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22 条记录 (耗时 0.025 秒)

    Method for the single-step production of polytetrahydrofuran and tetrahydrofuran copolymers
    1.
    发明授权
    Method for the single-step production of polytetrahydrofuran and tetrahydrofuran copolymers 失效
    单步生产聚四氢呋喃和四氢呋喃共聚物的方法

    公开(公告)号：US06716937B2

    公开(公告)日：2004-04-06

    申请号：US10312851

    申请日：2003-01-02

    申请人： Gerd Bohner ,  Thomas Domschke ,  Rolf-Hartmuth Fischer ,  Martin Haubner ,  Christoph Sigwart ,  Ulrich Steinbrenner ,  Christian Tragut

    发明人： Gerd Bohner ,  Thomas Domschke ,  Rolf-Hartmuth Fischer ,  Martin Haubner ,  Christoph Sigwart ,  Ulrich Steinbrenner ,  Christian Tragut

    IPC分类号： C08F244

    CPC分类号： C08G65/30 ,  C08G65/20

    摘要： A process for the single-stage preparation of polytetrahydrofuran and/or tetrahydrofuran copolymers having a mean molecular weight of from 650 to 5000 dalton by polymerization of tetrahydrofuran over a heterogeneous acid catalyst in the presence of at least one telogen and/or comonomer selected from the group consisting of alpha,omega-diols, water, polytetrahydrofuran having a molecular weight of from 200 to 700 dalton and cyclic ethers comprises a) separating off the catalyst and/or downstream products of the catalyst suspended and/or dissolved in the output from the polymerization, b) fractionating the resulting catalyst-free output from the polymerization in at least one distillation step to give a distillation residue comprising the polymerization product and at least one tetrahydrofuran fraction and returning at least part of the tetrahydrofuran fraction to the polymerization and c) separating low molecular weight polytetrahydrofuran and/or tetrahydrofuran copolymers having a mean molecular weight of from 200 to 700 dalton from the distillation residue from work-up step b) and isolating polytetrahydrofuran and/or tetrahydrofuran copolymers having a mean molecular weight of from 650 to 5000 dalton.

    摘要翻译： 一种通过在多相酸催化剂的存在下，在四氢呋喃和/或共聚单体的存在下，通过四氢呋喃聚合，单分级制备平均分子量为650-5000道尔顿的聚四氢呋喃和/或四氢呋喃共聚物的方法，该共聚单体选自 由α，ω-二醇，水，分子量为200至700道尔顿的聚四氢呋喃和环醚组成的组包括：a）将催化剂和/或催化剂的下游产物分离出悬浮和/或溶解在聚合物的输出中 b）在至少一个蒸馏步骤中将所得无催化剂的产物从聚合中分馏，得到包含聚合产物和至少一种四氢呋喃馏分的蒸馏残余物，并将至少部分四氢呋喃馏分返回到聚合反应中， 分子量的四氢呋喃和/或四氢呋喃共聚物 来自后处理步骤b）的蒸馏残余物的200至700道尔顿的颗粒重量，并分离平均分子量为650-5000道尔顿的聚四氢呋喃和/或四氢呋喃共聚物。

    Method for producing tetrahydrofuran copolymers
    9.
    发明授权
    Method for producing tetrahydrofuran copolymers 失效
    生产四氢呋喃共聚物的方法

    公开(公告)号：US07361793B2

    公开(公告)日：2008-04-22

    申请号：US10551137

    申请日：2004-03-30

    申请人： Martin Haubner ,  Rolf Pinkos

    发明人： Martin Haubner ,  Rolf Pinkos

    IPC分类号： C07C43/00

    CPC分类号： C08G65/2666 ,  C08G65/20

    摘要： The present invention relates to a process for the single-stage preparation of polyoxyalkylene glycols by copolymerization of THF and alpha, omega-diols in the presence of a heteropolyacid, wherein the content of organically bound nitrogen in the alpha, omega-diol is less than 15 ppm.

    摘要翻译： 本发明涉及通过THF和α，ω-二醇在杂多酸的存在下共聚制备聚氧亚烷基二醇的方法，其中α，ω-二醇中的有机结合的氮的含量小于 15 ppm。

    Method for obtaining oligomers of polytetrahydofurane or tetrahydrofurane
    10.
    发明申请
    Method for obtaining oligomers of polytetrahydofurane or tetrahydrofurane 有权
    获得聚四氢呋喃或四氢呋喃的低聚物的方法

    公开(公告)号：US20060266635A1

    公开(公告)日：2006-11-30

    申请号：US10563421

    申请日：2004-06-19

    申请人： Volkmar Menger ,  Michael Schwarztrauber ,  Martin Haubner ,  Klaus-Peter Pfaff

    发明人： Volkmar Menger ,  Michael Schwarztrauber ,  Martin Haubner ,  Klaus-Peter Pfaff

    IPC分类号： B01D3/00

    CPC分类号： C08G65/20 ,  C08G65/30 ,  C08G65/3311 ,  Y10S203/24

    摘要： A process for obtaining oligomers of polytetrahydrofuran or of tetrahydrofuran copolymers from a methanolic crude product which contains polytetrahydrofuran or tetrahydrofuran copolymers and is obtained in the transesterification of the mono- and/or diesters of polytetrahydrofuran or tetrahydrofuran copolymers with methanol, which comprises a) removing the majority of the methanol from the crude product in a first distillation stage, b) separating the resulting bottom product by distillation into a top fraction comprising the oligomers of polytetrahydrofuran or of tetrahydrofuran copolymers, and polytetrahydrofuran or tetrahydrofuran copolymer, c) condensing the oligomers of polytetrahydrofuran or of tetrahydrofuran copolymers out of the top fraction from stage b).

    摘要翻译： 从含有四氢呋喃或四氢呋喃共聚物的甲醇粗产物中获得聚四氢呋喃或四氢呋喃共聚物的低聚物的方法，是在聚四氢呋喃或四氢呋喃共聚物与甲醇的单酯和/或二酯的酯交换反应中获得的，该方法包括：a） 大部分来自粗产物的甲醇在第一蒸馏阶段，b）通过蒸馏将所得底部产物分离成包含聚四氢呋喃或四氢呋喃共聚物的低聚物的顶级馏分和聚四氢呋喃或四氢呋喃共聚物，c）将聚四氢呋喃的低聚物 或来自阶段b）的最高级分的四氢呋喃共聚物。