Polyether polyols as a crucial chemical for the synthesis of polyurethanes have attracted much attention, especially for propylene oxide-based polyether polyols due to their ready availability and good structural diversity. In the present work, microreactors configured with a SIMM-V2 micromixer and stainless steel capillary were developed for the continuous and efficient synthesis of propylene oxide-based polyether polyols. For the conversion of propylene oxide higher than 95%, the reaction time was less than 60 s that was significantly shorter than that in a batch reactor. Also, the reaction temperature can be controlled precisely, thereby obtaining high purity polyether polyol products. To identify the maximum performance of the microreactors, while keeping the conversion of PO higher than 95%, the novel process windows of the reactors were determined by investigating the relations of reaction temperature and pressure, reaction temperature and residence time, and feed flow rate and residence time. The results showed that high quality polyether polyols could be easily prepared in the microreactors under flexible operating conditions. In addition, polyether polyols with higher molecular weights could also be prepared by using a two SIMM-V2 configured microreactor. This work showed that the microreactors are promising candidates for the synthesis of polyether polyols in the industry.

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在简单的微反应器中高效合成聚醚多元醇

聚醚多元醇作为聚氨酯合成中的关键化学物质已引起了广泛的关注，特别是对于基于环氧丙烷的聚醚多元醇，由于它们易于获得且结构多样性良好。在本工作中，开发了配置有SIMM-V2微型混合器和不锈钢毛细管的微型反应器，用于连续有效地合成基于环氧丙烷的聚醚多元醇。对于高于95％的环氧丙烷转化率，反应时间小于60s，这明显小于间歇反应器中的时间。而且，可以精确地控制反应温度，从而获得高纯度的聚醚多元醇产物。为了确定微反应器的最佳性能，同时将PO的转化率保持在95％以上，通过研究反应温度和压力，反应温度和停留时间，进料流速和停留时间之间的关系，确定了反应器的新型工艺窗口。结果表明，在灵活的操作条件下，可以在微反应器中轻松制备高质量的聚醚多元醇。另外，还可以通过使用两个SIMM-V2结构的微反应器来制备具有较高分子量的聚醚多元醇。这项工作表明，微反应器是工业上合成聚醚多元醇的有希望的候选者。结果表明，在灵活的操作条件下，可以在微反应器中轻松制备高质量的聚醚多元醇。另外，还可以通过使用两个SIMM-V2结构的微反应器来制备具有较高分子量的聚醚多元醇。这项工作表明，微反应器是工业上合成聚醚多元醇的有希望的候选者。结果表明，在灵活的操作条件下，可以在微反应器中轻松制备高质量的聚醚多元醇。另外，也可以通过使用两个SIMM-V2结构的微反应器来制备具有较高分子量的聚醚多元醇。这项工作表明，微反应器是工业上合成聚醚多元醇的有希望的候选者。