公开(公告)号：US06300467B1

公开(公告)日：2001-10-09

申请号：US09445993

申请日：2000-03-29

申请人： Heinz Auer ,  Jürgen Ciprian ,  Lothar Franz ,  Wolfgang Franzischka ,  Gabriele Iffland ,  Alexander Weck ,  Werner Weinle

发明人： Heinz Auer ,  Jürgen Ciprian ,  Lothar Franz ,  Wolfgang Franzischka ,  Gabriele Iffland ,  Alexander Weck ,  Werner Weinle

IPC分类号： C08F600

CPC分类号： C08G65/30 ,  C08G65/20 ,  C08G65/3312

摘要： The present invention relates to a process for preparing hydroxyl-containing polymers, in particular for preparing polytetrahydrofuran with terminal hydroxyl groups, from the corresponding acyloxy-containing polymers by transesterification with alcohols in the presence of an alkali metal- or alkaline earth metal-containing catalyst, which entails the appropriate acyloxy-containing polymer being introduced together with the alcohol and the catalyst into a first prereactor (I) and converted therein at least partly to the hydroxyl-containing polymer, and the reaction solution being fed into the upper zone (IIa) of a distillation column (II) into whose lower zone (IIb) alcohol in vapor phase is additionally fed. This involves a phase exchange at the coherent and the disperse phase at the transition from the prereactor to the distillation column. Preferably, in addition to the first prereactor, a further 3 prereactors are used which serve as holdup reactors.

摘要翻译： 本发明涉及一种制备含羟基聚合物的方法，特别是通过在含碱金属或碱土金属的催化剂存在下与醇进行酯交换从相应的含酰氧基的聚合物制备具有末端羟基的聚四氢呋喃 ，其使得适当的含酰氧基的聚合物与醇和催化剂一起引入第一预反应器（I）中并在其中至少部分地转化为含羟基聚合物，并将反应溶液进料到上部区域（IIa ）蒸馏塔（II），其中进一步加入气相中的低级（IIb）醇。 这涉及在从预反应器到蒸馏塔的过渡处的相干和分散相的相交换。 优选地，除了第一预反应器之外，还使用用作保持反应器的另外3个预反应器。

公开(公告)号：US06265592B1

公开(公告)日：2001-07-24

申请号：US09674281

申请日：2000-10-30

申请人： Stefan Birnbach ,  Toni Dockner ,  Jürgen Mohr ,  Regina Benfer ,  Walter Bieg ,  Jarren Peters ,  Bernd Ruge ,  Werner Weinle ,  Peter Zehner

发明人： Stefan Birnbach ,  Toni Dockner ,  Jürgen Mohr ,  Regina Benfer ,  Walter Bieg ,  Jarren Peters ,  Bernd Ruge ,  Werner Weinle ,  Peter Zehner

IPC分类号： C07D31768

CPC分类号： C07D317/36 ,  C07D317/38

摘要： A process for the continuous production of 1,3-dioxolan-2-ones such as ethylene carbonate or propylene carbonate by reacting a corresponding oxirane with carbon dioxide in the liquid phase in the presence of a catalyst comprises conducting the reaction in a two-part reactor in whose first part the reaction is taken with backmixing to a conversion of not less than 80% of the oxirane II and in whose second part the reaction is completed under nonbackmixing conditions, and passing the carbon dioxide in countercurrent to the oxirane II in the entire reactor.

摘要翻译： 在催化剂存在下，使相应的环氧乙烷与二氧化碳在液相中反应，连续生产1,3-二氧戊环-2-酮如碳酸亚乙酯或碳酸亚丙酯的方法包括将反应进行两部分 反应器，其第一部分反应采用回混至不少于80％的环氧乙烷II的转化率，其第二部分反应在非回流条件下完成，并使二氧化碳与环氧乙烷II逆流通过 整个反应堆。