Preparation,characterization of H6P2W18O62／SiO2 and catalyzing synthesis of tetrahydrofuran
1.College of Chemical Engineering and Materials Science, Zhejiang University of Technology, Hangzhou, Zhejiang 310014, China; 2. College of Chemical and Environmental Engineering, Jiujiang University, Jiujiang, Jiangxi 332005, China; 3.School of Biochemical and Environmental Engineering, Nanjing Xiaozhuang University, Nanjing, Jiangsu 211171, China
Abstract：Phosphotungstic acids with Dawson structure(H6P2W18O62) supported on SiO2 were prepared by sol-gel method. The Dawson structure of phosphotungstic acids after loading on SiO2 and 30％ H6P2W18O62 loading quantity are confirmed, and H6P2W18O62 can be well dispersed on the SiO2 support. The catalytic performance of H6P2W18O62／SiO2 was investigated by the catalytic synthesis of tetrahydrofuran from 1,4butanediol. The results of orthogonal experiments and simple factor experiments show that H6P2W18O62／SiO2 exhibits good catalytic performance for catalytic synthesis of tetrahydrofuran from 1,4butanediol. Under the optimal conditions with H6P2W18O62 of 66％ relative to the dosage of 1,4butanediol, reaction temperature of 185～190 ℃ and reaction time of 40 min, the isolated yield of tetrahydrofuran can reach 91.70％. The catalyst can be reused for five times with no evident decline of catalytic performance, and the isolated yield of tetrahydro-furan is still above 90.90％.
2013, Vol. 34 
