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公开(公告)号:US06583327B2
公开(公告)日:2003-06-24
申请号:US10032760
申请日:2001-10-26
申请人: Ralf Demuth , Frank Döbert , Harald Petersen , Georg Ronge , Hans-Martin Weber , Thomas Würminghausen , Eberhard Zirngiebl
发明人: Ralf Demuth , Frank Döbert , Harald Petersen , Georg Ronge , Hans-Martin Weber , Thomas Würminghausen , Eberhard Zirngiebl
IPC分类号: C07C20500
CPC分类号: C07C201/08 , C07C205/06
摘要: The present invention relates to a process for the continuous isothermal preparation of mononitrotoluenes with concentration of the resultant waste sulfuric acid and recycling of the concentrated waste sulfuric acid to the process.
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公开(公告)号:US06441254B1
公开(公告)日:2002-08-27
申请号:US10017816
申请日:2001-12-13
申请人: Frank Döbert , Paul Wagner , Alexander Klausener , Wolfgang Eymann , Rolf Feller
发明人: Frank Döbert , Paul Wagner , Alexander Klausener , Wolfgang Eymann , Rolf Feller
IPC分类号: C07C3118
摘要: The present invention relates to a process for preparing trimethylol compounds and formic acid by reaction of formaldehyde and aldehydes in the presence of a nitrogen base and distillation of the resulting reaction mixture in the presence of an auxiliary.
摘要翻译: 本发明涉及通过甲醛和醛在氮气存在下反应制备三羟甲基化合物和甲酸的方法,并在辅助剂存在下蒸馏所得的反应混合物。
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公开(公告)号:US06207010B1
公开(公告)日:2001-03-27
申请号:US09585224
申请日:2000-06-01
申请人: Torsten Groth , Winfried Joentgen , Paul Wagner , Frank Döbert , Eckhard Wenderoth , Thomas Roick
发明人: Torsten Groth , Winfried Joentgen , Paul Wagner , Frank Döbert , Eckhard Wenderoth , Thomas Roick
IPC分类号: D21C320
CPC分类号: D21C9/1089 , C07C227/06 , D21C9/1042 , D21C9/163 , C07C229/24
摘要: A process for the preparation of iminodisuccinic acid alkali metal salts by reaction of maleic acid and ammonia in an aqueous medium in the presence of alkali metal hydroxides and working up thereof.
摘要翻译: 一种在碱金属氢氧化物存在下通过马来酸和氨在水介质中反应制备亚氨基二琥珀酸碱金属盐的方法及其加工。
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公开(公告)号:US06187898B1
公开(公告)日:2001-02-13
申请号:US09367457
申请日:1999-08-13
申请人: Paul Wagner , Frank Döbert , Thomas Menzel , Torsten Groth , Winfried Joentgen , Ulrich Liesenfelder , Jörgen Weinschenck , Klaus-Peter Heise
发明人: Paul Wagner , Frank Döbert , Thomas Menzel , Torsten Groth , Winfried Joentgen , Ulrich Liesenfelder , Jörgen Weinschenck , Klaus-Peter Heise
IPC分类号: C08G6904
CPC分类号: C08G73/0611
摘要: The invention relates to a method for carrying out polycondensation reactions, according to which the polycondensation of a monomeric starting material is carried out with external supply of heat in a reactor combination which has at least two stages and is composed of a pre-reactor and a high-viscosity reactor, where the low-molecular-weight elimination products produced are removed by evaporation. In the pre-reactor, the reaction product is concentrated to give a high-viscosity preliminary product. The high-viscosity preliminary product is then fed to the high-viscosity reactor, in which it reacts to completion with simultaneous introduction of thermal and mechanical energy and with a residence time of from 20 s to 60 min to give a polycondensation product.
摘要翻译: 本发明涉及一种进行缩聚反应的方法,根据该方法,单体原料的缩聚是在具有至少两个阶段的反应器组合中进行外部供热,并由预反应器和 通过蒸发除去生成的低分子量消除产物的高粘度反应器。 在预反应器中,将反应产物浓缩,得到高粘度的初步产物。 然后将高粘度的初步产物进料到高粘度反应器中,其中反应完成,同时引入热和机械能,停留时间为20秒至60分钟,得到缩聚产物。
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