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公开(公告)号：US09963417B2
公开(公告)日：2018-05-08
申请号：US15037212
申请日：2014-12-11
CPC分类号： C07C67/39 , B01J23/892 , C07C45/75 , Y02P20/582 , C07C69/54
摘要： The present invention relates to a catalytic continuous process for producing methyl methacrylate, said process comprising the step of reacting methacrolein with oxygen and methanol in the presence of a heterogeneous noble-metal-containing catalyst in an oxidative esterification reaction to give methyl methacrylate, characterized in that the stationary concentration of the starting material methacrolein is equal to or less than 12% by weight based on the total weight of the reaction mixture in the reactor, and the ratio F between the total liquid volume within the reactor expressed in liters divided by the total weight of catalyst in the reactor expressed in kilograms is equal to or less than 4.
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公开(公告)号：US09617199B2
公开(公告)日：2017-04-11
申请号：US15030775
申请日：2014-12-05
申请人： Steffen Krill , Alexander Lygin , Torsten Balduf , Rudolf Burghardt , Andreas Tepperis , Matthias Groemping
发明人： Steffen Krill , Alexander Lygin , Torsten Balduf , Rudolf Burghardt , Andreas Tepperis , Matthias Groemping
CPC分类号： C07C67/39 , B01J23/02 , B01J23/892 , B01J35/0006 , B01J35/0013 , Y02P20/582 , C07C69/54
摘要： The present invention relates to a process for preparing methyl methacrylate by a direct oxidative esterification of methacrolein with oxygen and methanol, which is conducted in the liquid phase at a pressure of 2 to 100 bar with a gold catalyst. According to the invention, the liquid phase is withdrawn continuously from the reactor and optionally enriched with oxygenous gas, the pH, after the withdrawal, is adjusted to a pH between 5 and 9 by means of addition of a basic solution and this liquid phase is conducted back into the reactor again to an extent of at least 50%.
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公开(公告)号：US09890105B2
公开(公告)日：2018-02-13
申请号：US14784320
申请日：2014-04-11
申请人： Steffen Krill , Torsten Balduf , Martin Koestner , Matthias Groemping , Alexander Lygin , Rudolf Burghardt
发明人： Steffen Krill , Torsten Balduf , Martin Koestner , Matthias Groemping , Alexander Lygin , Rudolf Burghardt
摘要： The present invention relates to a process for producing methyl methacrylate, comprising the following steps: A) producing methacrolein and B) reacting the methacrolein obtained in step A) in an oxidative esterification reaction to give methyl methacrylate, characterized in that the two steps A) and B) take place in a liquid phase at a pressure of from 2 to 100 bar, and step B) is carried out in the presence of a heterogeneous noble-metal-containing catalyst comprising metals and/or comprising metal oxides.
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4.发明授权Method for producing methacrolein and the conditioning/draining thereof for direct oxidative esterification 有权甲基丙烯醛的制备方法及其直接氧化酯化的调理/排水公开(公告)号：US09580374B2
公开(公告)日：2017-02-28
申请号：US14916440
申请日：2014-08-27
CPC分类号： C07C45/75 , C07C45/80 , C07C45/82 , C07C45/84 , C07C67/39 , C07C67/54 , C07C69/54 , C07C47/22
摘要： The present invention relates to a process for preparing methyl methacrylate by direct oxidative esterification of methacrolein and the preparation of methacrolein. It is a feature of this novel process that it was possible to distinctly increase the yield and the efficiency of the process compared to the prior art through a sequence of different distillation steps.
摘要翻译： 本发明涉及通过甲基丙烯醛的直接氧化酯化和甲基丙烯醛的制备来制备甲基丙烯酸甲酯的方法。 这种新方法的一个特征是，通过不同蒸馏步骤的顺序，与现有技术相比，有可能明显提高该方法的产率和效率。
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公开(公告)号：US09732023B2
公开(公告)日：2017-08-15
申请号：US14773602
申请日：2014-03-13
申请人： Torsten Balduf , Steffen Krill , Rudolf Burghardt
发明人： Torsten Balduf , Steffen Krill , Rudolf Burghardt
CPC分类号： C07C51/252 , B01J19/245 , B01J2219/24 , C07C45/75 , C07C51/44 , C07C51/48 , Y02P20/582 , C07C57/04 , C07C47/22
摘要： The invention relates to a process for preparation of at least one of methacrylic acid and a methacrylic acid ester, comprising the process stepsgas phase oxidation of at least one C4 compound, quenching of the reaction phase, separation and purification of the obtained methacrylic acid and optionally esterification, wherein the C4 compound is a methacrolein comprising mixture, originating from at least two different methacrolein sources, a first methacrolein source being a feed stream obtained by the heterogeneously catalyzed gas phase oxidation of isobutylene or tert-butyl alcohol or isobutylaldehyde or a mixture of two or more thereof, a second methacrolein source being a feed stream obtained by the reaction of propionaldehyde with a C1 extending agent, preferably formaldehyde, and where said methacrolein can be obtained either completely from the first methacrolein source, or completely from the second methacrolein source or from any mixture of both.
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公开(公告)号：US10125077B2
公开(公告)日：2018-11-13
申请号：US15515682
申请日：2015-11-16
IPC分类号： C07C57/02 , C07C57/04 , C07C45/75 , C07C51/25 , C07C51/48 , B01D3/14 , B01D69/02 , B01J19/18 , C07C51/235 , C07C47/04 , C07C47/22
摘要： The present invention relates to an optimized process for preparing methacrylic acid, wherein methacrolein is prepared in a first stage from propionaldehyde and formaldehyde by means of a Mannich reaction and oxidized in a second stage to methacrylic acid. More particularly, the present invention relates to the reduction in the amounts of catalyst to be used in the first stage, especially to the reduction in the amounts of acid to be used here, by virtue of the additional installation of recycling streams suitable for the purpose.
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7.发明申请Cleaving Of Oligomeric (Meth) Acrylic Acid In A Liquid Phase Under Pressure 审中-公开在压力下在液相中裂解低聚（甲基）丙烯酸公开(公告)号：US20070280866A1
公开(公告)日：2007-12-06
申请号：US10589775
申请日：2005-02-18
申请人： Torsten Balduf , Jurgen Mosler , Thomas Rathke , Dennis Thong Yu-Chiang , Axel Kobus , Rudolf Burghardt , Michael Fricke , Stefan Nordhoff
发明人： Torsten Balduf , Jurgen Mosler , Thomas Rathke , Dennis Thong Yu-Chiang , Axel Kobus , Rudolf Burghardt , Michael Fricke , Stefan Nordhoff
IPC分类号： B01J8/00 , C07C237/16 , C07C55/00 , C07C69/74
CPC分类号： B01D9/0059 , B01D3/14 , B01D3/146 , B01D5/0054 , B01J19/24 , B01J2219/00006 , B01J2219/00094 , C07C51/09 , C07C67/03 , C07C57/04 , C07C69/54
摘要： The present invention relates to a process for cleaving a (meth)acrylic acid oligomer of structure I wherein R1 is a hydrogen atom or a C1 to C10 alkyl groups, R2 is a hydrogen atom or a methyl group, and n is a whole number within the range between 1 and 200, optionally in the presence of a cleaving agent of the structure R3—OH or of the structure (R4)2—N—H, whereby R3 is a hydrogen atom, a C1 to C12 alkyl group, or a —CxH2x—OH— group, whereby x is a whole number within a range from 1 to 12, and R4 is a hydrogen atom or a C1 to C12 alkyl group, with the proviso that not both R4 groups are hydrogen atoms, whereby the (meth)acrylic acid oligomers are heated with the cleaving agent to a temperature of at least 50° C. at a pressure of at least 1 bar. The present invention also relates to the use of water, optionally with a protic compound as cleaving agent for cleaving (meth)acrylic acid oligomers, a device for (meth)acrylic acid synthesis, the use of this device for production of (meth)acrylic acid, as well as (meth)acrylic acid which has been produced using this device.
摘要翻译： 本发明涉及一种用于切割结构I的（甲基）丙烯酸低聚物的方法，其中R 1是氢原子或C 1至C 10 烷基，R 2是氢原子或甲基，n是整数在1和200之间的范围内，任选地在存在结构的裂解剂的情况下 R 3 -OH或结构（R 4 S）2 -NH，其中R 3是氢 原子，C 1至C 12烷基或-C 2 H 2 H 2 -OH基团 ，其中x是在1至12的范围内的整数，R 4是氢原子或C 1至C 12的整数。 烷基，条件是不是两个R 4基团都是氢原子，由此将（甲基）丙烯酸低聚物用裂解剂加热到至少50℃的温度，压力 至少1巴。 本发明还涉及水，任选地含有质子化合物作为裂解（甲基）丙烯酸低聚物的裂解剂的用途，（甲基）丙烯酸合成装置，使用该装置生产（甲基）丙烯酸 酸，以及使用该装置制备的（甲基）丙烯酸。
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公开(公告)号：US07253329B2
公开(公告)日：2007-08-07
申请号：US10790094
申请日：2004-03-02
申请人： Juergen Herwig , Norbert Wilczok , Martin Roos , Rudolf Burghardt , Johann Gaube , Georg Oenbrink , Bernd Guenzel
发明人： Juergen Herwig , Norbert Wilczok , Martin Roos , Rudolf Burghardt , Johann Gaube , Georg Oenbrink , Bernd Guenzel
CPC分类号： C07C5/05 , C07C2521/04 , C07C2523/44 , C07C13/275
摘要： A process for preparing cyclododecene by selective gas-phase hydrogenation of at least one starting material selected from cyclododecatriene, cyclododecadiene and mixtures thereof, wherein the starting material present in the gas phase is hydrogenated in the presence of a catalyst in a fixed-bed reactor and the Bodenstein number for the process is greater than 100.
摘要翻译： 通过选择性气相氢化选自环十二碳三烯，环十二碳二烯及其混合物的至少一种原料制备环十二烯的方法，其中存在于气相中的原料在固定床反应器中在催化剂存在下氢化， 该过程的博登斯坦号码大于100。
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