公开(公告)号：US06506281B1

公开(公告)日：2003-01-14

申请号：US09719891

申请日：2001-03-02

申请人： Clemens Casper ,  Jörgen Weinschenck ,  Klemens Kohlgrüber ,  Jürgen Heuser ,  Christian Kords ,  Thomas Elsner

发明人： Clemens Casper ,  Jörgen Weinschenck ,  Klemens Kohlgrüber ,  Jürgen Heuser ,  Christian Kords ,  Thomas Elsner

IPC分类号： B01D122

CPC分类号： B01D3/06 ,  C08G64/406 ,  Y10S159/08 ,  Y10S159/10

摘要： A process of evaporating a viscous polymer solution is described. The process includes: (a) providing a viscous polymer solution including at least 30 wt. % of solvents and monomers; (b) introducing the viscous polymer solution into a heated helix (5), the heated helix having a vapor exit velocity of 200 to 300 m/s, (a film flow including a two-phase mixture of polymer melt, and solvent vapors and monomer vapors being formed within the helix); (c) forwarding the film flow from helix (5) into a heated vapor separator (6); (d) expanding the two-phase mixture of polymer melt, and solvent vapors and monomer vapors of the film flow within vapor separator (6) at an absolute pressure of 10 mbar to 800 mbar, (a bottom product including a concentrated melt of the polymer is formed within the vapor separator); and (e) withdrawing the bottom product from vapor separator (6). Each of the helix (5) and vapor separator (6) have a separate heating device, and each of heating device independently provides a temperature that is above the softening point of the polymer.

摘要翻译： 描述蒸发粘性聚合物溶液的方法。 该方法包括：（a）提供粘性聚合物溶液，其包含至少30wt。 ％的溶剂和单体; （b）将粘性聚合物溶液引入加热的螺旋（5）中，加热的螺旋具有200-300m / s的蒸气出口速度（包括聚合物熔体和溶剂蒸气的两相混合物的膜流和 单体蒸气在螺旋内形成）; （c）将膜流从螺旋（5）转移到加热的蒸气分离器（6）中; （d）在10毫巴至800毫巴的绝对压力下，将蒸气分离器（6）内的聚合物熔体和溶剂蒸气和单体蒸气的溶剂蒸气和单体蒸气膨胀（包括含有 聚合物形成在蒸气分离器内）; 和（e）从蒸气分离器（6）中取出底部产物。 螺旋（5）和蒸汽分离器（6）中的每一个具有单独的加热装置，并且每个加热装置独立地提供高于聚合物软化点的温度。

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。