PREPARATION OF HALOGEN-FREE, REACTIVE POLYISOBUTENE

    公开(公告)号:CA2225500A1

    公开(公告)日:1997-02-20

    申请号:CA2225500

    申请日:1996-08-05

    Applicant: BASF AG

    Abstract: Described is a method of producing reactive halogen-free polyisobutene having more than 50 mole % of terminal double bonds and a mean molecular weight Mn of 500 to 5000 Daltons by the cationic polymerization of isobutene or isobutenecontaining hydrocarbon mixtures in the liquid phase, the polymerization being carried out at a temperature of -30 to +40 ~C over a heterogeneous polymerization catalyst which includes at least one element which acts as promoter selected from the Ist, IInd, IIIrd, IVth, Vth, VIIth or VIIIth subgroup of the periodic table of the elements or from the IInd, IIIrd, IVth, Vth or VIth main group of the periodic table, or several such elements, each in the form of an oxygen-containing compound, plus zirconium in the form of an oxygen-containing compound, the catalyst not containing technically significant amounts of halogens.

    100.
    发明专利
    未知

    公开(公告)号:DE102004045879A1

    公开(公告)日:2006-04-06

    申请号:DE102004045879

    申请日:2004-09-20

    Applicant: BASF AG

    Abstract: Processes suitable for purifying aromatic-containing feed streams, and processes using such purified streams are described, wherein the purification processes comprise: (a) providing a process feedstream comprising an aromatic component; and (b) bringing the process feedstream into contact with a first zeolite and a second zeolite; wherein the first zeolite has a mean pore size of 0.3 to 0.5 nm, and wherein the second zeolite has a mean pore size of 0.6 to 0.8 nm.

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