公开(公告)号：US20050165178A1

公开(公告)日：2005-07-28

申请号：US11093092

申请日：2005-03-29

申请人： Carl Giardino ,  David Griffith ,  Chungfan Ho ,  James Howell ,  Michelle Watkins

发明人： Carl Giardino ,  David Griffith ,  Chungfan Ho ,  James Howell ,  Michelle Watkins

IPC分类号： C08F2/00 ,  C08G63/183 ,  C08G63/78 ,  C08G85/00

CPC分类号： C08G63/183 ,  C08G63/78 ,  Y10T428/2913 ,  Y10T428/31786

摘要： A continuous process for the production of poly(trimethylene terephthalate) is disclosed. According to the process, a liquid feed mixture comprising bis-3-hydroxypropyl terephthalate and/or low molecular weight polyesters of 1,3-propanediol and terephthalic acid, the liquid feed mixture having a mole ratio of propylene groups to terephthalate groups of 1.1 to 2.2 is fed to a flasher. A first stream of gaseous by-products is continuously vaporized and removed from the flasher, and a liquid flasher reaction product having a mole ratio of propylene groups to terephthalate groups of less than about 1.5 is continuously withdrawn from the flasher. The liquid flasher reaction product is continuously fed to a prepolymerizer where it is continuously polymerized to form a poly(trimethylene terephthalate) prepolymer and a second stream of gaseous by-products. Poly(trimethylene terephthalate) prepolymer having a relative viscosity of at least about 5 is continuously withdrawn from the prepolymerizer and continuously fed to a final polymerizer, where it is continuously polymerized to form a higher molecular weight poly(trimethylene terephthalate) and a third stream of gaseous by-products. Higher molecular weight poly(trimethylene terephthalate) having a relative viscosity of at least about 17 is continuously withdrawn from the final polymerizer.

摘要翻译： 公开了生产聚（对苯二甲酸丙二醇酯）的连续方法。 根据该方法，将包含1,3-丙二醇和对苯二甲酸的低分子量聚酯的双-3-羟丙基对苯二甲酸酯和/或低分子量聚酯的液体进料混合物，该丙烯与对苯二甲酸酯基的摩尔比为1.1〜 2.2被送入闪光器。 气态副产物的第一流被持续蒸发并从闪蒸器中除去，并且具有小于约1.5的丙烯与对苯二甲酸酯基的摩尔比的液体闪蒸反应产物从闪蒸器中连续排出。 将液体闪蒸反应产物连续进料到预聚合器中，在其中连续聚合以形成聚（对苯二甲酸丙二醇酯）预聚物和第二气态副产物流。 相对粘度至少为约5的聚（对苯二甲酸丙二醇酯）预聚物从预聚合器中连续排出，并连续进料至最终聚合反应器，在其中连续聚合形成较高分子量的聚对苯二甲酸丙二醇酯 气态副产品。 相对粘度至少约为17的较高分子量聚（对苯二甲酸丙二醇酯）从最终聚合反应器中连续排出。