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    PROCEDIMIENTO MEJORADO PARA LA PRODUCCION DE POLITETRAHIDROFURANO.
    22.
    发明专利
    PROCEDIMIENTO MEJORADO PARA LA PRODUCCION DE POLITETRAHIDROFURANO. 未知

    公开(公告)号：ES2254714T3

    公开(公告)日：2006-06-16

    申请号：ES02754941

    申请日：2002-07-26

    Applicant: BASF AG

    Inventor： STEINBRENNER ULRICH ,  HAUBNER MARTIN ,  GERSTLAUER ACHIM ,  DOMSCHKE THOMAS ,  SIGWART CHRISTOPH ,  KASHAMMER STEFAN

    IPC: C08G65/20 ,  C08G65/26

    Abstract: Procedimiento para la producción en una etapa de politetrahidrofurano y/o copolímeros de tetrahidrofurano de un peso molecular medio de desde 650 hasta 5.000 Dalton mediante la polimerización de tetrahidrofurano en un catalizador ácido en presencia de al menos un telógeno y/o comonómero, caracterizado porque se añade el telógeno y/o comonómero en al menos dos puntos de adición en diferentes segmentos de un reactor individual de polimerización subdividido en segmentos mediante estructuras internas apropiadas o en una cascada de al menos dos reactores de polimerización, en la que un segmento es un reactor de caldera o tubular, añadiéndose al menos un 5% en peso del telógeno y/o comonómero a partir del segundo punto de adición.

    23.
    发明专利
    未知

    公开(公告)号：DE50201527D1

    公开(公告)日：2004-12-16

    申请号：DE50201527

    申请日：2002-06-24

    Applicant: BASF AG

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

    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 mm 3 , preferably at least 0.2 mm 3 , in particular 1 mm 3 , 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 pores having radii of 200-3000 Å of greater than 0.05 cm 3 /g and/or a pore volume of pores having radii of 200-5000 Å of greater than 0.075 cm 3 /g and/or a pore volume of pores having radii of >200 Å of greater than 0.1 cm 3 /g.

    25.
    发明专利
    未知

    公开(公告)号：ES2175681T3

    公开(公告)日：2002-11-16

    申请号：ES98907952

    申请日：1998-01-17

    Applicant: BASF AG

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

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

    Abstract: A process for preparing halogen-free, reactive polyisobutene having a terminal double bond content of more than 50 mol % and an average molecular weight Mn of 280-10000 dalton by the cationic polymerization in the liquid phase of isobutene or hydrocarbon mixtures comprising isobutene comprises polymerizing at from -30° C. to +40° C. in the presence of a heterogeneous polymerisation catalyst comprising one or more oxides of the elements of transition groups V and VI of the Periodic Table of the Elements or in the presence of a heterogeneous polymerization catalyst comprising one or more oxidic compounds of one or more elements of transition groups V and VI of the Periodic Table of the Elements supported on a non-zeolitic oxidic support material which is not an oxygen-containing zirconium compound, the catalyst not containing a technically effective amount of halogen.

    26.
    发明专利
    未知

    公开(公告)号：DE10112117A1

    公开(公告)日：2002-09-19

    申请号：DE10112117

    申请日：2001-03-14

    Applicant: BASF AG

    Inventor： KUSCHE ANDREAS ,  KLEIN ANDREAS ,  GROLL PETER ,  RIECHERS HARTMUT ,  SIGWART CHRISTOPH ,  HOEHN ARTHUR

    IPC: C07C29/76 ,  C08G65/30

    Abstract: The invention relates to a method for purifying a polyalcohol of general formula (I) wherein R can be the same or different and can represent a substituted or unsubstituted aliphatic hydrocarbon having 1 - 22 C atoms, an aryl or an arylalkyl group having 6 - 22 C atoms or a methylol group. By treating the polyalcohols of general formula (I) with at least one acid and/or basic ion exchanger, the CPR value can be adjusted from 0 to +1.5.

    27.
    发明专利
    未知

    公开(公告)号：DE59803734D1

    公开(公告)日：2002-05-16

    申请号：DE59803734

    申请日：1998-01-17

    Applicant: BASF AG

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

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

    Abstract: A process for preparing halogen-free, reactive polyisobutene having a terminal double bond content of more than 50 mol % and an average molecular weight Mn of 280-10000 dalton by the cationic polymerization in the liquid phase of isobutene or hydrocarbon mixtures comprising isobutene comprises polymerizing at from -30° C. to +40° C. in the presence of a heterogeneous polymerisation catalyst comprising one or more oxides of the elements of transition groups V and VI of the Periodic Table of the Elements or in the presence of a heterogeneous polymerization catalyst comprising one or more oxidic compounds of one or more elements of transition groups V and VI of the Periodic Table of the Elements supported on a non-zeolitic oxidic support material which is not an oxygen-containing zirconium compound, the catalyst not containing a technically effective amount of halogen.

    29.
    发明专利
    未知

    公开(公告)号：DE10032264A1

    公开(公告)日：2002-01-17

    申请号：DE10032264

    申请日：2000-07-03

    Applicant: BASF AG

    Inventor： SIGWART CHRISTOPH ,  DOMSCHKE THOMAS ,  FISCHER ROLF HARTMUTH ,  HAUBNER MARTIN ,  STEIN FRANK

    IPC: C08G65/20 ,  C08G65/30 ,  C07C41/01 ,  C07C41/58 ,  C07C43/10

    Abstract: The invention relates to a method for single-step production of polytetrahydrofurane or tetrahydrofurane copolymers by polymerizing tetrahydrofurane on an acid, heterogeneous catalyst in the presence of at least one telogen and/or comonomer from the group of alpha, omega-diols, water, polytetrahydrofurane having a molecular weight of 200 - 700 Dalton and/or cyclic ether, characterized in that a) the catalyst-free polymerization discharge is divided up into at least one distillation step forming a residue containing the polymerization product and at least one tetrahydrofurane fraction, and the tetrahydrofurane fraction is at least partially recycled in the polymerization, and b) low-molecular polytetrahydrofurane and/or tetrahydrofurane copolymers having an average molecular weight of 200-700 Dalton are separated from the distillation residue of step a) and PTHF and/or THF copolymers having an average molecular weight of 650 - 5000 Dalton are obtained, and c) at least one partial amount of the separated low-molecular polytetrahydrofurane and/or tetrahydrofurane copolymer having an average molecular weight of 200 700 Dalton is recyled in the polymerization.

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