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    3.
    发明专利
    未知

    公开(公告)号：AT208786T

    公开(公告)日：2001-11-15

    申请号：AT96924832

    申请日：1996-07-01

    Applicant: BASF AG

    Inventor： FISCHER DAVID ,  LANGHAUSER FRANZ ,  STUERMER RAINER ,  KERTH JUERGEN ,  SCHWEIER GUENTHER ,  BRINTZINGER HANS-HERBERT ,  SCHMIDT KATRIN

    IPC: C07F17/00

    Abstract: PCT No. PCT/EP96/02869 Sec. 371 Date Jan. 8, 1998 Sec. 102(e) Date Jan. 8, 1998 PCT Filed Jan. 7, 1996 PCT Pub. No. WO97/03081 PCT Pub. Date Jan. 30, 1997In a process for converting the achiral meso form or the racemate of an ansa-metallocene complex or a mixture thereof into one of its enantiomers, the conversion is carried out photochemically in the presence of an enantiomerically pure auxiliary reagent.

    5.
    发明专利
    未知

    公开(公告)号：BR9813430A

    公开(公告)日：2000-10-17

    申请号：BR9813430

    申请日：1998-11-26

    Applicant: BASF AG

    Inventor： BAUER PETER ,  LANGE ARMIN ,  KARER RAINER ,  ROSENDORFER PHILIPP ,  HECKER MANFRED ,  SCHWEIER GUENTHER ,  MICKLITZ WOLFGANG ,  EVERTZ KASPAR ,  FEINDT HANS-JACOB

    IPC: C08J5/18 ,  C08F2/34 ,  C08F4/02 ,  C08F4/24 ,  C08F4/69 ,  C08F10/02 ,  C08F210/02

    Abstract: A continuous vapor-phase fluidized-bed process for the preparation of ethylene homopolymers and copolymers having a density of from 0.87 to 0.97 g/cm in which ethylene or mixtures of ethylene and C3-C8 a-monoolefins are (co)polymerized in the presence of a supported chromium catalyst in the polymerization zone of a vapor-phase fluidized-bed reactor under pressures ranging from 1 to 100 bar and at temperatures ranging from 30° to 125° C. in the vapor phase in an agitated bed of bulk material comprising particulate polymer, the resultant heat of polymerization is removed by cooling the recirculated reactor gas and the resulting (co)polymer is removed from the vapor-phase fluidized-bed reactor, wherein, for the preparation of a (co)polymer of a specific density d, the (co)polymerization is carried out at a temperature which is in a range restricted by an upper envelope defined by equation Iand a lower envelope defined by equation IIin which the variables have the following meanings:TH is the highest reaction temperature in ° C.;TL is the lowest reaction temperature in ° C.;d' is the numerical value of the density d of the (co)polymer to be synthesized.

    8.
    发明专利
    未知

    公开(公告)号：NO960089L

    公开(公告)日：1996-01-09

    申请号：NO960089

    申请日：1996-01-09

    Applicant: BASF AG

    Inventor： ROHDE WOLFGANG ,  SAIVE ROLAND ,  GOERTZ HANS-HELMUT ,  SCHWEIER GUENTHER

    IPC: C08F4/02 ,  C08F4/639 ,  C08F4/6392 ,  C08F4/69 ,  C08F10/00

    Abstract: Polyalk-1-enes are prepared by polymerization of alk-1-enes with the aid of the compound bis(cyclopentadienyl)-chromium(II)in which the cyclopentadienyl rings may carry inert organic radicals, said compound being adsorbed on an inorganic oxide carrier, by a process in which the polymerization is carried out in the presence of an organometallic compound of a metal of main groups I to III or of a metal hydride, in particular of n-butyl-lithium.

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