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    • 4. 发明授权
    • Process for the production of polycarbonate
    • 聚碳酸酯生产工艺
    • US07129315B2
    • 2006-10-31
    • US11105680
    • 2005-04-14
    • Jörg KirchhoffThomas KönigKlemens KohlgrüberSteffen KühlingDirk Van Meirvenne
    • Jörg KirchhoffThomas KönigKlemens KohlgrüberSteffen KühlingDirk Van Meirvenne
    • C08G64/00
    • C08G64/403C08G64/205
    • A process for the isolation of polycarbonate produced by the interfacial polymerization process is disclosed. Accordingly, the process entails (a) evaporating the organic solvent from the solution that contains solvent and polycarbonate to obtain a material system that contains 90 to 99.95% polycarbonate, the percent being relative to the weight of the system, and (b) passing the material system through inlet openings of a separating vessel to obtain a plurality of streams of polycarbonate, on entry into the inlet openings said material system being supersaturated with volatile constituents to an extent of at least 1 bar and having a temperature of 250° to 340° C. and a flow rate of 0.1 to 20 kg/hour, and (c) degassing the streams in the separating vessel wherein the pressure is 0.1 to 20 mbar to effect degassing of the polycarbonate.
    • 公开了通过界面聚合方法分离聚碳酸酯的方法。 因此,该方法需要(a)从含有溶剂和聚碳酸酯的溶液中蒸发有机溶剂以获得含有90至99.95%聚碳酸酯的材料体系,其百分数相对于体系重量,和(b)使 材料系统通过分离容器的入口开口,以获得多个聚碳酸酯流,在进入入口时,所述材料体系用挥发性成分过饱和至少1巴,温度为250°至340° 并且流速为0.1至20kg /小时,和(c)使分离容器中的气流脱气,其中压力为0.1至20毫巴,以实现聚碳酸酯脱气。
    • 7. 发明授权
    • Process for separating volatile components from polymers
    • 挥发性组分与聚合物分离的方法
    • US07144981B2
    • 2006-12-05
    • US10684600
    • 2003-10-14
    • Thomas KönigKlemens KohlgrüberUlrich LiesenfelderMichael BierdelHelmut MeyerRichard WeiderJörg Krüger
    • Thomas KönigKlemens KohlgrüberUlrich LiesenfelderMichael BierdelHelmut MeyerRichard WeiderJörg Krüger
    • C08F6/00
    • C08F6/003
    • A process for concentrating polymers by evaporation is disclosed. The process entails (i) obtaining a mixture containing a polymer and volatile component, the volatile components being present in the mixture at an amount less than 20 wt. % relative to the weight of the mixture, and (ii) introducing the mixture in a downward direction under pressure through a plurality of nozzles arranged vertically and next to one another into a degassing container to form an extrudate. The volatile component contains at least one of residual monomers, oligomers and solvents, and the throughput of the mixture per nozzle is 0.3 to 2 kg/h. The vapor pressure of the volatile component of the extrudate is more than 2.5 bar, and the absolute pressure in the degassing container is 50 to 5000 Pa. The polymer prepared by the process is characterized in that it contains volatile components in an amount of less than 300 ppm.
    • 公开了通过蒸发浓缩聚合物的方法。 该方法需要(i)获得含有聚合物和挥发性组分的混合物,所述挥发性组分以小于20重量%的量存在于混合物中。 相对于混合物重量的%,和(ii)通过垂直且彼此相邻布置的多个喷嘴在压力下向下引入混合物到脱气容器中以形成挤出物。 挥发性组分含有残留单体,低聚物和溶剂中的至少一种,并且每个喷嘴的混合物的生产量为0.3至2kg / h。 挤出物的挥发性成分的蒸气压大于2.5巴,脱气容器中的绝对压力为50〜5000Pa。本方法制备的聚合物的特征在于,其含有挥发性成分的量小于 300 ppm。