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    92.
    发明专利
    未知

    公开(公告)号：DE59709929D1

    公开(公告)日：2003-05-28

    申请号：DE59709929

    申请日：1997-11-18

    Applicant: BASF AG

    Inventor： ELLER KARSTEN ,  SIGWART CHRISTOPH ,  BECKER RAINER ,  PLITZKO KLAUS-DIETER ,  FISCHER ROLF ,  STEIN FRANK ,  MUELLER ULRICH ,  HESSE MICHAEL

    IPC: B01J23/24 ,  C08G65/10 ,  C08G65/20 ,  C08G65/26 ,  C08G65/28

    Abstract: Polytetrahydrofuran, tetrahydrofuran copolymers, diesters or monoesters of these polymers are prepared by polymerizing tetrahydrofuran in the presence of at least one telogen and/or comonomer on a heterogeneous carrier catalyst which contains on an oxidic carrier material as active mass a catalytically active amount of at least one oxygenous molybdenum and/or tungsten compound and, when the precursor compounds of the active mass have been applied to the carrier material precursor, has been calcined at temperatures of between 500° C. and 1000° C. The catalyst used contains a promotor which comprises at least one element or a compound of an element of the 2nd, 3rd including the lanthanides, 5th, 6th, 7th, 8th or 14th group of the periodic system of elements.

    94.
    发明专利
    未知

    公开(公告)号：DE10130782A1

    公开(公告)日：2003-01-02

    申请号：DE10130782

    申请日：2001-06-26

    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: The invention relates to a catalyst for the production of polytetrahydrofuran, polytetrahydrofuran copolymers, diesters or monoesters of said polymers by polymerizing tetrahydrofuran in the presence of at least one telogen and/or comonomer, wherein said catalyst is present in the form of catalyst molded bodies or catalyst particles with a volume of the individual molded bodies or particles of at least 0.05mm , preferably at least 0.2mm , more particularly 1mm . Said catalyst has at least one of characteristics a) and b): a) pore radius distribution with at least a maximum pore distribution in the range of 100-5000 A pore radius, b) pore volume of catalyst pores with radii of 200 - 3000 A bigger than 0.05cm /g and/or radii of 200 - 5000 A bigger than 0.075cm /g and/or a radius of > 200 A bigger than 0.1cm /g.

    97.
    发明专利
    未知

    公开(公告)号：DE10032266A1

    公开(公告)日：2002-01-17

    申请号：DE10032266

    申请日：2000-07-03

    Applicant: BASF AG

    Inventor： BOHNER GERD ,  DOMSCHKE THOMAS ,  FISCHER ROLF HARTMUTH ,  HAUBNER MARTIN ,  SIGWART CHRISTOPH ,  STEINBRENNER ULRICH ,  TRAGUT CHRISTIAN

    IPC: C08G65/20 ,  C08G65/30 ,  C08G65/32 ,  C07C41/01 ,  C07C43/10 ,  C07C41/58

    Abstract: The invention relates to a method for the single-step production of polytetrahydrofuran and/or tetrahydrofuran copolymers having an average molecular weight of 650 to 5000 daltons by polymerizing tetrahydrofuran on an acidic heterogeneous catalyst in the presence of at least one telogen and/or comonomer of the group of the alpha, omega diols, water, polytetrahydrofuran having a molecular weight of 200 to 700 daltons and/or of the cyclic ethers, characterized by a) removing the suspended and/or dissolved catalyst components and/or secondary products of the catalyst contained in the polymerization product, b) carrying out a separation in at least one distillation step from the resulting catalyst-free polymerization product to give a distillation product that contains the polymerization product and at least one tetrahydrofuran fraction, and returning at least part of the tetrahydrofuran fraction to the polymerization, and c) removing from the distillation residue of processing step b) the low-molecular polytetrahydrofuran and/or tetrahydrofuran copolymers that have an average molecular weight of 200 to 700 daltons, and obtaining a polytetrahydrofuran and/or tetrahydrofuran copolymer that has an average molecular weight of 650 to 5000 daltons.

    Process for preparing polyoxytetramethylene glycol
    100.
    发明专利
    Process for preparing polyoxytetramethylene glycol 未知

    公开(公告)号：CZ288205B6

    公开(公告)日：2001-05-16

    申请号：CZ20002850

    申请日：2000-08-03

    Applicant: BASF AG

    Inventor： SIGWART CHRISTOPH ,  FISCHER ROLF ,  ELLER KARSTEN ,  BECKER RAINER ,  PLITZKO KLAUS-DIETER ,  HEILEN GERD

    IPC: C08G18/48 ,  C08G18/67 ,  C08G63/66 ,  C08G65/10 ,  C08G65/20 ,  C08G65/26 ,  C08G65/28 ,  C08G69/40

    Abstract: In the present invention there is disclosed a process for preparing polyoxytetramethylene glycol, which preparation process comprises reaction of tetrahydrofuran and but-2-ine-1,4-diol copolymer in the presence of hydrogen at a temperature ranging from 20 degC to 300 degC and at pressure within the range of 0.1 MPa to 30 MPa on a hydrogenation catalyst, whereby this tetrahydrofuran and but-2-ine-1,4-diol copolymer is prepared by polymerization of tetrahydrofuran on a heterogeneous acidic polymerization catalyst having acidity of acid centers pKia less than +2 in concentration of at least 0.005 mmol per gram of the catalyst, in the presence of but-2-ine-1,4-diol. For this preparation process a variety of polymerization catalysts can be used. For hydrogenation it is preferred to use a hydrogenation catalyst containing at least one element being selected from the groups Ib, VIIb or VIIIb of the Periodic System of Elements, particularly a heterogeneous hydrogenation catalyst.

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