This study demonstrates the direct hydrogenation of polyethylene terephthalate (PET) dissolved in 1,1,1,3,3,3-hexafluro-2-propanol to environmentally friendly polyester polyethylene-1,4-cyclohexanedicarboxylate (PECHD) using a Vulcan XC-72 supported Rh-Pt bimetallic catalyst synthesized via a polyol method. The hydrogenation of PET was promoted by RhO_x species present on the catalyst support surface which was generated using the polyol synthesis method. As compared to the monometallic Rh catalyst, the Rh-Pt bimetallic catalyst was found to be superior for hydrogenation of PET. This superiority was attributed to the strong aromatic ring adsorption ability of Rh working in synergy with an increased H₂ spillover by Pt. At a H₂ pressure of 6.89 MPa and 50 °C for 60 min, complete hydrogenation of PET to PECHD was achieved over the Rh-Pt bimetallic catalyst possessing theoretical Rh and Pt metal loadings of 2.5 wt% each. PECHD was found to be recovered to a very high extent using the compressed CO₂ anti-solvent technique after hydrogenation of PET.

本研究展示了使用 Vulcan XC- 将溶解在 1,1,1,3,3,3-hexafluro-2-丙醇中的聚对苯二甲酸乙二醇酯 (PET) 直接氢化为环保型聚酯聚乙烯-1,4-环己烷二甲酸酯 (PECHD)通过多元醇法合成的 72 负载型 Rh-Pt 双金属催化剂。使用多元醇合成方法生成的催化剂载体表面上存在的 RhO _{x物质促进了 PET 的氢化。}与单金属 Rh 催化剂相比，Rh-Pt 双金属催化剂在 PET 加氢方面表现出众。这种优势归因于Rh的强芳环吸附能力与Pt增加的H ₂溢出协同作用。在 H ₂在 6.89 MPa 的压力和 50°C 的压力下 60 分钟，在 Rh-Pt 双金属催化剂上实现了 PET 完全氢化成 PECHD，理论上 Rh 和 Pt 金属负载量分别为 2.5 wt%。_{发现在 PET 氢化后使用压缩 CO 2}反溶剂技术可以非常高地回收 PECHD 。