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    Continuous preparation of alkyl esters of (meth)acrylic acid
    1.
    发明授权
    Continuous preparation of alkyl esters of (meth)acrylic acid 失效
    连续制备（甲基）丙烯酸的烷基酯

    公开(公告)号：US5883288A

    公开(公告)日：1999-03-16

    申请号：US791052

    申请日：1997-01-28

    申请人： Gabriele Iffland ,  Albrecht Dams ,  Alexander Weck ,  Heinrich Aichinger ,  Holger Herbst ,  Gerhard Nestler ,  Herbert Exner ,  Willi Schmidt ,  Matthias Geisendorfer ,  Toni Dockner

    发明人： Gabriele Iffland ,  Albrecht Dams ,  Alexander Weck ,  Heinrich Aichinger ,  Holger Herbst ,  Gerhard Nestler ,  Herbert Exner ,  Willi Schmidt ,  Matthias Geisendorfer ,  Toni Dockner

    IPC分类号： B01J27/02 ,  B01J31/02 ,  C07B61/00 ,  C07C67/08 ,  C07C67/54 ,  C07C69/54 ,  C07C69/52

    CPC分类号： C07C67/08

    摘要： In the process for the continuous preparation of alkyl esters of (meth)acrylic acid by reacting (meth)acrylic acid with monohydric alkanols having from 1 to 8 carbon atoms in the presence of an acid esterification catalyst in a reaction zone, there is discharged from the reaction zone a product mixture which comprises the alkyl (meth)acrylate formed, the catalyst and the by-products formed during the course of the esterification having boiling points higher than that of the alkyl (meth)acrylate, and from which the alkyl (meth)acrylate is separated by distillation in a separation zone. The product mixture discharged from the reaction zone is fed to a rectification unit (I), in this unit the product mixture discharged is separated by rectification into at least one product (I) comprising the alkyl ester of (meth)acrylic acid and a product (II) comprising the catalyst, the product (I) is fed to a further rectification unit (II) and in this the alkyl ester of (meth)acrylic acid is separated off by rectification.

    摘要翻译： 在反应区酸性酯化催化剂存在下，使（甲基）丙烯酸与具有1〜8个碳原子的一元链烷醇反应连续制备（甲基）丙烯酸烷基酯的方法中， 所述反应区包含形成的（甲基）丙烯酸烷基酯，在酯化过程中形成的催化剂和副产物的沸点高于（甲基）丙烯酸烷基酯的产物混合物，并且烷基（ 甲基）丙烯酸酯在分离区中蒸馏分离。 将从反应区排出的产物混合物供给到精馏单元（I），在该单元中，排出的产物混合物通过精馏分离成至少一种包含（甲基）丙烯酸的烷基酯的产物（I）和产物 （II），将产物（I）进料到另一精馏单元（II）中，通过精馏分离（甲基）丙烯酸的烷基酯。

    Continuous preparation of alkyl esters of (meth) acrylic acid
    2.
    发明授权
    Continuous preparation of alkyl esters of (meth) acrylic acid 失效
    连续制备（甲基）丙烯酸的烷基酯

    公开(公告)号：US5945560A

    公开(公告)日：1999-08-31

    申请号：US791054

    申请日：1997-01-28

    申请人： Gabriele Iffland ,  Albrecht Dams ,  Alexander Weck ,  Heinrich Aichinger ,  Holger Herbst ,  Gerhard Nestler ,  Herbert Exner

    发明人： Gabriele Iffland ,  Albrecht Dams ,  Alexander Weck ,  Heinrich Aichinger ,  Holger Herbst ,  Gerhard Nestler ,  Herbert Exner

    IPC分类号： B01J27/02 ,  B01J31/02 ,  C07B41/12 ,  C07B61/00 ,  C07C67/08 ,  C07C67/54 ,  C07C69/54 ,  C07C69/52

    CPC分类号： C07C67/08 ,  C07C67/54

    摘要： In a process and an apparatus for the continuous preparation of alkyl esters of (meth)acrylic acid by reacting (meth)acrylic acid with alkanols having from 1 to 5 carbon atoms in a homogeneous, liquid, solvent-free phase at elevated temperature and in the presence of an acid esterification catalyst, in which the (meth)acrylic acid, the alkanol and the catalyst are fed to a reaction zone, the water formed is removed by rectification during a residence time as constituent of a mixture comprising alkanol in a rectification unit superposed on the reaction zone, the distillate thus obtained is separated into an organic phase comprising alkanol and an aqueous phase comprising water, the organic phase is returned to the rectification unit, the reaction mixture is discharged from the reaction zone and conveyed into a distillative separation zone comprising further rectification units and in the latter the alkyl (meth)acrylate formed is separated off.

    摘要翻译： 在（甲基）丙烯酸的烷基酯连续制备方法和装置中，通过使（甲基）丙烯酸与具有1至5个碳原子的链烷醇在高温和均相，液体，无溶剂相中 将（甲基）丙烯酸，链烷醇和催化剂进料到反应区中的酸酯化催化剂的存在，在停留时间内通过精馏除去形成的水，作为在精馏中的链烷醇的混合物的组分 单元重叠在反应区上，将由此获得的馏出物分离成包含链烷醇和含水水相的有机相，将有机相返回至精馏单元，将反应混合物从反应区排出并输送至蒸馏 分离区包含进一步的精馏单元，后者分离形成的（甲基）丙烯酸烷基酯。

    Continuous preparation of alkyl esters of (meth)acrylic acid
    3.
    发明授权
    Continuous preparation of alkyl esters of (meth)acrylic acid 失效
    连续制备（甲基）丙烯酸的烷基酯

    公开(公告)号：US06072076A

    公开(公告)日：2000-06-06

    申请号：US789542

    申请日：1997-01-27

    申请人： Willi Schmidt ,  Matthias Geisendorfer ,  Alexander Weck ,  Toni Dockner ,  Holger Herbst ,  Gerhard Nestler

    发明人： Willi Schmidt ,  Matthias Geisendorfer ,  Alexander Weck ,  Toni Dockner ,  Holger Herbst ,  Gerhard Nestler

    IPC分类号： B01J31/02 ,  C07B61/00 ,  C07C67/08 ,  C07C67/54 ,  C07C69/54 ,  C07C69/52

    CPC分类号： C07C67/08

    摘要： In a process for the continuous preparation of alkyl esters of (meth)acrylic acid by reacting (meth)acrylic acid with alkanols having from 1 to 8 carbon atoms in a homogeneous, liquid, solvent-free phase at elevated temperature and in the presence of an acid esterification catalyst, in which the (meth)acrylic acid, the alkanol and the acid catalyst are fed to a reaction zone, the water formed is removed by rectification during a residence time as constituent of a mixture comprising starting alkanol in a rectification unit (III) superposed on the reaction zone, the distillate obtained is separated into an organic phase comprising alkanol and an aqueous phase comprising water, the organic phase is essentially completely returned to the rectification unit (III), the reaction mixture is discharged from the reaction zone and conveyed into a distillative separation zone comprising further rectification units and in the latter the alkyl (meth)acrylate formed is separated off.a) (Meth)acrylic acid and alkanol are reacted in a molar ratio of from 1:0.75 to 1:2, b) part of the aqueous phase obtained at the top of the rectification unit (III) is returned to the rectification unit, c) the reaction mixture discharged from the reaction zone is fed to a further rectification unit (I) and in this the reaction mixture is separated into a product (II) comprising the catalyst and a product (I) comprising the alkyl ester of (meth)acrylic acid, remaining alkanol and remaining (meth)acrylic acid, and d) the product (I) is fed to a further rectification unit (II) and in this the alkyl ester of (meth)acrylic acid is separated from the remaining alkanol and from the remaining (meth)acrylic acid and the remaining alkanol and the remaining (meth)acrylic acid are returned to the reaction zone.

    摘要翻译： 在（甲基）丙烯酸的烷基酯的连续制备方法中，通过使（甲基）丙烯酸与具有1至8个碳原子的链烷醇在均相，液体，无溶剂相中在升高的温度下和在 将（甲基）丙烯酸，链烷醇和酸催化剂进料到反应区中的酸酯化催化剂，在停留时间内通过精馏除去形成的水，作为在精馏单元中起始烷醇的混合物的组分 （III），将获得的馏出物分离成包含链烷醇和含水的水相的有机相，有机相基本上完全返回到精馏单元（III），将反应混合物从反应物中排出 并输送到包含进一步精馏单元的蒸馏分离区中，后者分离形成的（甲基）丙烯酸烷基酯。 a）（甲基）丙烯酸和链烷醇的摩尔比为1:0.75至1:2，b）将在精馏单元（III）顶部获得的部分水相返回至精馏单元， c）将从反应区排出的反应混合物加入到另一精馏单元（I）中，并将反应混合物分离成包含催化剂的产物（II）和包含（甲基）丙烯酸烷基酯的产物（I） ）丙烯酸，残留的链烷醇和剩余的（甲基）丙烯酸，以及d）将产物（I）加入到另一精馏单元（II）中，在此将（甲基）丙烯酸的烷基酯与剩余的链烷醇 和剩余的（甲基）丙烯酸和剩余的链烷醇和剩余的（甲基）丙烯酸返回到反应区。

    Production of polytetrahydrofuran with terminal hydroxyl groups by changing the continuous and dispersed phase
    4.
    发明授权
    Production of polytetrahydrofuran with terminal hydroxyl groups by changing the continuous and dispersed phase 有权
    通过改变连续和分散相来生产具有末端羟基的聚四氢呋喃

    公开(公告)号：US06300467B1

    公开(公告)日：2001-10-09

    申请号：US09445993

    申请日：2000-03-29

    申请人： Heinz Auer ,  Jürgen Ciprian ,  Lothar Franz ,  Wolfgang Franzischka ,  Gabriele Iffland ,  Alexander Weck ,  Werner Weinle

    发明人： Heinz Auer ,  Jürgen Ciprian ,  Lothar Franz ,  Wolfgang Franzischka ,  Gabriele Iffland ,  Alexander Weck ,  Werner Weinle

    IPC分类号： C08F600

    CPC分类号： C08G65/30 ,  C08G65/20 ,  C08G65/3312

    摘要： The present invention relates to a process for preparing hydroxyl-containing polymers, in particular for preparing polytetrahydrofuran with terminal hydroxyl groups, from the corresponding acyloxy-containing polymers by transesterification with alcohols in the presence of an alkali metal- or alkaline earth metal-containing catalyst, which entails the appropriate acyloxy-containing polymer being introduced together with the alcohol and the catalyst into a first prereactor (I) and converted therein at least partly to the hydroxyl-containing polymer, and the reaction solution being fed into the upper zone (IIa) of a distillation column (II) into whose lower zone (IIb) alcohol in vapor phase is additionally fed. This involves a phase exchange at the coherent and the disperse phase at the transition from the prereactor to the distillation column. Preferably, in addition to the first prereactor, a further 3 prereactors are used which serve as holdup reactors.

    摘要翻译： 本发明涉及一种制备含羟基聚合物的方法，特别是通过在含碱金属或碱土金属的催化剂存在下与醇进行酯交换从相应的含酰氧基的聚合物制备具有末端羟基的聚四氢呋喃 ，其使得适当的含酰氧基的聚合物与醇和催化剂一起引入第一预反应器（I）中并在其中至少部分地转化为含羟基聚合物，并将反应溶液进料到上部区域（IIa ）蒸馏塔（II），其中进一步加入气相中的低级（IIb）醇。 这涉及在从预反应器到蒸馏塔的过渡处的相干和分散相的相交换。 优选地，除了第一预反应器之外，还使用用作保持反应器的另外3个预反应器。

    PROCESS FOR PREPARING TETRAHYDROFURAN
    6.
    发明申请
    PROCESS FOR PREPARING TETRAHYDROFURAN 审中-公开
    制备四氢呋喃的方法

    公开(公告)号：US20110245517A1

    公开(公告)日：2011-10-06

    申请号：US12740468

    申请日：2009-11-05

    申请人： Gunther Windecker ,  Jens Weiguny ,  Alexander Weck ,  Ellen Dahlhoff ,  Ralf Freyberger

    发明人： Gunther Windecker ,  Jens Weiguny ,  Alexander Weck ,  Ellen Dahlhoff ,  Ralf Freyberger

    IPC分类号： C07D307/08

    CPC分类号： C07D307/08

    摘要： The present invention relates to a process for preparing tetrahydrofuran by absorption of C4-dicarboxylic acids and/or derivatives thereof from a crude product mixture into an organic solvent or water as absorption medium, removal of the absorption medium, catalytic hydrogenation of the resulting C4-dicarboxylic acids and/or derivatives thereof and distillation of the water-comprising crude tetrahydrofuran in at least one distillation column, wherein THF-comprising waste streams from the distillation are catalytically hydrogenated with complete or partial recirculation to the process.

    摘要翻译： 本发明涉及通过将C4-二羧酸和/或其衍生物从粗产物混合物吸收到作为吸收介质的有机溶剂或水中，去除吸收介质，催化氢化所得C4-二羧酸和/ 二羧酸和/或其衍生物，并在至少一个蒸馏塔中蒸馏含水的粗四氢呋喃，其中来自蒸馏的含THF的废物流通过完全或部分再循环进行催化氢化。

    Method for producing xylylenediamine (XDA)
    8.
    发明授权
    Method for producing xylylenediamine (XDA) 失效
    苯二甲胺（XDA）生产方法

    公开(公告)号：US07541497B2

    公开(公告)日：2009-06-02

    申请号：US10571584

    申请日：2004-08-27

    申请人： Randolf Hugo ,  Sabine Jourdan ,  Kirsten Wenz ,  Thomas Preiss ,  Alexander Weck

    发明人： Randolf Hugo ,  Sabine Jourdan ,  Kirsten Wenz ,  Thomas Preiss ,  Alexander Weck

    IPC分类号： C07C29/48

    CPC分类号： C07C209/48 ,  C07C211/27

    摘要： A process for preparing xylylenediamine, comprising the steps of ammoxidizing xylene to phthalonitrile, by contacting the vaporous product of the ammoxidation stage directly with a liquid organic solvent (quench), and hydrogenating the phthalonitrile in the resulting quench solution or suspension, wherein the organic solvent is N-methyl-2-pyrrolidone (NMP).

    摘要翻译： 一种制备苯二甲胺的方法，包括通过使氨氧化阶段的蒸气产物直接与液体有机溶剂（骤冷）接触，并将所得的淬灭溶液或悬浮液中的邻苯二甲腈氢化，从而将二甲苯与邻苯二甲腈氨氧化，其中有机溶剂 是N-甲基-2-吡咯烷酮（NMP）。

    Method for producing xylylenediamine (XDA)
    9.
    发明授权
    Method for producing xylylenediamine (XDA) 失效
    苯二甲胺（XDA）生产方法

    公开(公告)号：US07528284B2

    公开(公告)日：2009-05-05

    申请号：US10571425

    申请日：2004-09-04

    申请人： Randolf Hugo ,  Sabine Jourdan ,  Kirsten Wenz ,  Thomas Preiss ,  Alexander Weck

    发明人： Randolf Hugo ,  Sabine Jourdan ,  Kirsten Wenz ,  Thomas Preiss ,  Alexander Weck

    IPC分类号： C07C209/00

    CPC分类号： C07C209/48 ,  C07C211/27

    摘要： A process for preparing xylylenediamine, comprising the steps of ammoxidizing xylene to phthalonitrile and hydrogenating the phthalonitrile, which comprises contacting the vaporus product of the ammoxidation stage directly with a liquid organic solvent or with molten phthalonitrile (quench), partly or fully removing components having a boiling point lower than phthalonitrile (low boilers) from the resulting quench solution or suspention or phthalonitrile melt and, before the hydrogenation, of the phthalonitrile, not removing any products having a boiling point higher than phthalonitrile (high boilers).

    摘要翻译： 一种制备苯二甲胺的方法，包括以下步骤：将二甲苯与邻苯二甲腈氨化并氢化邻苯二甲腈，其包括将氨氧化阶段的蒸气产物直接与液体有机溶剂或熔融的邻苯二甲腈（骤冷）接触，部分或全部除去具有 沸点低于邻苯二甲腈（低锅炉），从所得的淬火溶液或悬浮液或邻苯二甲腈熔融，在氢化之前，邻苯二甲腈，不去除沸点高于邻苯二甲腈（高锅炉）的任何产物。