High-efficiency separation and extraction of naphthenic acid from high acid oils using imidazolium carbonate ionic liquids  

作　　者：Fenghua Geng Rui Zhang Luo Wu Zheng Tang Han Liu Haiyan Liu Zhichang Liu Chunming Xu Xianghai Meng 

机构地区：[1]State Key Laboratory of Heavy Oil Processing,China University of Petroleum,Beijing 102249,China

出　　处：《Chinese Journal of Chemical Engineering》2022年第1期252-259,共8页中国化学工程学报（英文版）

基　　金：support of the National Natural Science Foundation of China(22078359,21276275).

摘　　要：N-alkyl imidazolium carbonate ionic liquids were employed to separate and recover naphthenic acid from model oils.The effects of the cationic and anionic structures of ionic liquids and operating conditions on the deacidification performance were investigated.The deacidification performance of traditional organic solvents was also investigated for comparison.The results indicated that the naphthenic acid could be completely removed from the model oil with a small mass ratio of ionic liquid to oil.The extracted naphthenic acid was regenerated with a recovery of up to 92%.In addition,imidazolium carbonate ionic liquids could be successfully regenerated and recycled.The mechanism of interaction between imidazole ionic liquids and the naphthenic acid molecules were explained by Gauss calculation.

关 键 词：EXTRACTION Ionic liquid Naphthenic acid Recovery Computational chemistry 

分 类 号：TQ028[化学工程] TQ235[理学—物理化学] O645.1[理学—化学]