Chemical Research in Chinese Universities ›› 2026, Vol. 42 ›› Issue (5): 1554-1559.doi: 10.1007/s40242-026-6072-6

• Research Articles • Previous Articles     Next Articles

Co-recycling of Polyethylene Terephthalate and Polylactic Acid by WO3-loaded S1 Zeolite

LI Yuxiong1,2,3, WU Xueting4, XU Jing1,2,3, WANG Xiao1,2,3, SONG Shuyan1,2,3, ZHANG Hongjie1,2,3,5   

  1. 1. State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China;
    2. School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei 230026, P. R. China;
    3. China-Belarus "Belt and Road" Joint Laboratory for Advanced Materials and Manufacturing, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China;
    4. School of Chemistry & Environmental Engineering, Changchun University of Science and Technology, Changchun, 130022, P. R. China;
    5. Department of Chemistry, Tsinghua University, Beijing 100084, P. R. China
  • Received:2026-03-23 Accepted:2026-05-06 Online:2026-10-01 Published:2026-09-24
  • Supported by:
    This work was supported by the Program of Science and Technology Development Plan of Jilin Province of China (No. SLK202402015), the National Natural Science Foundation of China (Nos. 22020102003, 22025506, and 22271274), and the Program of Science and Technology Development Plan of Jilin Province of China (No. 20240402056GH). WANG Xiao acknowledges the funding from the National Natural Science Foundation of China Outstanding Youth Science Foundation of China (Overseas).

Abstract: Chemical recycling of single-component plastic wastes is regarded as an important way to save waste carbon resources. However, the real plastic wastes are multi-component composition, which combine with various plastics, and the chemical recycling of mixed polyesters often faces significant challenges because of complex functional groups and harsh acidic environment. In this work, we combined WO3 with zeolite and synthesized 5W/S1 to address this challenge. The 5W/S1 shows excellent catalytic ability, which can convert polyethylene terephthalate (PET) and polylactic acid (PLA) to terephthalic acid (TPA), ethylene glycol (EG), and lactic acid (LA) with high yields and keep activity after use. From the results, there is a synergistic effect that occurs during the reaction, which is induced by polylactic acid and 5W/S1; they are synergistic in activating the ester groups to promote the conversion of PET. This work can provide a novel insight into the development of stable catalysts for recycling mixed plastics.

Key words: Co-recycling, Mixed plastic, Hydrolysis, Synergistic activating