1. The State Key Lab of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum East China, Qingdao, Shandong 266580, China
2. Yankuang Guohong Chemicals CO., LTD, Zoucheng, Shandong 273500, China
3. Yankuang Group CO., LTD, Zoucheng, Shandong 273500, China