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166 条记录 (耗时 0.024 秒)

    Method for the production of defined mixtures of thf, bdo and gbl by gas phase hydrogenation
    102.
    发明申请
    Method for the production of defined mixtures of thf, bdo and gbl by gas phase hydrogenation 失效

    公开(公告)号：US20070135650A1

    公开(公告)日：2007-06-14

    申请号：US10581074

    申请日：2004-12-04

    申请人： Markus Rosch ,  Rolf Pinkos ,  Michael Hesse ,  Stephan Schlitter ,  Henrik Junicke ,  Olga Schubert ,  Alexander Weck ,  Gunther Windecker

    发明人： Markus Rosch ,  Rolf Pinkos ,  Michael Hesse ,  Stephan Schlitter ,  Henrik Junicke ,  Olga Schubert ,  Alexander Weck ,  Gunther Windecker

    IPC分类号： C07D307/02

    CPC分类号： C07D307/33 ,  C07D307/08

    摘要： The present invention provides a process for variably preparing mixtures of optionally alkyl-substituted BDO, GBL and THF by two-stage hydrogenation in the gas phase of C4 dicarboxylic acids and/or derivatives thereof, which comprises a) in a first step in the gas phase, hydrogenating a gas stream of C4 dicarboxylic acids and/or derivatives thereof over a catalyst at a pressure of from 2 to 100 bar and a temperature of from 200° C. to 300° C. in a first reactor in the presence of a catalyst in the form of shaped catalyst bodies having a volume of less than 20 mm3, said catalyst from 5 to 95% by weight of oxide of copper and from 5 to 95% by weight of an oxide having acidic sites, to give a stream mainly containing of optionally alkyl-substituted GBL and THF, b) removing any succinic anhydride formed by partial condensation, c) converting the products remaining predominantly in the gas phase in the partial condensation, THF, water and GBL, under the same pressure or under a pressure reduced by the pressure drops in the hydrogenation circuit and at a temperature of from 150 to 240° C., in a second reactor over a catalyst which ≦95% by weight of CuO and from 5 to 95% by weight of one or more oxides selected from the group of ZnO, Al2O3, SiO2, TiO2, ZrO2, CeO2, MgO, CaO, SrO, BaO, La2O3 and Mn2O3 to give a stream comprising a mixture of BDO, GBL and THF, d) removing the hydrogen from the products and recycling it into the hydrogenation, e) distillatively separating the products, THF, BDO, GBL and water, if appropriate recycling a GBL-rich stream into the second reactor or if appropriate discharging it, and working up BDO, THF and GBL distillatively, and setting the ratio of the products, THF, GBL and BDO, relative to one another within the range from 10 to 100% by weight of THF, from 0 to 90% by weight of GBL and from 0 to 90% by weight of BDO only by varying the temperatures in the two hydrogenation zones and also if appropriate the GBL recycle stream.

    Method for producing tetrahydrofurane copolymers
    104.
    发明授权
    Method for producing tetrahydrofurane copolymers 失效
    制备四氢呋喃共聚物的方法

    公开(公告)号：US07094933B2

    公开(公告)日：2006-08-22

    申请号：US10524555

    申请日：2003-07-30

    申请人： Martin Haubner ,  Rolf Pinkos ,  Alexander Weck

    发明人： Martin Haubner ,  Rolf Pinkos ,  Alexander Weck

    IPC分类号： C07C43/13 ,  C07C43/11

    CPC分类号： C08G65/20

    摘要： The present invention provides a process for one-stage preparation of polyoxyalkylene glycols by copolymerizing tetrahydrofuran and alpha,omega-diols in the presence of a heteropolyacid and of a hydrocarbon, which comprises distilling water in a mixture with this hydrocarbon out of the copolymerization.

    摘要翻译： 本发明提供了通过在杂多酸和烃的存在下共聚合四氢呋喃和α，ω-二醇来一步法制备聚氧亚烷基二醇的方法，该方法包括在共聚合中将该混合物中的水与该烃进行蒸馏。

    Process for isolating tetrahydrofuran
    109.
    发明授权
    Process for isolating tetrahydrofuran 有权
    四氢呋喃分离方法

    公开(公告)号：US09186599B2

    公开(公告)日：2015-11-17

    申请号：US13235427

    申请日：2011-09-18

    申请人： Maria Guixa Guardia ,  Rolf Pinkos ,  Nadja Pollmer ,  Wolf-Steffen Weissker ,  Hugues Vandenmersch

    发明人： Maria Guixa Guardia ,  Rolf Pinkos ,  Nadja Pollmer ,  Wolf-Steffen Weissker ,  Hugues Vandenmersch

    IPC分类号： C07D307/00 ,  B01D3/14 ,  B01D3/36 ,  C07D307/36

    CPC分类号： B01D3/143 ,  B01D3/36 ,  C07D307/36

    摘要： A process which isolates tetrahydrofuran from a stream of tetrahydrofuran, alkanol and high boilers, by: (a) separating off a first stream of tetrahydrofuran and alkanol as azeotrope in a first distillation stage; (b) feeding part of the first stream into a reactor for esterifying maleic anhydride, giving a second stream of tetrahydrofuran and monoalkyl maleate; (c) separating the second stream into a third stream of monoalkyl maleate and a fourth stream of tetrahydrofuran in a second distillation stage; (d) feeding the fourth stream of tetrahydrofuran from the second distillation stage and the part of the first stream from (a) which is not fed to the reactor into a third distillation stage to obtain a product stream of tetrahydrofuran and a sixth stream of tetrahydrofuran and alkanol; (e) recirculating the sixth stream from the third distillation stage into the first distillation stage or the reactor in (b).

    摘要翻译： 通过以下步骤分离四氢呋喃与四氢呋喃，烷醇和高沸点物流的方法：（a）在第一蒸馏阶段中分离第一流的四氢呋喃和链烷醇作为共沸物; （b）将第一流的一部分进料到用于酯化马来酸酐的反应器中，得到第二股四氢呋喃和马来酸单烷基酯; （c）在第二蒸馏阶段将第二物流分离成马来酸单烷基酯和第四四氢呋喃流; （d）将来自第二蒸馏阶段的第四个四氢呋喃流和来自（a）的未进料到反应器中的第一个物流部分进入第三个蒸馏阶段以获得四氢呋喃的产物流和第六个四氢呋喃流 和链烷醇; （e）将第六流从第三蒸馏段再循环到第一蒸馏阶段或（b）中的反应器中。