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    • 1. 发明专利
    • Phase interface method related to production of polycarbonate
    • 与生产聚碳酸酯相关的相接口方法
    • JP2009209372A
    • 2009-09-17
    • JP2009051589
    • 2009-03-05
    • Bayer Materialscience Agバイエル・マテリアルサイエンス・アクチェンゲゼルシャフトBayer MaterialScience AG
    • EBERT WOLFGANGKORDS CHRISTIANBACHMANN ROLFOBENDORF LARSEYNDE JOHAN VANDENRUYTINX BERTSEEBA JOHANN
    • C08G64/24
    • C08G64/24
    • PROBLEM TO BE SOLVED: To provide a method of reducing an excessive phosgene as much as possible, and capable of preventing a defect of a prior art from being generated, as to an efficient continuous production method of a polycarbonate using a phase interface method. SOLUTION: This production method of reacting a dihydroxy diaryl alkane with phosgene in the presence of a catalyst by the phase interface method includes a process for dispersing continuously an organic phase containing a solvent suitable for the phosgene and the polycarbonate, and an aqueous phase containing the dihydroxy diaryl alkane, water and an alkaline solution existing at an amount of 1.5-2.5 mol. per one mole of the dihydroxy diaryl alkane, in a disperser 1, a process for reacting a mixture therein within 0.5 or less of residence time, in the first reactor, a process for reacting further the mixture while adding an additional alkaline solution, in the second reactor, and a process for carrying out condensation by adding an additional alkaline solution, and a chain terminator when necessary, in the presence of the catalyst, in the third reactor. COPYRIGHT: (C)2009,JPO&INPIT
    • 要解决的问题:为了提供尽可能减少过量的光气并且能够防止现有技术的缺陷产生的方法,关于使用相界面的聚碳酸酯的有效的连续制备方法 方法。 解决方案:通过相界面法在催化剂存在下使二羟基二芳基烷烃与光气反应的该制备方法包括连续分散含有适用于光气和聚碳酸酯的溶剂的有机相和 相含有二羟基二芳基烷烃,水和碱性溶液,其量为1.5-2.5mol。 在分散器1中,在其中在其中的混合物的反应时间在0.5或更小的停留时间内的方法,在第一反应器中,使进一步混合物同时加入另外的碱性溶液的方法在 第二反应器,以及通过添加额外的碱性溶液进行缩合的方法,必要时在催化剂的存在下在第三反应器中进行链终止剂。 版权所有(C)2009,JPO&INPIT
    • 10. 发明专利
    • AT520728T
    • 2011-09-15
    • AT09002488
    • 2009-02-21
    • BAYER MATERIALSCIENCE AG
    • EBERT WOLFGANGKORDS CHRISTIANBACHMANN ROLFOBENDORF LARSEYNDE JOHAN VANDENRUYTINX BERTSEEBA JOHANN
    • C08G64/24
    • Continuously producing polycarbonates by phase boundary process, comprises: (a) producing a mixture of organic- and aqueous-phases by continuously dispersing the organic phase in the aqueous phase or the aqueous phase in the organic phase; (b) reacting the mixture in a reactor; (c) further reacting the mixture by adding further alkali metal hydroxide solution and optionally chain terminator(s) in a further reactor; and (d) further condensing by adding further alkali metal hydroxide solution, optionally chain terminator(s) and in the presence of a catalyst in a further reactor. Continuously producing polycarbonates with an average weight average molecular weight of 15000-200000 g/mol, by phase boundary process from at least one dihydroxydiarylalkane, phosgene and at least one catalyst optionally in the presence of at least one chain terminator and/or chain-branching agent, comprises: (a) producing a mixture of organic- and aqueous-phases by continuously dispersing the organic phase in the aqueous phase or the aqueous phase in the organic phase by a disperser, where the organic phase contains at least one suitable solvent for the polycarbonate and complete or partial phosgene and the aqueous phase contains the dihydroxyalkane(s), water and an alkali metal hydroxide solution, and 1.5-2.5 moles of the alkali metal hydroxide solution are added per mole of dihydroxydiarylalkane; (b) reacting the mixture in a reactor with a dwell time of less than 0.5 second; (c) reacting the reaction mixture by adding further alkali metal hydroxide solution and optionally chain terminator(s) in an another reactor; and (d) further condensing by adding further alkali metal hydroxide solution, optionally chain terminator(s) and in the presence of at least one catalyst in at least a further reactor. An independent claim is included for use of a disperser containing a pre-disperser, a homogenizing nozzle and at least three pumps for producing the mixture of organic and aqueous phases during the production of the polycarbonate.