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    • 2. 发明公开
    • METHOD FOR PRODUCTION OF POLYCARBONATE AND FILTERING DEVICE
    • VERFAHREN ZUR HERSTELLUNG VON POLYCARBOMAT UND FILTERVORRICHTUNG
    • EP1199325A1
    • 2002-04-24
    • EP00915513.6
    • 2000-04-13
    • TEIJIN LIMITED
    • MURAKAMI, MasahiroSIMONARU, MasasiSAWAKI, ToruSASAKI, Katsushi
    • C08G64/40
    • C08G64/406C08G64/307
    • A process for producing a polycarbonate using at least one filter unit which stores a plurality of disk type filter elements having an outer diameter of 15 inches (38.1 cm) or less, an inner diameter/outer diameter ratio of 1/7 or more and an opening size of 40 µm or less and piled up together, and a filter unit.
      A high-quality polycarbonate and a molded product thereof can be produced by removing foreign matter efficiently using the filter unit and suppressing discoloration, crosslinking and gel formation in the filter unit at the same time.
      The production process and filter unit are especially effective for a polycarbonate produced by an ester exchange method.
    • 一种聚碳酸酯的制造方法,其特征在于,使用至少一个过滤器单元来制造聚碳酸酯,该过滤器单元存储外径为15英寸(38.1cm)以下,内径/外径比为1/7以上的多个圆盘型过滤元件, 开口尺寸为40μm以下,堆积在一起,并具有过滤器单元。 可以通过使用过滤器单元有效地去除异物并同时抑制过滤器单元中的变色,交联和凝胶形成,从而制造高质量的聚碳酸酯及其成型体。 生产工艺和过滤装置对于通过酯交换法生产的聚碳酸酯是特别有效的。