Investigation on the Synthesis of α-Terpinene and Maleic Anhydride Adduct Catalyzed by Heteropolyacid
α-pinene was isomerized in the presence of phosphomolybdic acid. One of the products, α-terpinene, can react with maleic anhydride to form α-terpinene and maleic anhydride adduct (TMA). The optimum conditions for the synthesis of TMA have been investigated. The yield of 83% can be attained with the heterogeneous catalyst phosphomolybdic acid on active carbon (PMA/C), and can maintain ~67% after the catalyst was used for 5 times.
Qunjie Xu, Honghua Ge and Junxi Zhang
Y. M. Nie et al., "Investigation on the Synthesis of α-Terpinene and Maleic Anhydride Adduct Catalyzed by Heteropolyacid", Advanced Materials Research, Vols. 361-363, pp. 1063-1065, 2012