Acta Phys. -Chim. Sin. ›› 2006, Vol. 22 ›› Issue (10): 1272-1276.doi: 10.1016/S1872-1508(06)60062-4

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Carbonylation of Aryl Halide Catalyzed by Active-carbon Supported Ionic Liquid-phase Palladium Catalyst

LIN Qi;FU Hai-Yan;YUAN Mao-Lin;CHEN Hua;LI Xian-Jun   

  1. Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, P. R. China; Department of Chemistry and Chemical Engineering, Minjiang University, Fuzhou 350108, P. R. China
  • Received:2006-05-28 Revised:2006-06-28 Published:2006-10-11
  • Contact: CHEN Hua

Abstract: Highly dispersed supported ionic liquid-phase palladium catalyst was prepared and its catalytic performances for carbonylation of aryl halide were investigated. Active-carbon supported ionic liquid-phase palladium catalyst was characterized by XRD, high-resolution TEM (HRTEM), and XPS. The results showed that the active-carbon supported ionic liquid-phase palladium catalyst was reduced to zero valence and that the average particle diameter of the Pd crystallites was less than 5 nm. A thin ionic liquid film was observed on the surface of the catalyst. The results indicated that the supported ionic liquid-phase palladium catalyst exhibited higher activity in the carbonylation of aryl halides compared with the correspording organic-ionic liquid biphasic system. Under the optimum reaction conditions: 140 ℃, pCO=4.0 MPa, n(PhI):n(Pd)=10528:1, the turnover frequency(TOF) of 4926 h−1 was achieved for ethyl benzoate, with the conversion of 99.3%, and the selectivity for forming ethyl benzoate was more than 99%.

Key words: Water-soluble palladium-phosphine complex, Aryl halide, Carbonylation, Ionic liquid, Supported ionic liquid-phase palladium catalyst