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公开(公告)号：US06455732B1
公开(公告)日：2002-09-24
申请号：US09556527
申请日：2000-04-21
IPC分类号： C07C5702
摘要： Pure acrylic acid is stored and/or transported by a process in which the pure acrylic acid is stored and/or transported as liquid aqueous solution at ≦15° C.
摘要翻译： 纯丙烯酸通过其中纯丙烯酸在<= 15℃下作为液体水溶液储存和/或运输的方法储存和/或运输。
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公开(公告)号：US5011809A
公开(公告)日：1991-04-30
申请号：US471544
申请日：1990-01-29
申请人： Klaus Herzog , Karl-Heinz Boehning , Heinrich Aichinger , Juergen Plueckhan , Wolf D. Mross , Matthias Schwarzmann
发明人： Klaus Herzog , Karl-Heinz Boehning , Heinrich Aichinger , Juergen Plueckhan , Wolf D. Mross , Matthias Schwarzmann
IPC分类号： B01J23/66 , B01J37/02 , C07D301/10
CPC分类号： B01J23/66 , B01J37/0201 , C07D301/10
摘要： Supported silver catalysts which contain one or more alkali metals are prepared in a two-stage process by doping a basic catalyst which contains silver in metallic form and may also contain lithium with the heavy alkali metal sodium, potassium, rubidium and/or cesium using an impregnating solution which contains the heavy alkali metal and one or more nitrates of the general formulaR.sup.+ NO.sub.3.sup.-wherein R.sup.+ is an ammonium, hydrazinium, C.sub.1 -C.sub.12 -monoalkylammonium, C.sub.2 -C.sub.12 -dialkylammonium, C.sub.3 -C.sub.12 -trialkylammonium or C.sub.4 -C.sub.12 -tetraalkylammonium cation.
摘要翻译： 含有一种或多种碱金属的负载型银催化剂通过掺杂含有金属形式的银的碱性催化剂并且还可以使用重质碱金属钠，钾，铷和/或铯来包含锂，通过两步法制备。 含有重质碱金属和一种或多种通式为R + NO 3 - 的硝酸盐的浸渍溶液，其中R +是铵，肼，C1-C12-单烷基铵，C2-C12-二烷基铵，C3-C12-三烷基铵或C4-C12 四烷基铵阳离子。
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3.发明授权Process for stabilizing (METH)acrylic acid esters against unwanted radical polymerization 有权稳定（METH）丙烯酸酯以防止不必要的自由基聚合的方法公开(公告)号：US06518452B1
公开(公告)日：2003-02-11
申请号：US09485192
申请日：2000-02-07
IPC分类号： C07C6952
摘要： A method is described of stabilizing (meth)acrylic esters against unwanted free-radical polymerization, in which the mixture to be stabilized has added to it a polymerization inhibitor mixture comprising at least one nitroxyl radical and/or at least one organic compound having at least one nitroso group, and at least one p-phenylenediamine.
摘要翻译： 描述了稳定（甲基）丙烯酸酯以防止不需要的自由基聚合的方法，其中要稳定的混合物加入其中包含至少一个硝酰基和/或至少一种有机化合物的聚合抑制剂混合物，其至少具有至少 一个亚硝基和至少一个对苯二胺。
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4.发明授权公开(公告)号：US06458989B1
公开(公告)日：2002-10-01
申请号：US09646126
申请日：2000-09-28
申请人： Heinrich Aichinger , Hans Martan , Gerhard Nestler
发明人： Heinrich Aichinger , Hans Martan , Gerhard Nestler
IPC分类号： C07C6748
摘要： A process for preparing pure (meth)acrylic acid or a (meth)acrylate starting from a crude (meth)acrylic acid, which comprises the following stages: A: treating the crude (meth)acrylic acid with at least one compound which is able to remove aldehydes, to give an aldehyde-free crude (meth)acrylic acid; B: subjecting the aldehyde-free crude (meth)acrylic acid to imprecise distillation, to give a low-boiling fraction comprising (meth)acrylic acid and acetic acid and a high-boiling fraction comprising (meth)acrylic acid and high boilers; C: isolating a pure (meth)acrylic acid from the high-boiling fraction and, if desired, D: esterifying the low-boiling fraction comprising (meth)acrylic acid and acetic acid that is obtained in stage B by means of one or more alkanols, to give an esterification mixture comprising one or more (meth)acrylates, one or more acetic esters, and one or more alkanols.
摘要翻译： 一种从粗（甲基）丙烯酸开始制备纯（甲基）丙烯酸或（甲基）丙烯酸）的方法，其包括以下阶段：A：用至少一种能够 去除醛，得到无醛的粗（甲基）丙烯酸; B：使无醛粗（甲基）丙烯酸不精确地进行蒸馏，得到包含（甲基）丙烯酸和乙酸的低沸点馏分 以及包含（甲基）丙烯酸和高沸点剂的高沸点馏分; C：从高沸点馏分中分离出纯的（甲基）丙烯酸，如果需要，D：酯化包含（甲基）丙烯酸的低沸点馏分 通过一种或多种链烷醇在阶段B中获得的酸和乙酸，得到包含一种或多种（甲基）丙烯酸酯，一种或多种乙酸酯和一种或多种链烷醇的酯化混合物。
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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
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。
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6.发明授权Catalytic decomposition of dinitrogen monoxide which is pure or present in gas mixtures 失效纯的或存在于气体混合物中的一氧化二氮的催化分解
公开(公告)号：US5300269A
公开(公告)日：1994-04-05
申请号：US757387
申请日：1991-09-10
申请人： Heinrich Aichinger , Karl-Heinz Boehning , Klaus Herzog , Hermann Wistuba , Gert Buerger , Matthias Schwarzmann , Guenter Herrmann
发明人： Heinrich Aichinger , Karl-Heinz Boehning , Klaus Herzog , Hermann Wistuba , Gert Buerger , Matthias Schwarzmann , Guenter Herrmann
CPC分类号： B01D53/8628 , B01J23/50 , B01D2255/104 , B01D2255/9207 , B01D2257/402 , B01J35/1014 , Y02C20/10
摘要： A catalyst for decomposing dinitrogen monoxide which is pure or present in gas mixtures comprises metallic silver applied to an alumina carrier with a BET surface area of from 5 to 25 m.sup.2 /g.
摘要翻译： 用于分解纯的或存在于气体混合物中的一氧化二氮的催化剂包括施加到BET表面积为5至25m 2 / g的氧化铝载体上的金属银。
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公开(公告)号：US06504056B2
公开(公告)日：2003-01-07
申请号：US09845268
申请日：2001-05-01
IPC分类号： C07C5142
摘要： A method of transporting and/or storing pure acrylic acid comprises ensuring by means of appropriate measures that the pure acrylic acid is partly crystalline during the entire duration of transport and/or storage.
摘要翻译： 运输和/或储存纯丙烯酸的方法包括通过适当的措施确保纯丙烯酸在运输和/或储存的整个持续期间是部分结晶的。
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公开(公告)号：US06353130B1
公开(公告)日：2002-03-05
申请号：US09830565
申请日：2001-05-07
IPC分类号： C07C6952
摘要： A method for continuous production of (meth)acrylic alkyl esters by reacting (meth)acrylic acid with alkanols containing 1-8 C-atoms, whereby raw (meth)acrylic acid containing acetic acid is used as a starting compound and the alkyl acetate that is formed as a by-product is evacuated in an appropriate area.
摘要翻译： 使用（甲基）丙烯酸与含有1-8个碳原子的链烷醇反应连续生产（甲基）丙烯酸烷基酯的方法，由此使用含有乙酸的原料（甲基）丙烯酸作为原料化合物， 形成副产物在适当的区域被排空。
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公开(公告)号：US06320070B1
公开(公告)日：2001-11-20
申请号：US09308251
申请日：1999-05-25
IPC分类号： C07C6952
摘要： (Meth)acrylic esters are prepared by reacting (meth)acrylic acid with a C4-C12-alkanol in the presence of sulfuric acid or a mono-C4-C12-alkyl sulfate as catalyst, wherein a) the reaction is carried out in an esterification unit which comprises a first reactor and at least one further reactor, b) a mixture of (meth)acrylic acid, C4-C12-alkanol and catalyst which contains not more than 5% by weight of water, based on the sum of the starting materials, is introduced into the first reactor, c) the esterification in the first reactor is conducted without removing ester, alkanol or water to a (meth)acrylic acid conversion of at least 40%, but only so far that the mixture remains a single phase, and d) the esterification is continued in at least one further reactor with the water formed being removed by distillation.
摘要翻译： （甲基）丙烯酸酯通过使（甲基）丙烯酸与C 4 -C 12烷醇在硫酸或作为催化剂的一种C 1 -C 12烷基硫酸盐存在下反应制备，其中a）反应在酯化反应中进行 单元，其包含第一反应器和至少一个另外的反应器，b）（m）丙烯酸，C 4 -C 12烷醇和催化剂的混合物，其含有不超过5重量％的水，基于起始 材料被引入到第一反应器中，c）在不将酯，链烷醇或水除去至少40％的（甲基）丙烯酸转化率的情况下，在第一反应器中进行酯化，但是仅仅到混合物保持单一 相和d）在至少一个另外的反应器中继续酯化，形成的水通过蒸馏除去。
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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
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。
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