文献类型：期刊文献

英文题名：New reactor for polyester polyols continuous synthetic process

作者：Chen, Like[1]; Xi, Zhenhao[1]; Qin, Zhen[1]; Zhao, Ling[1]; Yuan, Weikang[1]

机构：[1] State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China

年份：2013

卷号：333

期号：1

起止页码：151

外文期刊名：Macromolecular Symposia

收录：EI(收录号：20135017074326)

语种：英文

外文关键词：Oligomers - Atmospheric pressure - Byproducts - Condensation reactions - Distillation - Polyols - Esterification - Esters - Ethylene - Polycondensation

摘要：Based on the kinetic and thermodynamic equations, a comprehensive mathematical model for the continuous synthetic process of polyester polyols was developed, which was carried out in two innovational bubbling reactive distillation towers (BRDTs). In this new type of reactor, condensation reactions among oligomers of polyester polyols were accomplished efficiently and rapidly. Two bench BRDTs with the height of 2 m were applied for the continuous process of poly(ethylene adipate) (PEA). In the first continuous esterification operation at atmospheric pressure, linear oligomers were discharged from the bottom of the column, while water and ethylene glycol (EG) passed a few column trays and a packing section and reached the top of the column. Then water was discharged as byproducts and EG was sent back to the first tray for further reaction. In the second continuous polycondensation operated in the second BRDT under partial vacuum, PEA was discharged from the bottom of the column, while water and ethylene glycol passed a few column trays, they were discharged as byproducts. The influence of major operating conditions on reactor performance was also simulated. Simulation results provided a strategy for developing and optimizing this process. ? 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.