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    Transesterification process for the production of polycarbonates having a low content of volatile compounds
    3.
    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。

    Transesterification process for the production of polycarbonates having a low content of volatile compounds
    4.
    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。

    PROCESS FOR THE PRODUCTION OF DIARYL CARBONATES AND TREATMENT OF ALKALICHLORIDE SOLUTIONS RESULTING THEREFROM
    10.
    发明申请
    PROCESS FOR THE PRODUCTION OF DIARYL CARBONATES AND TREATMENT OF ALKALICHLORIDE SOLUTIONS RESULTING THEREFROM 审中-公开
    生产二氧化碳的方法和治疗其结果的碱性溶液

    公开(公告)号：US20080053836A1

    公开(公告)日：2008-03-06

    申请号：US11849542

    申请日：2007-09-04

    申请人： Andreas Bulan ,  Pieter Ooms ,  Rainer Weber ,  Johann Rechner ,  Marc Buts ,  Johan Vanden Eynde

    发明人： Andreas Bulan ,  Pieter Ooms ,  Rainer Weber ,  Johann Rechner ,  Marc Buts ,  Johan Vanden Eynde

    IPC分类号： C25B3/02

    CPC分类号： C25B1/34 ,  C01D3/04 ,  C01D3/06 ,  C07C68/02 ,  C07C69/96

    摘要： Processes comprising: (a) reacting phosgene and a monohydroxyl aryl compound in the presence of a suitable catalyst to form a diaryl carbonate and a solution comprising an alkali chloride; (b) separating the diaryl carbonate from the solution; (c) adjusting the pH of the solution to a value of less than or equal to 8 to form a pH-adjusted solution; (d) treating the pH-adjusted solution with an adsorbent to form a treated solution; (e) subjecting at least a portion of the treated solution to electrochemical oxidation to form chlorine and an alkali hydroxide solution; and (f) recycling at least a portion of one or both of the chlorine and the alkali hydroxide solution.

    摘要翻译： 方法包括：（a）在合适的催化剂存在下使光气和单羟基芳基化合物反应，形成碳酸二芳酯和包含碱金属氯化物的溶液; （b）从溶液中分离碳酸二芳酯; （c）将溶液的pH调节至小于或等于8的值以形成pH调节的溶液; （d）用吸附剂处理pH调节的溶液以形成处理溶液; （e）使经处理的溶液的至少一部分进行电化学氧化以形成氯和碱金属氢氧化物溶液; 和（f）回收氯和氢氧化碱溶液中的一种或两种的至少一部分。