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    • 19. 发明申请
    • Method and device for the production of polyesters and copolyesters
    • 用于生产聚酯和共聚酯的方法和装置
    • US20090192285A1
    • 2009-07-30
    • US10585470
    • 2004-12-14
    • Fritz WilhelmStefan Deiss
    • Fritz WilhelmStefan Deiss
    • C08G63/78B01J19/00
    • B01J19/0013B01D5/0027B01J2219/0011B01J2219/00123B01J2219/0013C08G63/181C08G63/785
    • Disclosed is a method for producing polyesters by means of esterification or re-esterification, precondensation of the esterified/re-esterified product, and polycondensation of the precondensed product at a pressure of 0.2 to 500 mbar and a temperature of 230 to 330° C. According to said method, the vapors formed during precondensation and polycondensation are condensed and the obtained cooled diol is redirected into the condensation stage. In order to improve the degree of separation, the vapors are directed into a bottomless direct contact condenser, the base of which is immersed into the top funnel-shaped section of a barometrically dipped downpipe so as to form an annular space, cooled diol is sprayed into the vapors in the top section of the direct contact condenser, the remaining vapors are recovered via the annular space, and the formed polymer aggregates are removed.
    • 公开了通过酯化或再酯化制备聚酯的方法,酯化/再酯化产物的预缩合,以及在0.2至500毫巴的压力和230至330℃的温度下预缩合产物的缩聚。 根据所述方法,在预缩合和缩聚期间形成的蒸气被冷凝,并将获得的冷却的二醇重新导向冷凝阶段。 为了提高分离度,将蒸气引导到无底直接接触冷凝器中,将其底部浸入气压下降管的顶部漏斗形部分中以形成环形空间,冷却的二醇被喷射 进入直接接触冷凝器顶部的蒸气中,剩余的蒸气经由环形空间回收,并且形成的聚合物聚集体被去除。