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    Method for separating trioxane from a trioxane/formaldehyde/water mixture by means of pressure change rectification
    11.
    发明授权
    Method for separating trioxane from a trioxane/formaldehyde/water mixture by means of pressure change rectification 有权
    通过压力变换精馏从三恶烷/甲醛/水混合物中分离三恶烷的方法

    公开(公告)号：US07713387B2

    公开(公告)日：2010-05-11

    申请号：US10583698

    申请日：2004-12-21

    申请人： Markus Siegert ,  Neven Lang ,  Eckhard Ströfer ,  Achim Stammer ,  Thorsten Friese ,  Hans Hasse

    发明人： Markus Siegert ,  Neven Lang ,  Eckhard Ströfer ,  Achim Stammer ,  Thorsten Friese ,  Hans Hasse

    IPC分类号： B01D3/00 ,  C07D323/06 ,  C07C45/78

    CPC分类号： C07D323/06

    摘要： A process for removing trioxane from a use stream I of formaldehyde, trioxane and water, by a) providing a use stream I of formaldehyde as the main component and trioxane and water as the secondary components, b) mixing the use stream I with a recycle stream VII to obtain a feed stream Ia, c) distilling the use stream Ia in a first distillation stage to obtain a stream II of formaldehyde as the main component and water as the secondary component, and a stream III of trioxane as the main component and water and formaldehyde as the secondary components, d) distilling the stream III in a second distillation stage having a pressure higher than in the first distillation stage, to obtain a stream IV of trioxane and a stream V of trioxane as the main component and water and formaldehyde as the secondary components, e) distilling the stream V in a third distillation stage to obtain a stream VI of water and the recycle stream VII of trioxane as the main component and water and formaldehyde as the secondary components.

    摘要翻译： 一种从甲醛，三恶烷和水的使用流I中除去三恶烷的方法，通过以下步骤：a）提供以甲醛为主要成分的使用流I和作为第二组分的三恶烷和水，b）将使用流I与再循环 流VII以获得进料流Ia，c）在第一蒸馏阶段中蒸馏出使用流Ia以获得作为主要组分的甲醛的流II和作为第二组分的水，以及作为主要组分的三恶烷的流III和 水和甲醛作为次要组分，d）在具有高于第一蒸馏阶段的压力的第二蒸馏阶段中蒸馏料流III，得到三恶烷的流IV和三恶烷的流V作为主要成分， 甲醛作为次要组分，e）在第三蒸馏阶段中蒸馏物流V以获得水的流VI和三恶烷的再循环流VII作为主要成分，水和甲醛为t 他的次要成分。

    Integrated Method For the Production of Trioxane From Formaldehyde
    12.
    发明申请
    Integrated Method For the Production of Trioxane From Formaldehyde 审中-公开
    甲醛生产三恶烷的综合方法

    公开(公告)号：US20080281109A1

    公开(公告)日：2008-11-13

    申请号：US12063155

    申请日：2006-08-01

    申请人： Neven Lang ,  Eckhard Stroefer ,  Achim Stammer ,  Thorsten Friese ,  Markus Siegert ,  Hans Hasse ,  Thomas Grutzner ,  Sergej Blagov

    发明人： Neven Lang ,  Eckhard Stroefer ,  Achim Stammer ,  Thorsten Friese ,  Markus Siegert ,  Hans Hasse ,  Thomas Grutzner ,  Sergej Blagov

    IPC分类号： C07D323/06

    CPC分类号： C07D323/06 ,  Y02P20/125

    摘要： The invention relates to an integrated process for preparing trioxane from formaldehyde in which, in a first step, a stream A1 comprising water and formaldehyde and a recycle stream B2 consisting substantially of water and formaldehyde are fed to a trioxane synthesis reactor in which the formaldehyde is converted to trioxane to obtain a product stream A2 comprising trioxane, water and formaldehyde. Stream A2 and a recycle stream D1 comprising trioxane, water and formaldehyde are fed to a first distillation column and distilled at a pressure in the range from 0.1 to 2.5 bar to obtain a stream B1 enriched in trioxane, and the stream B2 consisting substantially of water and formaldehyde. Stream B1 is fed to a second distillation column and distilled at a pressure in the range from 0.2 to 17.5 bar to obtain a product stream C2 consisting substantially of trioxane, and a stream C1 comprising trioxane, water and formaldehyde. Stream C1 is fed to a third distillation column and distilled at a pressure in the range from 1 to 10 bar to obtain the recycle stream D1 comprising trioxane, water and formaldehyde, and a stream D2 consisting substantially of water.

    摘要翻译： 本发明涉及从甲醛制备三恶烷的综合方法，其中在第一步中，将包含水和甲醛的料流A 1和基本上由水和甲醛组成的再循环料流B 2加入到三恶烷合成反应器中，其中 将甲醛转化成三恶烷，得到包含三恶烷，水和甲醛的产物流A 2。 将流A 2和包含三恶烷，水和甲醛的再循环流D 1加入到第一蒸馏塔中，并在0.1-2.5巴的压力下蒸馏，得到富含三恶烷的料流B 1，并且料流B 2 基本上由水和甲醛组成。 将料流B 1加入到第二蒸馏塔中，在0.2至17.5巴的压力下蒸馏，得到基本上由三恶烷组成的产物流C 2和包含三恶烷，水和甲醛的料流C 1。 将料流C 1加入到第三蒸馏塔中并在1至10巴的压力下进行蒸馏以获得包含三恶烷，水和甲醛的再循环流D 1和基本上由水组成的料流D 2。

    Trioxane Production Method Wherein A Side Aqueous Flow Is Deducted At A First Distillation Stage
    13.
    发明申请
    Trioxane Production Method Wherein A Side Aqueous Flow Is Deducted At A First Distillation Stage 失效
    三恶烷生产方法，其中在第一蒸馏阶段扣除侧水流

    公开(公告)号：US20070293689A1

    公开(公告)日：2007-12-20

    申请号：US11665840

    申请日：2005-10-20

    申请人： Markus Siegert ,  Neven Lang ,  Eckhard Stroefer ,  Achim Stammer ,  Thorsten Friese

    发明人： Markus Siegert ,  Neven Lang ,  Eckhard Stroefer ,  Achim Stammer ,  Thorsten Friese

    IPC分类号： C07D323/06

    CPC分类号： C07D323/06

    摘要： Processes are disclosed comprising: (a) reacting an aqueous formaldehyde solution in a reactor in the presence of a suitable catalyst to obtain a reaction product mixture comprising trioxane, formaldehyde and water; (b) distilling the reaction product mixture to form a top stream comprising crude trioxane; and (c) treating the top stream in one or more additional stages to form pure trioxane; wherein an aqueous sidestream is drawn off during the distilling of the reaction mixture.

    摘要翻译： 公开的方法包括：（a）在合适的催化剂存在下使甲醛水溶液在反应器中反应，得到包含三恶烷，甲醛和水的反应产物混合物; （b）蒸馏反应产物混合物以形成包含粗三恶烷的顶流; 和（c）在一个或多个附加阶段处理顶部流以形成纯三恶烷; 其中在蒸馏反应混合物期间抽出水分流。

    Method for separating trioxane from a mixture containing trioxane, formaldehyde and water
    17.
    发明申请
    Method for separating trioxane from a mixture containing trioxane, formaldehyde and water 审中-公开
    从含有三恶烷，甲醛和水的混合物中分离三恶烷的方法

    公开(公告)号：US20070155972A1

    公开(公告)日：2007-07-05

    申请号：US10583696

    申请日：2004-12-21

    申请人： Neven Lang ,  Eckhard Stroefer ,  Achim Stammer ,  Thorsten Friese ,  Markus Siegert ,  Michael Ott ,  Hans Hasse ,  Thomas Grutzner ,  Sergej Blagov

    发明人： Neven Lang ,  Eckhard Stroefer ,  Achim Stammer ,  Thorsten Friese ,  Markus Siegert ,  Michael Ott ,  Hans Hasse ,  Thomas Grutzner ,  Sergej Blagov

    IPC分类号： C07D305/12 ,  C07C41/03

    CPC分类号： C07D323/06 ,  B01D3/146 ,  B01D3/36 ,  Y02P20/127

    摘要： A process for removing trioxane from a mixture I of formaldehyde, trioxane and water, by a) distilling the mixture I in a first distillation stage at a pressure of from 0.1 to 2 bar to obtain a stream II which comprises formaldehyde and a stream III which comprises predominantly trioxane and additionally water and formaldehyde, b) mixing the stream III with a recycle stream VII which comprises predominantly trioxane and additionally water and formaldehyde to obtain a stream IIIa which comprises predominantly trioxane and additionally water and formaldehyde, c) distilling the stream IIIa, if appropriate after removing low boilers from the stream III or IIIa in a further distillation stage, in a second distillation stage at a pressure of from 0.2 to 10 bar, the pressure in the second distillation stage being at least 0.1 bar higher than the pressure in the first distillation stage, to obtain a stream IV of trioxane and a stream V which comprises predominantly trioxane and additionally water and formaldehyde, d) distilling the stream V in a third distillation stage at a pressure of from 0.1 to 4 bar to obtain a stream VI which comprises predominantly water and additionally formaldehyde, and the recycle stream VII which comprises predominantly trioxane and additionally water and formaldehyde, e) if appropriate, distilling the stream VI in a fourth distillation stage to obtain a stream VIII which comprises predominantly water, and a stream IX which comprises predominantly formaldehyde.

    摘要翻译： 一种从甲醛，三恶烷和水的混合物I中除去三恶烷的方法，通过以下步骤a）在0.1至2巴的压力下在第一蒸馏阶段中蒸馏混合物I以获得包含甲醛和流III的流II 主要包含三恶烷，另外还含有水和甲醛，b）将流III与主要包含三恶烷，另外含有水和甲醛的再循环流VII混合，得到主要含有三恶烷，另外含有水和甲醛的流IIIa，c）蒸馏流IIIa 如果适当，则在进一步蒸馏阶段从流III或IIIa除去低锅炉后，在0.2至10巴的压力的第二蒸馏阶段中，第二蒸馏阶段中的压力比压力高至少0.1巴 在第一蒸馏阶段，获得三恶烷的流IV和主要包含三恶烷并另外包含的流V 和d）在0.1至4巴的压力下在第三蒸馏阶段中蒸馏物流V以获得主要包含水和另外甲醛的物流VI，以及主要包含三恶烷和另外的水的再循环流VII，以及 甲醛，e）如果合适，在第四蒸馏阶段中蒸馏物流VI以获得主要包含水的物流VIII和主要包含甲醛的物流IX。

    Process for preparing alkyl esters of (meth)acrylic acid
    18.
    发明申请
    Process for preparing alkyl esters of (meth)acrylic acid 审中-公开
    制备（甲基）丙烯酸的烷基酯的方法

    公开(公告)号：US20060205973A1

    公开(公告)日：2006-09-14

    申请号：US11358220

    申请日：2006-02-22

    申请人： Thorsten Habeck ,  Ulrich Rauh ,  Thorsten Friese ,  Hans Martan

    发明人： Thorsten Habeck ,  Ulrich Rauh ,  Thorsten Friese ,  Hans Martan

    IPC分类号： C07C67/36

    CPC分类号： C07C67/327 ,  C07C67/08 ,  C07C67/54 ,  C07C69/54

    摘要： A process is described for continuously preparing alkyl esters of (meth)acrylic acid by reacting (meth)acrylic acid and alkanols having from 1 to 5 carbon atoms in homogeneous, liquid, solvent-free phase at elevated temperature and in the presence of an acidic esterification catalyst, in which the (meth)acrylic acid, the alkanol and the acidic esterification catalyst are fed to a reaction zone (5, 6), a reaction mixture (21) is discharged from the reaction zone (5, 6), and is introduced into a rectification unit I and separated by addition of water into a top stream (23), comprising the alkyl ester of (meth)acrylic acid, and a bottom stream (22), and a substream of the bottom stream (22) from the rectification unit I is fed to a residue dissociation unit IV, which comprises a dissociating boiler (61), and is separated therein into a top stream (29), which is recycled into the rectification unit I and a bottom stream (40), which is removed from the system, wherein the residue dissociation unit IV, as well as the dissociating boiler (61), further comprises a rectification column (62), the water content of the liquid obtained at the bottommost stage thereof being less than 0.1% by weight.

    摘要翻译： 描述了一种通过使（甲基）丙烯酸和具有1至5个碳原子的链烷醇在均相，液体，无溶剂相中在升高的温度和酸性存在下连续制备（甲基）丙烯酸的烷基酯的方法 酯化催化剂，其中将（甲基）丙烯酸，链烷醇和酸性酯化催化剂加入到反应区（5,6）中，将反应混合物（21）从反应区（5,6）排出， 被引入精馏单元I中，并通过加入包含（甲基）丙烯酸的烷基酯和底部流（22））的顶部流（23）和底部流（22）的分流而分离， 来自精馏单元I的残渣解离单元IV包含解离锅炉（61），并分离成顶部物流（29），其被再循环到精馏单元I和底部流（40）中， ，其从系统中移除，其中 残渣解离单元IV以及解离式锅炉（61）还包括精馏塔（62），其最底部得到的液体的含水量小于0.1重量％。