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公开(公告)号：US06838543B2
公开(公告)日：2005-01-04
申请号：US10433252
申请日：2001-11-08
申请人： Rudolf Kaempf , Fritz Wilhelm
发明人： Rudolf Kaempf , Fritz Wilhelm
CPC分类号： C08G64/30 , C08G64/205
摘要： Polycarbonates are produced by reacting a monomeric carbonate component with at least one diphenol or dialcohol in the presence of a transesterification catalyst, wherein the molten component is mixed with the transesterification catalyst by stirring and a transesterification product is produced, which is polycondensated. For polycondensation, the transesterification product is passed through a preliminary reactor, at least one intermediate reactor and one final reactor, the reactors being connected in series and having a substantially horizontal driven shaft with stirrers attached thereto. It is ensured that in the preliminary reactor and in the final reactor a dwell time of the melt of 5 minutes to 2 hours is maintained, that the temperatures in the preliminary reactor are maintained in the range from 220 to 300° C. and in the final reactor in the range from 240 to 350° C., and that the pressure in the preliminary reactor is maintained in the range from 100 to 800 mbar and in the final reactor in the range from 0.1 to 50 mbar.
摘要翻译： 聚碳酸酯通过在酯交换催化剂存在下使单体碳酸酯组分与至少一种二酚或二醇反应制备，其中熔融组分通过搅拌与酯交换催化剂混合，并产生缩聚产生的酯交换产物。 对于缩聚，酯交换产物通过预反应器，至少一个中间反应器和一个最终反应器，反应器串联连接并且具有基本上水平的驱动轴，连接有搅拌器。 确保在预备反应器和最终反应器中保持熔融物的停留时间为5分钟至2小时，预备反应器中的温度保持在220-300℃的范围内，并且在 最终反应器的温度范围为240至350℃，并且预反应器中的压力保持在100至800毫巴的范围内，最终反应器中的压力保持在0.1至50毫巴范围内。
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公开(公告)号：US5576414A
公开(公告)日：1996-11-19
申请号：US539733
申请日：1995-10-05
申请人： Fritz Wilhelm , Rudolf Kaempf , Walter Wenzel , Klaus Mackensen
发明人： Fritz Wilhelm , Rudolf Kaempf , Walter Wenzel , Klaus Mackensen
CPC分类号： C08G64/307 , C08G64/20
摘要： Process for generating a vacuum and separating the condensable components of the vapors of melt-phase polycondensation in the production of polycarbonate, where at least one or two vapor jets with a downstream spray condenser are connected to the intake side of the polycondensation reactor to be evacuated, and the motive vapor is diphenyl carbonate vapor, and the spray liquid is liquid diphenyl carbonate.
摘要翻译： 用于在聚碳酸酯生产中产生真空并分离熔融相缩聚蒸气的可冷凝组分的方法，其中至少一个或两个具有下游喷雾冷凝器的蒸气喷射器连接到待抽真空的缩聚反应器的进气侧 ，动力蒸气为碳酸二苯酯蒸气，喷雾液为碳酸二苯酯。
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公开(公告)号：US5563209A
公开(公告)日：1996-10-08
申请号：US568874
申请日：1995-12-07
CPC分类号： C08G63/916
摘要： A process for the reduction of the carboxyl end groups of linear polyester through reaction with alkylene carbonate in the melt phase in the presence of 40 to 160 ppm of allyltriphenyl phosphonium bromide, based on the weight of the polyester.
摘要翻译： 在40至160ppm的烯丙基三苯基溴化鏻存在下，基于聚酯的重量，通过在熔融相中与碳酸亚烷酯反应来还原直链聚酯的羧基端基的方法。
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