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    3.
    发明专利
    未知

    公开(公告)号：DE19704482A1

    公开(公告)日：1998-08-13

    申请号：DE19704482

    申请日：1997-02-06

    Applicant: BASF AG

    Inventor： SIGWART CHRISTOPH DR ,  NARBESHUBER THOMAS DR ,  ELLER KARSTEN DR ,  BARL MANFRED DR ,  FISCHER ROLF DR ,  GEHRER EUGEN DR

    IPC: C08F4/02 ,  C08F4/20 ,  C08F4/24 ,  C08F10/08 ,  C08F10/10 ,  C08F110/10

    Abstract: The invention relates to a method for producing halogen-free, reactive polyisobutene with a terminal double-bond content of over 50 mol % and an average molecular weight of 2,800 - 10,000 Dalton by cationic polymerization of isobutene or isobutene-containing hydrocarbon mixtures in a liquid phase, wherein polmerization is carried out at a temperature of -30 DEG C to +40 DEG C in the presence of a heterogeneous polymerization catalyst from one or several oxides of the elements of the 5th and 6th subgroup of the periodic table of elements or in the presence of a heterogeneous polymerization catalyst containing one or more oxidic compounds of one or more elements of the 5th and 6th subgroup of the periodic table of elements on an oxygen-containing zircon compound of various non-zeolitic oxidic supporting material, wherein said catalyst contains no technically active quantities of halogen.

    CATALYST AND METHOD FOR THE PRODUCTION OF POLYTETRAHYDROFURAN
    5.
    发明专利
    CATALYST AND METHOD FOR THE PRODUCTION OF POLYTETRAHYDROFURAN 未知

    公开(公告)号：MY137357A

    公开(公告)日：2009-01-30

    申请号：MYPI20021995

    申请日：2002-05-30

    Applicant: BASF AG

    Inventor： SCHLITTER STEPHAN DR ,  SIGWART CHRISTOPH DR ,  DORFLINGER WALTER ,  HESSE MICHAEL DR ,  FISCHER ROLF-HARTMUTH DR

    IPC: B01J21/16 ,  B01J35/10 ,  C08G65/20 ,  C08G65/26

    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 mm3, PREFERABLY AT LEAST 0.2 mm3, IN PARTICULAR 1 mm3, 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 PRES HAVING RADII OF 200 - 3000 Å OF GREATER THAN 0.05 cm3/g AND/OR A PORE VOLUME OF PORES HAVING RADII OF 200 - 5000 Å OF GREATER THAN 0.075 cm3/g AND/OR A PORE VOLUME OF PORES HAVING RADII OF > 200 Å OF GREATER THAN 0.1 cm3/g.

    Process for the preparation of polytetrahydrofuran
    7.
    发明专利
    Process for the preparation of polytetrahydrofuran 未知

    公开(公告)号：DE4316137A1

    公开(公告)日：1994-11-17

    申请号：DE4316137

    申请日：1993-05-14

    Applicant: BASF AG

    Inventor： BECKER RAINER DR ,  SIGWART CHRISTOPH DR ,  PALM CHRISTOF DR ,  FRANZISCHKA WOLFGANG DR

    IPC: C08G18/28 ,  C08G18/48 ,  C08G65/20 ,  C08G65/26

    Abstract: A process for the preparation of polytetrahydrofuran or polytetrahydrofuran monoesters with C1- to C20-monocarboxylic acids or polytetrahydrofuran monoethers with monohydric C1- to C20-alcohols having a mean molecular weight of from 250 to 15,000 daltons by cationic polymerisation of tetrahydrofuran in the presence of a telogen, characterised in that tetrahydrofuran is polymerised in the presence of water, 1,4-butanediol and/or polytetrahydrofuran having a mean molecular weight of from 200 to 700 daltons and/or in the presence of a C1- to C20-monocarboxylic acid and/or a monohydric C1- to C20-alcohol with the aid of a catalytically effective amount of a bleaching earth catalyst.

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