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49 条记录 (耗时 0.04 秒)

    Process for producing oligocarbonates
    1.
    发明授权
    Process for producing oligocarbonates 有权
    生产寡聚碳酸酯的方法

    公开(公告)号：US06835797B2

    公开(公告)日：2004-12-28

    申请号：US10103921

    申请日：2002-03-22

    申请人： Uwe Hucks ,  Rolf Bachmann ,  Franz Ferdinand Rhiel ,  Thomas Fischer ,  Silke Kratschmer

    发明人： Uwe Hucks ,  Rolf Bachmann ,  Franz Ferdinand Rhiel ,  Thomas Fischer ,  Silke Kratschmer

    IPC分类号： C08G6400

    CPC分类号： C08G64/307

    摘要： A continuous process for producing oligocarbonate is disclosed. The process entails in sequence the steps of a) reacting a dihydroxyaryl compound with a diaryl carbonate in the presence of a catalyst to obtain a melt and avoiding removal of released monohydroxyaryl compound and b) withdrawing the monohydroxyaryl compound by flash evaporation and c) heating the melt obtained under vacuum in an evaporator equipped with sump receiver and d) repeating at least once steps b) and then c) each at gradually increased temperatures and lowered pressures.

    摘要翻译： 公开了连续生产低聚碳酸酯的方法。 该方法按照以下步骤进行：a）在催化剂存在下使二羟基芳基化合物与碳酸二芳基酯反应，得到熔体，避免去除脱离的单羟基芳基化合物，和b）通过闪蒸蒸发除去单羟基芳基化合物，和c）加热 在装有贮槽接收器的蒸发器中在真空下获得熔体，d）重复至少一次步骤b），然后c）逐渐升高温度和降低的压力。

    Method for producing phosphonium phenolates
    3.
    发明授权
    Method for producing phosphonium phenolates 有权
    苯酚酚盐生产方法

    公开(公告)号：US06476273B2

    公开(公告)日：2002-11-05

    申请号：US09446475

    申请日：1999-12-21

    申请人： Annett König ,  Lothar Bunzel ,  Uwe Hucks

    发明人： Annett König ,  Lothar Bunzel ,  Uwe Hucks

    IPC分类号： C07F954

    CPC分类号： C07F9/54 ,  C07C37/00 ,  C07C39/04

    摘要： A process for preparing phosphonium phenolate is disclosed. The process entails a reaction of phosphonium halide with phenol in an aqueous alkaline solution at a temperature of 0 to 55° C. The molar ratio of phenol to phosphonium halide is between 2:1 to 10:1 and the pH of the solution is 9.5 to 11. An optional embodiment entails carrying out the reaction in the further presence of alcohol.

    摘要翻译： 公开了一种制备酚酞的方法。 该方法需要在0至55℃的温度下在碱性水溶液中将卤化鏻与酚反应。苯酚与卤化鏻的摩尔比为2:1至10:1，溶液的pH为9.5 任选的实施方案需要在醇的进一步存在下进行反应。

    Transesterification process for the production of polycarbonates having a low content of volatile compounds
    8.
    发明申请
    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：US20050131197A1

    公开(公告)日：2005-06-16

    申请号：US11002866

    申请日：2004-12-02

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

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

    IPC分类号： C08G64/00 ,  C08G64/04 ,  C08G64/06 ,  C08G64/14 ,  C08G64/20 ,  C08G64/30 ,  C08G64/40

    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。

    Process for producing polycarbonate
    9.
    发明授权
    Process for producing polycarbonate 有权
    生产聚碳酸酯的方法

    公开(公告)号：US06703473B2

    公开(公告)日：2004-03-09

    申请号：US10038953

    申请日：2002-01-02

    申请人： Uwe Hucks ,  Kaspar Hallenberger ,  Silke Kratschmer ,  Michael Prein ,  Steffen Kühling

    发明人： Uwe Hucks ,  Kaspar Hallenberger ,  Silke Kratschmer ,  Michael Prein ,  Steffen Kühling

    IPC分类号： C08G6400

    CPC分类号： C08G64/406 ,  C08G64/307

    摘要： An improvement to the melt transesterification reaction of diaryl carbonate with dihydroxy aryl compound is disclosed. The improvement entails the following steps (i) introducing the resulting vapor stream at the mid-height of a first distillation column, and (ii) separating the vapor stream into a top product containing high purity monohydroxy aryl compound and a first bottom product, and (iii) recycling the high purity monohydroxy aryl compound of (ii) to the reaction, and (iv) introducing the first bottom product at mid-height of a second distillation column, and (v) separating said first bottom product into high boiling bottom by-product and overhead remaining constituents, and (vi) introducing the overhead remaining constituents at mid-height of a third distillation column, and (vii) separating said overhead remaining constituents into overhead low-boiling fractions and bottom or product side stream that contains diaryl carbonate product, and (viii) recycling the diaryl carbonate product directly to the transesterification reaction.

    摘要翻译： 公开了碳酸二芳酯与二羟基芳基化合物的熔融酯交换反应的改进。 改进需要以下步骤：（i）将所得蒸汽流引入第一蒸馏塔的中间高度，和（ii）将蒸汽流分离成含有高纯度单羟基芳基化合物和第一底部产物的顶部产物，以及 （iii）将（ii）的高纯度单羟基芳基化合物再循环到反应中，和（iv）在第二蒸馏塔的中间部分引入第一底部产物，和（v）将所述第一底部产物分离成高沸点底部 副产物和塔顶残留组分，和（vi）在第三蒸馏塔的中间高度引入塔顶剩余成分，和（vii）将塔顶剩余组分分离成塔顶低沸点馏分和底部或产物侧流，其含有 碳酸二芳基酯产物，和（viii）将碳酸二芳基酯产物直接再循环到酯交换反应中。

    Method for producing branched polycarbonates
    10.
    发明授权
    Method for producing branched polycarbonates 失效
    支链聚碳酸酯的制备方法

    公开(公告)号：US06307006B1

    公开(公告)日：2001-10-23

    申请号：US09445849

    申请日：1999-12-14

    申请人： Annett König ,  Lothar Bunzel ,  Uwe Hucks

    发明人： Annett König ,  Lothar Bunzel ,  Uwe Hucks

    IPC分类号： C08G6400

    CPC分类号： C08G64/1616 ,  C08G64/30

    摘要： A process of producing branched polycarbonates by melt transesterification from at least one diphenol, diaryl carbonate and a branching agent, and in the optional presence of a catalyst is disclosed. The process which is carried out at temperatures between 80 to 400° C. and at pressures between 1 and 0.01 mbar, entails using as branching agent at least one member selected from the group consisting of (i) a specifically structured aliphatic alcohol and (ii) the ether of (i) which is formed by self-condensation.

    摘要翻译： 公开了通过熔融酯交换从至少一种二酚，碳酸二芳酯和支化剂生产支化聚碳酸酯的方法，以及任选的催化剂存在下的方法。 在80至400℃的温度和1至0.01毫巴的压力下进行的方法需要使用至少一种选自（i）特定结构的脂族醇和（ii） ）通过自缩合形成的（i）的醚。