Process for realizing efficient cascade depolymerization of pet by using an extremely low load organic amine catalyst
By using a bifunctional organic amine catalyst in dimethyl carbonate solvent in synergy with a nucleophilic auxiliaries, highly efficient depolymerization of PET was achieved, solving the problems of high catalyst dosage and difficulty in removing ethylene glycol byproducts, reducing costs and improving depolymerization efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- UNIV OF SCI & TECH OF CHINA
- Filing Date
- 2026-06-09
- Publication Date
- 2026-07-07
AI Technical Summary
In existing technologies, high catalyst usage leads to high PET depolymerization costs and difficulties in separation and recovery. Ethylene glycol byproducts are also difficult to remove effectively, affecting depolymerization efficiency.
By employing a bifunctional organic amine catalyst in dimethyl carbonate solvent in synergy with a nucleophilic auxiliary agent, extremely low loading (250 ppm ~ 500 ppm) depolymerization of PET was achieved, resulting in the preparation of dimethyl terephthalate and ethylene carbonate.
Highly efficient depolymerization of PET was achieved with extremely low catalyst loading, significantly reducing catalyst usage costs and effectively capturing and converting ethylene glycol fragments, thereby improving depolymerization efficiency.
Smart Images
Figure CN122344136A_ABST