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    Granular abrasive material
    1.
    发明授权
    Granular abrasive material 失效
    颗粒磨料

    公开(公告)号：US5259147A

    公开(公告)日：1993-11-09

    申请号：US22743

    申请日：1993-02-18

    申请人： Wolfgang Falz ,  Gunter Bigorajski ,  Herbert Exner

    发明人： Wolfgang Falz ,  Gunter Bigorajski ,  Herbert Exner

    IPC分类号： C09K3/14 ,  B24D3/00

    CPC分类号： C09K3/1418 ,  Y10T428/24413

    摘要： A granular abrasive material is produced from a dispersion consisting of raw materials containing alumina, compounds containing silica and other additives. The dispersion is ground to a sinterable slip with a grain size of less than 1 micrometer. The slip is dried and may be pressed before being subjected to a multi-stage heating process to produce sintered corundum crystals.

    摘要翻译： 粒状研磨材料由含有氧化铝的原料，含有二氧化硅的化合物和其它添加剂组成的分散体制成。 将分散体研磨成粒度小于1微米的可烧结滑移。 将该滑移物干燥并且可以在进行多级加热处理之前进行压制以制造烧结的刚玉晶体。

    Continuous preparation of alkyl esters of (meth)acrylic acid and apparatus for this purpose
    2.
    发明授权
    Continuous preparation of alkyl esters of (meth)acrylic acid and apparatus for this purpose 失效
    连续制备（甲基）丙烯酸的烷基酯和用于此目的的设备

    公开(公告)号：US5900125A

    公开(公告)日：1999-05-04

    申请号：US119649

    申请日：1998-07-21

    申请人： Herbert Exner ,  Karl Baur ,  Toni Dockner ,  Christiane Potthoff ,  Albrecht Dams

    发明人： Herbert Exner ,  Karl Baur ,  Toni Dockner ,  Christiane Potthoff ,  Albrecht Dams

    IPC分类号： C07C67/08 ,  C07C67/54 ,  C07C69/54 ,  B01D3/34 ,  C07C69/52

    CPC分类号： C07C67/08

    摘要： In a process and an apparatus for the continuous preparation of alkyl esters of (meth)acrylic acid by reacting (meth)acrylic acid and monohydric alkanols of 1 to 8 carbon atoms in the homogeneous, liquid, solvent-free phase at elevated temperatures and in the presence of an acidic esterification catalyst, by feeding the (meth)acrylic acid, the alkanol and the acid catalyst continuously to a reaction zone, the reaction zone consists of a cascade of at least two reaction regions connected in series, and the discharge stream of one reaction region forms a feed stream of a downstream reaction region. The cascade may have from two to four reaction regions is spatially separated from one another.

    摘要翻译： 在（甲基）丙烯酸的烷基酯的连续制备方法和装置中，通过使（甲基）丙烯酸和1至8个碳原子的一元链烷醇在均相，液体，无溶剂相中在高温和 酸性酯化催化剂的存在通过将（甲基）丙烯酸，链烷醇和酸催化剂连续进料到反应区，反应区由串联连接的至少两个反应区的级联组成，排出流 的一个反应区域形成下游反应区域的进料流。 级联可能具有两到四个反应区域在空间上彼此分离。

    Continuous preparation of alkyl esters of (meth) acrylic acid
    4.
    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：US5734074A

    公开(公告)日：1998-03-31

    申请号：US618817

    申请日：1996-03-20

    申请人： Toni Dockner ,  Herbert Exner ,  Karl Gerhard Baur ,  Christiane Potthoff

    发明人： Toni Dockner ,  Herbert Exner ,  Karl Gerhard Baur ,  Christiane Potthoff

    IPC分类号： C07C67/08 ,  C07C69/52

    CPC分类号： C07C67/08

    摘要： The continuous esterification of a C.sub.1 -C.sub.8 -alkanol with (meth)acrylic acid in a molar ratio of from 1:1 to 2:1 in the presence of proton-donating catalysts in a homogeneous, liquid, solvent-free phase, in which the water of reaction and resulting alkyl (meth)acrylate are separated off continuously as part of an aqueous azeotropic mixture via the top of a rectification zone attached to the reaction zone, at a top pressure of from 0.1 to 1 atm, and worked up to give pure (meth)acrylate, is carried out by a process wherein the reaction temperature is from 100.degree. to 150.degree. C., the residence time is from 1 to 5 hours and from 5 to 20% by weight, based on the amount of reaction mixture, of sulfuric acid or an equimolar amount, based on such an amount of sulfuric acid, of an organic sulfonic acid is added as a protic acid catalyst to the reaction mixture present in the reaction zone.

    摘要翻译： 在质子递送催化剂存在下，在均相，液体，无溶剂相中，C1-C8-链烷醇与（甲基）丙烯酸的摩尔比为1:1至2:1的连续酯化，其中 反应水和得到的（甲基）丙烯酸烷基酯作为水性共沸混合物的一部分经由连接到反应区的精馏区的顶部，在0.1至1atm的最高压力下连续分离，并加热至 得到纯的（甲基）丙烯酸酯，其反应温度为100〜150℃，停留时间为1〜5小时，5〜20重量％，以 加入作为质子酸催化剂的硫酸或等摩尔量的基于这样量的硫酸的有机磺酸的反应混合物加入存在于反应区中的反应混合物。

    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：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 and apparatus for this purpose
    6.
    发明授权
    Continuous preparation of alkyl esters of (meth)acrylic acid and apparatus for this purpose 失效
    连续制备（甲基）丙烯酸的烷基酯和用于此目的的设备

    公开(公告)号：US5811574A

    公开(公告)日：1998-09-22

    申请号：US713208

    申请日：1996-09-12

    申请人： Herbert Exner ,  Karl Baur ,  Toni Dockner ,  Christiane Potthoff ,  Albrecht Dams

    发明人： Herbert Exner ,  Karl Baur ,  Toni Dockner ,  Christiane Potthoff ,  Albrecht Dams

    IPC分类号： C07C67/08 ,  C07C67/54 ,  C07C69/54 ,  C07C69/52

    CPC分类号： C07C67/08

    摘要： In a process and an apparatus for the continuous preparation of alkyl esters of (meth)acrylic acid by reacting (meth)acrylic acid and monohydric alkanols of 1 to 8 carbon atoms in the homogeneous, liquid, solvent-free phase at elevated temperatures and in the presence of an acidic esterification catalyst, by feeding the (meth)acrylic acid, the alkanol and the acid catalyst continuously to a reaction zone, the reaction zone consists of a cascade of at least two reaction regions connected in series, and the discharge stream of one reaction region forms a feed stream of a downstream reaction region. The cascade may have from two to four reaction regions spatially separated from one another.

    摘要翻译： 在（甲基）丙烯酸的烷基酯的连续制备方法和装置中，通过使（甲基）丙烯酸和1至8个碳原子的一元链烷醇在均相，液体，无溶剂相中在高温和 酸性酯化催化剂的存在通过将（甲基）丙烯酸，链烷醇和酸催化剂连续进料到反应区，反应区由串联连接的至少两个反应区的级联组成，排出流 的一个反应区域形成下游反应区域的进料流。 级联可以具有在空间上彼此分离的两个至四个反应区域。

    Continuous preparation of alkyl esters of (meth)acrylic acid
    9.
    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。