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1.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：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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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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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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公开(公告)号：US06512138B1
公开(公告)日：2003-01-28
申请号：US09567983
申请日：2000-05-10
IPC分类号： C07C6952
CPC分类号： C07C67/08 , C07C67/327 , C07C69/54
摘要： The process for the esterification of (meth)acrylic acid with an alkanol in the presence of an esterification catalyst, in which unconverted starting compounds and the (meth)acrylate to be formed are separated off by distillation and an oxyester-containing bottom product is formed and is separated off, and (a) in the bottom product separated off, the oxyesters present are cleaved, if required after the addition of (meth)acrylic acid and/or oligomeric (meth)acrylic acid, directly in the presence of acid catalysts differing from (meth)acrylic acid and/or oligomeric (meth)acrylic acid, and the cleavage products are removed, a cleavage residue remaining, or (b) the oxyesters are first removed by distillation from the cleavage product separated off, a distillation residue remaining, and the oxyesters removed are cleaved, if required after addition of (meth)acrylic acid and/or oligomeric (meth)acrylic acid, in the presence of acid catalysts differing from (meth)acrylic acid and/or oligomeric (meth)acrylic acid, and the cleavage products are removed, a cleavage residue remaining, is carried out in such a way that the cleavage residue obtained in step (a) or the cleavage residue obtained in step (b) is hydrolytically cleaved together with the resulting distillation residue in the presence of water and acids or bases.
摘要翻译： 在酯化催化剂存在下，（甲基）丙烯酸与烷醇的酯化反应的方法，其中未转化的起始化合物和待形成的（甲基）丙烯酸酯通过蒸馏和含有含氧酯的底部产物分离出来 并分离出来，（a）在分离出的底部产物中，如果需要，在酸催化剂存在下直接加入（甲基）丙烯酸和/或低聚（甲基）丙烯酸后，存在的氧化酯被切割 与（甲基）丙烯酸和/或低聚（甲基）丙烯酸不同，除去裂解产物，剩余的裂解残余物或（b）氧酯首先通过蒸馏从分离的裂解产物中除去，蒸馏残余物 除去（甲基）丙烯酸和/或低聚（甲基）丙烯酸之外，如果需要，在不同于（甲基）丙烯酸和/或低聚（甲基）丙烯酸的酸催化剂的存在下， 甲基）丙烯酸，并且去除裂解产物，残留切割残余物，使得步骤（a）中获得的裂解残基或步骤（b）中获得的裂解残基与 在水和酸或碱的存在下产生蒸馏残余物。
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公开(公告)号：US06187947B1
公开(公告)日：2001-02-13
申请号：US09308252
申请日：1999-05-25
IPC分类号： C07C6708
摘要： The disclosure is a process for preparing (meth)acrylic esters by reacting (meth)acrylic acid with C4-C6-alkanols in the presence of a strong inorganic acid or of a C4-C6-monoalkyl ester of a polybasic strong acid as catalyst, which comprises removing the unconverted alkanol from the resulting reaction mixture by distillation and thereafter removing the catalyst from the resulting mixture.
摘要翻译： 本公开是通过在强无机酸或多元强酸的C 4 -C 6单烷基酯作为催化剂存在下使（甲基）丙烯酸与C 4 -C 6 - 链烷醇反应来制备（甲基）丙烯酸酯的方法， 其包括通过蒸馏从所得反应混合物中除去未转化的链烷醇，然后从所得混合物中除去催化剂。
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公开(公告)号：US5910603A
公开(公告)日：1999-06-08
申请号：US701989
申请日：1996-08-23
CPC分类号： C07C67/327 , C07C67/08 , C07C67/60
摘要： In a process for esterifying (meth)acrylic acid with an alkanol in the presence of an acidic esterification catalyst, in which unconverted starting compounds and the (meth)acrylates to be formed are separated off by distillation and an oxyester-containing bottom product is formed, the bottom product is separated off and is heated in the presence of an acid to 150-250.degree. C. and the pressure is adjusted so that the cleavage products formed under the abovementioned conditions from the oxyesters contained in the bottom product evaporate directly. The process can be carried out in the presence of molecular oxygen. Mineral acids, for example sulfuric acid or phosphoric acid and/or alkanesulfonic or arylsulfonic acids, for example methanesulfonic acid or p-toluenesulfonic acid, can be added to the bottom product.
摘要翻译： 在酸性酯化催化剂存在下，用链烷醇酯化（甲基）丙烯酸的方法中，其中未转化的起始化合物和待形成的（甲基）丙烯酸酯通过蒸馏分离并形成含有含氧酯的底部产物 将底部产物分离并在酸存在下加热至150-250℃，并调节压力，使得在上述条件下由底部产物中含有的含氧酯形成的裂解产物直接蒸发。 该方法可以在分子氧的存在下进行。 矿物酸，例如硫酸或磷酸和/或链烷磺酸或芳基磺酸，例如甲磺酸或对甲苯磺酸，可以加入到底部产物中。
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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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