Zubar Viktoriia, Haedler Andreas T, Schütte Markus, Hashmi A Stephen K, Schaub Thomas
Catalysis Research Laboratory (CaRLa), University of Heidelberg, Im Neuenheimer Feld 584, 69120, Heidelberg, Germany.
BASF SE, Carl-Bosch-Straße 38, 67056, Ludwigshafen, Germany.
ChemSusChem. 2022 Jan 10;15(1):e202101606. doi: 10.1002/cssc.202101606. Epub 2021 Aug 25.
Chemical recycling, in particular hydrogenative depolymerization, offers a promising way to utilize plastic waste. This report covers the manganese-catalyzed hydrogenation of polyurethane materials to the corresponding monomeric units. The key to success is a Mn pincer complex as a potent hydrogenation catalyst in combination with elevated temperatures (up to 200 °C) and appropriate solvents to ensure sufficient solubility of the polymers. A wide range of polyurethane samples of varying polyol and isocyanate compositions, some of which feature significant amounts of urea functionalities, are depolymerized, releasing polyetherols and diaminotoluene (TDA) in yields of up to 89 % and 76 %, respectively.
化学循环利用，尤其是加氢解聚，为利用塑料废料提供了一种很有前景的方法。本报告涵盖了锰催化的聚氨酯材料加氢生成相应单体单元的过程。成功的关键在于使用一种锰钳形配合物作为高效加氢催化剂，并结合高温（高达200°C）和合适的溶剂，以确保聚合物有足够的溶解度。对各种具有不同多元醇和异氰酸酯组成的聚氨酯样品进行解聚，其中一些含有大量的脲官能团，分别以高达89%和76%的产率释放出聚醚醇和二氨基甲苯（TDA）。
