1. Department of Applied Chemistry, College of Chemical and Biological Engineering, Shandong University of Science and Technology, Qingdao, P.R. China
2. Shandong Bosen Chemical Technology Testing CO. LTD, Dongying, P.R. China
3. Department of Chemical Engineering, College of Chemical and Biological Engineering, Shandong University of Science and Technology, Qingdao, P.R. China