公开(公告)号：US5981688A

公开(公告)日：1999-11-09

申请号：US159086

申请日：1998-09-23

申请人： Heinz Auer ,  Klaus Beiser ,  Jurgen Ciprian ,  Lothar Franz ,  Wolfgang Franzischka ,  Ulrich-Dieter Pessel ,  Werner Weinle

发明人： Heinz Auer ,  Klaus Beiser ,  Jurgen Ciprian ,  Lothar Franz ,  Wolfgang Franzischka ,  Ulrich-Dieter Pessel ,  Werner Weinle

IPC分类号： B01J19/18 ,  C08G65/20 ,  C08G65/30 ,  C08G65/331 ,  C08G63/00

CPC分类号： B01J19/1862 ,  B01J19/1881 ,  C08G65/20 ,  C08G65/30 ,  C08G65/3312 ,  B01J2219/0025

摘要： A process for preparing hydroxyl-containing polymers and, in particular, a process for preparing polytetrahydrofuran with terminal hydroxyl groups from the corresponding acyloxy-containing polymers by transesterification with alcohols is carried out continuously in at least one stirred vessel, with the foam produced in the transesterification being fed tangentially to a cylindrical container, preferably a cyclone separator, at an adequate velocity to destroy the foam. The liquid phase which separates out is recycled through a line to the at least one stirred vessel.This continuous process is preferably carried out in a cascade of stirred vessels, in which each stirred vessel or a subunit of at least two stirred vessels can in each case be coupled to a cylindrical container, preferably in the form of a cyclone separator.

摘要翻译： 特别是制备含羟基聚合物的方法，特别是通过与醇的酯交换反应，由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的方法在至少一个搅拌容器中连续进行，其中在 酯交换反应以适当的速度切向地进料到圆柱形容器，优选旋风分离器以破坏泡沫。 分离出的液相通过管线再循环至至少一个搅拌容器。 这种连续方法优选在级联的搅拌容器中进行，其中每个搅拌容器或至少两个搅拌容器的亚单位可以在每种情况下联接到圆柱形容器，优选以旋风分离器的形式。

公开(公告)号：US6037381A

公开(公告)日：2000-03-14

申请号：US220776

申请日：1998-12-28

申请人： Wulfrich Friedemann Beer ,  Klaus Beiser ,  Jurgen Ciprian ,  Lothar Franz ,  Wolfgang Franzischka ,  Christof Palm ,  Frank-Friedrich Pape ,  Axel Paul ,  Ulrich-Dieter Pessel ,  Alexander Weck

发明人： Wulfrich Friedemann Beer ,  Klaus Beiser ,  Jurgen Ciprian ,  Lothar Franz ,  Wolfgang Franzischka ,  Christof Palm ,  Frank-Friedrich Pape ,  Axel Paul ,  Ulrich-Dieter Pessel ,  Alexander Weck

IPC分类号： B01J39/04 ,  B01J47/02 ,  B01J49/00 ,  C08G65/20 ,  C08G65/30 ,  C08G65/331 ,  C08J5/20 ,  C08F6/08

CPC分类号： C08G65/3311 ,  B01J39/043 ,  B01J47/026 ,  B01J49/0008 ,  C08G65/20

摘要： The 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 a sodium-containing catalyst. In this process the polytetrahydrofuiran solution is passed in the presence of a catalytic amount of water directly through at least one ion exchanger following the transesterification in order to remove the sodium cations.The novel process makes it possible to remove the sodium cations from the sodium-containing catalyst in an economic manner and with little complexity. The residual sodium content can be reduced to values of less than 0.5 ppm.

摘要翻译： 本发明涉及一种通过在含钠催化剂存在下与醇进行酯交换来制备含羟基聚合物的方法，特别是通过与相应的含酰氧基的聚合物一起制备具有末端羟基的聚四氢呋喃。 在该方法中，聚四氢呋喃溶液在催化量的存在下直接通过至少一个离子交换剂进行酯交换反应以除去钠阳离子。 该新颖的方法使得可以经济地并且几乎没有复杂性从含钠催化剂中除去钠阳离子。 剩余的钠含量可以降低到小于0.5ppm的值。

公开(公告)号：US4912236A

公开(公告)日：1990-03-27

申请号：US231277

申请日：1988-08-12

申请人： Christof Palm ,  Otto H. Huchler ,  Ulrich-Dieter Pessel ,  Erdmann Hollborn ,  Dieter Schmitt

发明人： Christof Palm ,  Otto H. Huchler ,  Ulrich-Dieter Pessel ,  Erdmann Hollborn ,  Dieter Schmitt

IPC分类号： C07D307/08

CPC分类号： C07D307/08

摘要： Crude water-containing tetrahydrofuran is purified by distillation by a process in which the crude tetrahydrofuran is passed through three distillation columns, water being removed from the bottom of the first column, water-containing tetrahydrofuran being recycled from the top of the second column into the first column, the top product of the third column being recycled to the first column, a distillate being removed at the top of the first column, and pure tetrahydrofuran being distilled off from the bottom product of the second column, in the third column, and the pure tetrahydrofuran being removed from the side take-off of the third column.

摘要翻译： 通过蒸馏纯化粗含水四氢呋喃，其中粗四氢呋喃通过三个蒸馏塔，从第一塔的底部除去水，将含水四氢呋喃从第二塔的顶部再循环到 第一塔，第三塔的顶部产物被循环到第一塔，在第一塔的顶部除去的馏出物和在第三塔中从第二塔的底部产物蒸馏出的纯四氢呋喃和 将纯四氢呋喃从第三塔的侧馏分中除去。