公开(公告)号：US20050020848A1

公开(公告)日：2005-01-27

申请号：US10503005

申请日：2002-02-15

申请人： Jan Bredehoft ,  Hans-Jurgen Pallasch ,  Ludwig Heck ,  Eckhard Strofer

发明人： Jan Bredehoft ,  Hans-Jurgen Pallasch ,  Ludwig Heck ,  Eckhard Strofer

IPC分类号： B01D1/30 ,  B01D3/32 ,  B60P1/28 ,  C07C263/10 ,  C07C265/14

CPC分类号： C07C263/10 ,  B01D3/322 ,  C07C265/14

摘要： An arrangement for carrying out chemical reactions comprises at least one distillation column and/or at least one container and at least one circulation evaporator, which are connected to one another via connecting elements, liquid being taken off completely or partly from a tray or from a stacked packing bed or from a dumped packing bed or from a liquid collector of the distillation column or being fed as an external feed stream below the lower tube sheet of the circulation evaporator to said evaporator.

摘要翻译： 用于进行化学反应的装置包括至少一个蒸馏塔和/或至少一个容器和至少一个循环蒸发器，所述至少一个循环蒸发器通过连接元件彼此连接，液体完全或部分地从托盘或从托盘 堆叠的填料床或来自倾倒的填料床或来自蒸馏塔的液体收集器，或者作为外部进料流供给到循环蒸发器的下管板下方到所述蒸发器。

公开(公告)号：US20050176973A1

公开(公告)日：2005-08-11

申请号：US10514490

申请日：2003-05-13

申请人： Katrin Friese ,  Matthias Rauls ,  Reinhard Freyhof ,  Thorsten Friese ,  Harald Armbruster ,  Hartmut Zeiner ,  Gitta Egbers ,  Eckhard Strofer ,  Ludwig Heck ,  Peter Hildenbrand

发明人： Katrin Friese ,  Matthias Rauls ,  Reinhard Freyhof ,  Thorsten Friese ,  Harald Armbruster ,  Hartmut Zeiner ,  Gitta Egbers ,  Eckhard Strofer ,  Ludwig Heck ,  Peter Hildenbrand

IPC分类号： C07D323/06

CPC分类号： C07D323/06

摘要： A process for preparing trioxane by trimerization of formaldehyde in aqueous acidic solution and subsequently removing trioxane from a mixture substantially comprising trioxane, water and formaldehyde (crude trioxane product), which comprises a) distilling the crude trioxane product from the trimerization, b) crystallizing the trioxane out and c) removing it from the mother liquor and d) subsequently melting it and e) distilling off further by-products.

摘要翻译： 一种通过在酸性水溶液中三聚甲醛制备三恶烷并随后从基本上包含三恶烷，水和甲醛（粗三恶烷产物）的混合物中除去三恶烷的方法，该方法包括：a）将粗三恶烷产物从三聚反应中蒸馏，b）使 三氧化硅，c）将其从母液中除去，d）随后熔化，e）蒸馏出进一步的副产物。

公开(公告)号：US20070112225A1

公开(公告)日：2007-05-17

申请号：US10580685

申请日：2005-10-27

申请人： Tilman Sirch ,  Gerd-Dieter Tebben ,  Ludwig Heck ,  Armin Diefenbacher ,  Alfred Krause ,  Franz Borgel

发明人： Tilman Sirch ,  Gerd-Dieter Tebben ,  Ludwig Heck ,  Armin Diefenbacher ,  Alfred Krause ,  Franz Borgel

IPC分类号： C07C31/18

CPC分类号： B01D61/025 ,  C07C29/149 ,  C07C31/20

摘要： The present invention provides a process for preparing 1,6-hexanediol from a carboxylic acid mixture which comprises adipic acid, 6-hydroxycaproic acid and small amounts of 1,4-cyclohexanediols and is obtained as a by-product in the oxidation of cyclohexane to cyclohexanone/cyclohexanol with oxygen or oxygen-containing gases and by water extraction of the reaction mixture, by esterification of the acids and hydrogenation, in which a) the mono- and dicarboxylic acids present in the aqueous dicarboxylic acid mixture are reacted with a low molecular weight alcohol to give the corresponding carboxylic esters, b) the resulting esterification mixture is freed of excess alcohol and low boilers in a first distillation stage, c) a separation of the bottom product is carried out in a second distillation stage into an ester fraction substantially free of 1,4-cyclohexanediols and a fraction comprising at least the majority of the 1,4-cyclohexanediols, d) the ester fraction substantially free of 1,4-cyclohexanediols is catalytically hydrogenated and e) 1,6-hexanediol is obtained in a purifying distillation stage from the hydrogenation effluent while removing an alcohol-low boiler mixture in a manner known per se, wherein alcohol is removed by a membrane system from the mixtures, obtained after the esterification in stage b) and/or after the hydrogenation in stage e), of alcohols and low boilers and recycled into the esterification.