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公开(公告)号：US5221731A
公开(公告)日：1993-06-22
申请号：US888942
申请日：1992-05-26
CPC分类号： C08G64/403
摘要： A continuous process for the isolation of polycarbonates from a solution of polycarbonate in methylene chloride at temperatures of 30.degree. to 80.degree. C. is disclosed. The process which yields polycarbonate in powder form having residual solvent content of less than 5% by weight, is characterized in that it entails the following steps:a) obtaining a solution of polycarbonate in methylene chloride containing 10 to 40 percent polycarbonate, said percent being relative to the total weight of the polycarbonate solution,b) mixing into said solution under pressures of 10 to 50 bar and at temperatures of 30.degree. to 50.degree. C. a fluid containing carbon dioxide resulting in a non-gelling polycarbonate/methylene/chloride/dioxide pressurized system, in which between 10 and 12% CO.sub.2 are dissolved,c) mixing said pressurized system in a two-component nozzle with additional fluid containing carbon dioxide under a pressure of 50 to 300 bar and at temperatures of 40.degree. to 150.degree. C., to cause rapid precipitation of polycarbonate in the form of solid particles, the quantitative ratio of CO.sub.2 to solution being between 1.0 and 15, preferably between 2.5 and 8.0,f) separating methylene chloride and carbon dioxide gases in a compressor/condenser system.The process is further characterized in that a time interval of at least 0.1 second separates step b) and step c), and in that the input of the fluid containing carbon dioxide is controlled to prevent gelatin in step b) and in that the pressurized system is above the gelation range in step c).
摘要翻译： 公开了一种在聚碳酸酯从二氯甲烷溶液中分离聚碳酸酯的连续方法，其温度为30℃至80℃。 产生具有小于5重量％的残留溶剂含量的粉末形式的聚碳酸酯的方法的特征在于其需要以下步骤：a）获得聚碳酸酯在含有10-40％聚碳酸酯的二氯甲烷中的溶液，所述百分比为 相对于聚碳酸酯溶液的总重量，b）在10至50巴的压力和30至50℃的温度下将所述溶液混合到含有二氧化碳的流体中，得到非胶凝聚碳酸酯/亚甲基/氯化物 二氧化碳加压系统，其中溶解有10至12％的二氧化碳，c）将所述加压系统混合在双组分喷嘴中，在50至300巴的压力和40至150℃的温度下将含有二氧化碳的另外的流体混合 为了引起固体颗粒形式的聚碳酸酯的快速沉淀，CO 2与溶液的定量比在1.0和15之间，优选在2.5和8.0之间，f）sepa 在压缩机/冷凝器系统中评估二氯甲烷和二氧化碳气体。 该方法的特征还在于，至少0.1秒的时间间隔分离步骤b）和步骤c），并且控制含二氧化碳的流体的输入以防止步骤b）中的明胶，并且加压系统 在步骤c）中的凝胶化范围之上。
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公开(公告)号：US5250658A
公开(公告)日：1993-10-05
申请号：US940566
申请日：1992-09-04
CPC分类号： C08J3/14 , C08G64/403 , C08J2369/00
摘要： According to the invention, a special process for isolating polycarbonate from methylene chloride at temperatures of 30.degree. to 80.degree. C. in the form of a powder with residual solvent contents below 5% by weight is started up as a continuous process by starting up in a two-component nozzle, in which CO.sub.2 -containing fluid and the polymer solution are continuously combined, with a large excess of CO.sub.2 and then allowing the polycarbonate/methylene chloride/CO.sub.2 fluid system to pass through the gel-forming range of the polycarbonate/methylene chloride/CO.sub.2 phase diagram with continuous reduction of the CO.sub.2 throughput to a ratio of CO.sub.2 to organic solution of 4:1 to 2:1. The process started up in this way has a particularly long useful life.
摘要翻译： 根据本发明，通过以30重量％〜80℃的温度从二氯甲烷中分离残留溶剂含量低于5重量％的粉末形式的特殊方法作为连续方法开始，通过在 将含有CO 2的流体和聚合物溶液连续组合的双组分喷嘴与大量过量的CO 2混合，然后使聚碳酸酯/二氯甲烷/ CO 2流体系统通过聚碳酸酯/ 二氧化氯/ CO2相图，将CO 2通量的持续降低至4：1至2：1的CO 2与有机溶液的比例。 以这种方式启动的过程具有特别长的使用寿命。
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公开(公告)号：US5258484A
公开(公告)日：1993-11-02
申请号：US902356
申请日：1992-06-19
CPC分类号： C08G64/24
摘要： A process for the continuous production of a thermoplastic aromatic polycarbonate is disclosed. Accordingly, in a reactor system which includes a tube reactor and a tank equipped with a stirrer, there are reacted a preheated dialkali diphenolate aqueous solution with gaseous phosgene in CH.sub.2 Cl.sub.2 and/or in chlorobenzene solution containing excess phosgene, in a mixer to form a mixed emulsion. The emulsion is then transported at least partly against the force of gravity into the tube reactor to facilitate a polycondensation reaction and in which after a residence time of at least 10 seconds and without dissipation of the heat of reaction there is added a chain terminator. The heat of reaction is dissipated in said tank and aqueous sodium hydroxide and catalyst are added to complete the reaction. The process according to the invention leads to high yields of phosgene.
摘要翻译： 公开了连续生产热塑性芳族聚碳酸酯的方法。 因此，在包括管式反应器和装有搅拌器的罐的反应器系统中，在混合器中使预热的二元醇二酚盐水溶液与气态光气在CH 2 Cl 2中和/或含有过量光气的氯苯溶液中反应，形成混合 乳液。 然后将乳液至少部分地抵抗重力输送到管式反应器中以促进缩聚反应，并且其中在至少10秒的停留时间之后并且不消耗反应热量时，添加了链终止剂。 在所述槽中消散反应热，加入氢氧化钠水溶液和催化剂以完成反应。 根据本发明的方法导致高产率的光气。
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公开(公告)号：US5412060A
公开(公告)日：1995-05-02
申请号：US189382
申请日：1994-01-31
申请人： Claus Wulff , Uwe Hucks , Rolf Bachmann , Gunther Weymans , Jurgen Kadelka , Wolfgang Herrig
发明人： Claus Wulff , Uwe Hucks , Rolf Bachmann , Gunther Weymans , Jurgen Kadelka , Wolfgang Herrig
CPC分类号： C08G64/24
摘要： The invention relates to a process for the production of polycarbonates by the two-phase interfacial method in which deviations between measured and estimated variables are continuously minimized by means of a suitably selected observer or filter system on the basis of a process model with an empirical Mark-Houwink relation adapted to the process. The variables estimated by the observer/filter are converted into control variables which are used to set input streams of the production process. Product quality is kept constant, changes in load or set values are quickly intercepted and even disturbances not readily accessible to measurement are taken into account by the process control.
摘要翻译： 本发明涉及通过两相界面方法生产聚碳酸酯的方法，其中通过适当选择的观察者或过滤系统，在经验标记的过程模型的基础上，将测量值和估计变量之间的偏差连续最小化 -Houwink关系适应过程。 由观察者/过滤器估计的变量被转换为用于设置生产过程的输入流的控制变量。 产品质量保持不变，负载或设定值的变化被快速截断，并且通过过程控制考虑到测量中不容易获得的均匀干扰。
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公开(公告)号：US5314990A
公开(公告)日：1994-05-24
申请号：US692496
申请日：1991-04-29
申请人： Ulrich Jansen , Karl-Heinz Ott , Wolfgang Herrig , Otto Koch , Alfred Pischtschan , Dieter Wittmann
发明人： Ulrich Jansen , Karl-Heinz Ott , Wolfgang Herrig , Otto Koch , Alfred Pischtschan , Dieter Wittmann
CPC分类号： C08F6/22
摘要： A process for the continuous processing of vinyl polymer latices to produce thermoplastically processible vinyl polymer powder by coagulating a stream of a vinyl polymer latex by the addition of a stream of a coagulant with intensive mixing and shearing in a cascade of vessels at an average residence time per vessel of 10 to 60 minutes and at temperatures from 50 to 120.degree. C., volatile auxiliary substances and residual monomers in the polymer being optionally removed by steam distillation and part of the serum separated from the vinyl polymer being added to the stream of coagulant.
摘要翻译： 一种连续处理乙烯基聚合物胶乳以通过凝结乙烯基聚合物胶乳物流的方式连续处理乙烯基聚合物胶乳的方法，该方法是通过在凝结剂流中加入混合物并在平均停留时间的梯级下进行剪切 每个容器10至60分钟，温度为50至120℃，通过蒸汽蒸馏任选除去聚合物中的挥发性辅助物质和残留单体，并将部分从乙烯基聚合物中分离的血清加入到凝结剂流中 。
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公开(公告)号：US5508375A
公开(公告)日：1996-04-16
申请号：US376158
申请日：1995-01-20
申请人： Uwe Hucks , Jurgen Kadelka , Wolfgang Herrig
发明人： Uwe Hucks , Jurgen Kadelka , Wolfgang Herrig
CPC分类号： G11B7/2534 , C08G64/24
摘要： The present invention relates to a process for the preparation of polycarbonates in which an oil-in-water emulsion is maintained throughout by employing special reaction conditions.
摘要翻译： 本发明涉及一种制备聚碳酸酯的方法，其中通过采用特殊的反应条件保持水包油乳液。
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公开(公告)号：US5376741A
公开(公告)日：1994-12-27
申请号：US150667
申请日：1993-11-10
申请人： Wolfgang Herrig , Jurgen Kadelka , Uwe Hucks
发明人： Wolfgang Herrig , Jurgen Kadelka , Uwe Hucks
摘要： The present invention relates to a process for the preparation of polycarbonates in which an oil-in-water emulsion is maintained throughout by carrying out the reaction under special conditions.
摘要翻译： 本发明涉及一种制备聚碳酸酯的方法，其中通过在特殊条件下进行反应来保持水包油乳液。
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