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    Separation of a diester of (meth)acrylic acid with a C.sub.4 -C.sub.6 -alkanediol
    4.
    发明授权
    Separation of a diester of (meth)acrylic acid with a C.sub.4 -C.sub.6 -alkanediol 失效
    （甲基）丙烯酸的二酯与C4-C6-链烷二醇的分离

    公开(公告)号：US5663421A

    公开(公告)日：1997-09-02

    申请号：US541703

    申请日：1995-10-10

    申请人： Toni Dockner ,  Helmut Lermer ,  Ulrich Rauh ,  Gerhard Nestler

    发明人： Toni Dockner ,  Helmut Lermer ,  Ulrich Rauh ,  Gerhard Nestler

    IPC分类号： C07C57/07 ,  C07C67/08 ,  C07C67/58 ,  C07C69/54 ,  C07C67/48

    CPC分类号： C07C67/58

    摘要： A diester of (meth)acrylic acid with a C.sub.4 -C.sub.6 -alkanediol is separated from a mixture which essentially consists of the C.sub.4 -C.sub.6 -alkanediol, the monoester of (meth)acrylic acid with the C.sub.4 -C.sub.6 -alkanediol and the diester of (meth)acrylic acid with the C.sub.4 -C.sub.6 -alkanediol by extraction with an organic solvent in the presence of water, by a process in which the diester-containing mixture is added continuously in the middle section of an extraction column and in addition water and the organic extracting agent are passed continuously countercurrent in the extraction column.

    摘要翻译： （甲基）丙烯酸与C4-C6-链烷二醇的二酯与C4-C6-链烷二醇，（甲基）丙烯酸与C4-C6-链烷二醇的单酯和 （甲基）丙烯酸与C4-C6-链烷二醇的有机溶剂在水的存在下萃取，其中将含二酯的混合物连续加入萃取塔的中间部分，另外加入水和 有机提取剂在提取塔中持续逆流通过。

    Continuous preparation of alkyl esters of (meth)acrylic acid
    5.
    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。

    Continuous preparation of alkyl esters of (meth)acrylic acid
    7.
    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。