Continuous manufacture of poly(trimethylene terephthalate)
    3.
    发明申请
    Continuous manufacture of poly(trimethylene terephthalate) 有权
    连续制造聚对苯二甲酸丙二醇酯

    公开(公告)号:US20070191581A1

    公开(公告)日:2007-08-16

    申请号:US11638978

    申请日:2006-12-14

    IPC分类号: C08G63/02

    CPC分类号: C08G63/78 Y10T29/49005

    摘要: This invention relates to a continuous process for production of poly(trimethylene terephthalate), wherein gaseous 1,3-propanediol by-product resulting from the process is condensed in a condenser, the total amount of any trimethylene terephthalate cyclic dimer and poly(trimethylene terephthalate) in the condensed by-product 1,3-propanediol is adjusted, and a portion of the condensed by-product is recycled to the condenser while another portion is recycled back into the process.

    摘要翻译: 本发明涉及生产聚(对苯二甲酸丙二醇酯)的连续方法,其中由该方法得到的气态1,3-丙二醇副产物在冷凝器中冷凝,任何三亚甲基对苯二甲酸酯环状二聚体和聚(对苯二甲酸丙二醇酯 )在缩合的副产物1,3-丙二醇中进行调节,一部分冷凝的副产物被再循环到冷凝器中,而另一部分被循环回到该方法中。