on the carrier material precursor.

    18.
    发明专利
    未知

    公开(公告)号:DE19734176A1

    公开(公告)日:1999-02-11

    申请号:DE19734176

    申请日:1997-08-07

    Applicant: BASF AG

    Abstract: A process is disclosed for preparing halogen-free, reactive polyisobutylene with a content of terminal double bonds of more than 50 % by moles and an average molecular weight Mn of 500 to 5000 daltons by cationic polymerisation of isobutylene or isobutylene-containing hydrocarbon mixtures in the liquid phase. Polymerisation is carried out at a temperature of between -40 and +10 DEG C in the presence of a molybdate or wolframate heteropolyacid.

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