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    • 11. 发明公开
    • PROCESS FOR THE CONTINUOUS PRODUCTION OF POLYESTERS
    • VERFAHREN ZUR KONTINUIERLICHEN HERSTELLUNG VON POLYESTERN
    • EP2310437A1
    • 2011-04-20
    • EP09781236.6
    • 2009-07-29
    • PURAC Biochem BVSulzer Chemtech AG
    • HAAN, Robert EdgarJANSEN, Peter PaulDE VOS, Siebe CornelisVAN BREUGEL, JanKREIS, Peter WilliLANFRANCHI, Sarah
    • C08G63/78
    • C08G63/785C08G63/08
    • Continuous process of forming aliphatic polyesters The process includes continuously providing cyclic ester monomer and polymerization catalyst to a continuous mixing loop reactor (CMLR) having static mixing elements and operated at a temperature between 100 and 240° C. to form a pre-polymerized reaction mixture. The conversion is between 40 and less than 90 wt. %, wherein the cyclic ester monomer comprises lactide having a free acid content lower than 50 milli-equivalents per kg. The pre-polymerized reaction mixture is continuously provided to a plug flow reactor that is a static mixer reactor having static mixing elements and is operated at a temperature between 110-240° C., wherein the reaction mixture is polymerized to a conversion of at least 90%, to form polymer wherein the flow ratio of the CMLR and the plug flow reactor is between 1.5 an d50. The process includes continuously removing polymer from the plug flow reactor devolitizing the polymer.
    • 在100-240℃的温度下环状酯单体开环聚合以形成脂族聚酯的连续方法,其包括a)连续地向连续混合反应器提供环状酯单体和聚合催化剂,反应器在 有效聚合以形成预聚合的反应混合物的条件,b)从连续混合反应器中连续除去预聚合的反应混合物,并将连续提供预聚合的反应混合物连续提供给活塞流反应器,活塞流反应器在聚合条件下操作 其中反应混合物聚合至至少90%的聚合度,以形成聚合物,和c)从活塞流反应器中连续除去聚合物。