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49 条记录 (耗时 0.018 秒)

    Process for the production of polycarbonate
    32.
    发明授权
    Process for the production of polycarbonate 失效
    聚碳酸酯生产工艺

    公开(公告)号：US5258484A

    公开(公告)日：1993-11-02

    申请号：US902356

    申请日：1992-06-19

    申请人： Reinhard Schomacker ,  Uwe Hucks ,  Gunther Weymans ,  Wolfgang Herrig ,  Jurgen Kirsch

    发明人： Reinhard Schomacker ,  Uwe Hucks ,  Gunther Weymans ,  Wolfgang Herrig ,  Jurgen Kirsch

    IPC分类号： C08G64/22 ,  C08G64/24

    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。

    Method for the separate discharge of the individual phase streams of a multiple phase flow
    35.
    发明授权
    Method for the separate discharge of the individual phase streams of a multiple phase flow 失效
    分离排放多相流的各相流的方法

    公开(公告)号：US4312642A

    公开(公告)日：1982-01-26

    申请号：US126267

    申请日：1980-03-03

    申请人： Gunter Lehr ,  Karl-Dieter Lohr ,  Uwe Hucks ,  Hugo Vernaleken

    发明人： Gunter Lehr ,  Karl-Dieter Lohr ,  Uwe Hucks ,  Hugo Vernaleken

    IPC分类号： B29C48/76 ,  B01D19/00

    CPC分类号： B29C47/76 ,  B29C47/0009 ,  B29C47/766

    摘要： A method for the separate discharge of the individual phase streams of a multiple component flow comprising a high viscosity slow flowing liquid or suspension and a gas flowing at at least 100 times faster with the volumetric ratio of the gas to the liquid being greater than 1:1. The multicomponent flow is transversely fed through an inlet and directly into a rotating helical channel for conveying liquid in one direction. The channel has a liquid outlet spaced from the inlet in the one direction and a gas outlet spaced from the inlet in the opposite direction. A gas shut-off is formed between the inlet and the liquid outlet so as to effect the discharge of gas through the gas outlet in the opposite direction during the conveying of the liquid by the helical channel to the liquid outlet in the one direction.

    摘要翻译： 一种用于单独排放多组分流的单个相流的方法，其包括高粘度慢流动的液体或悬浮液和以至少100倍的速度流动的气体，其中气体与液体的体积比大于1： 1。 多组分流被横向地通过入口进料并直接进入用于在一个方向上输送液体的旋转螺旋通道。 通道具有在一个方向上与入口间隔开的液体出口和在相反方向上与入口间隔开的气体出口。 在入口和液体出口之间形成气体切断，以便在将液体通过螺旋通道沿一个方向输送到液体出口时，在相反方向上实现气体通过气体出口的排出。

    Transesterification process for the production of polycarbonates having a low content of volatile compounds
    39.
    发明授权
    Transesterification process for the production of polycarbonates having a low content of volatile compounds 有权
    用于生产挥发性化合物含量低的聚碳酸酯的酯交换方法

    公开(公告)号：US07279544B2

    公开(公告)日：2007-10-09

    申请号：US11002866

    申请日：2004-12-02

    申请人： Uwe Hucks ,  Melanie Möthrath ,  Helmut-Werner Heuer ,  Thomas König ,  Lydia Simon ,  Marc Buts ,  Johan Vanden Eynde

    发明人： Uwe Hucks ,  Melanie Möthrath ,  Helmut-Werner Heuer ,  Thomas König ,  Lydia Simon ,  Marc Buts ,  Johan Vanden Eynde

    IPC分类号： C08G64/00

    CPC分类号： C08G64/307

    摘要： A multi stage process for the production of polycarbonates having low monomer content is disclosed. The process entails, in sequence, (i) transesterifying in the melt at least one dihydroxyaryl compound with at least one diaryl carbonate in the presence of at least one onium catalyst to produce a polycondensate that contains monomers, (ii) introducing into the polycondensate an inhibitor in an hypostoichiometric amount in relation to the catalyst and (iii) reducing in a finishing reactor the content of monomers in said polycondensate. The polycarbonate thus produced is characterized in that it contains less than 350 ppm of diphenyl carbonate, less than 40 ppm of 2,2-bis-(4-hydroxyphenyl)propane and less than 150 ppm of phenol.

    摘要翻译： 公开了一种生产具有低单体含量的聚碳酸酯的多阶段方法。 该方法按顺序进行，（i）在至少一种鎓催化剂的存在下，使至少一种二羟基芳基化合物与至少一种碳酸二芳基酯在至少一种二羟基芳基化合物中酯交换以产生含有单体的缩聚物，（ii）将所述缩聚物引入到缩聚物中 抑制剂相对于催化剂的低化学计量量，和（iii）在精整反应器中还原所述缩聚物中单体的含量。 如此生产的聚碳酸酯的特征在于其含有少于350ppm的碳酸二苯酯，小于40ppm的2,2-双 - （4-羟基苯基）丙烷和小于150ppm的苯酚。