Upcycling of polyphenylene oxide into 2,6-dimethyl aniline via depolymerization and amination over a Pt/CeO_(2) catalyst  

作　　者：Shengchao Jia Wenke Zhao Xiaohui Liu Yong Guo Yanqin Wang 

机构地区：[1]State Key Laboratory of Green Chemical Engineering and Industrial Catalysis,Research Institute of Industrial Catalysis,School of Chemistry and Molecular Engineering,East China University of Science and Technology,Shanghai 200237,China [2]Shanghai Key Laboratory of Functional Materials Chemistry,School of Chemistry and Molecular Engineering,East China University of Science and Technology,Shanghai 200237,China

出　　处：《Science China Chemistry》2025年第2期520-525,共6页中国科学(化学英文版)

基　　金：supported by the National Natural Science Foundation of China(22172048,22072042).

摘　　要：Upcycling of plastic waste into N-containing compound is a novel and attractive strategy for its disposal and will opens up a promising direction for the production of value-added amines.Herein,an efficient strategy for the depolymerization-amination of polyphenylene oxide(PPO)into 2,6-dimethyl aniline is developed over a simple Pt/CeO_(2) catalyst.The C–O linkages of PPO can be selectively broken,producing 2,6-dimethyl phenol and then hydrogenated and aminated to 2,6-dimethyl cyclohexylamine over the Pt/CeO_(2) catalyst.Finally,2,6-dimethyl aniline was produced with high selectivity through the dehydrogenation of 2,6-dimethyl cyclohexylamine in the same catalyst.Toluene can be used as the hydrogen-acceptor in the dehydrogenation step and enhance the selectivity of target product.Single N-containing compound,2,6-dimethyl aniline,is obtained and separated after HCl treatment.Meanwhile,the Pt/CeO_(2) catalyst exhibit remarkable stability and can sustainably catalyze the synthesis of 2,6-dimethyl aniline in several cycles.

关 键 词：PPO depolymerization-amination 2 6-dimethyl aniline Pt/CeO_(2) 

分 类 号：TQ426[化学工程] TQ246.3