Ionic Liquids: Novel Solvents for Petroleum Asphaltenes  

作　　者：刘艳升 胡玉峰 王海波 徐春明 纪德军 孙研 郭天民 

机构地区：[1]State Key Laboratory of Heavy Oil Processing [2]High Pressure Fluid Phase Behavior & Property Research Lab-oratory, University of Petroleum

出　　处：《Chinese Journal of Chemical Engineering》2005年第4期564-567,共4页中国化学工程学报（英文版）

基　　金：Supported by the National Natural Science Foundation of China (No. 20276037) and CNPC Innovation Foundation(No.03E7016)

摘　　要：The dissolution of petroleum asphaltenes with ionic liquids is studied for the first time. The results show that the ionic liquids could be used as novel solvents for asphaltenes. The important parameters governing the ability of ionic liquids for dissolution of asphaltenes are discussed. It is found that, the ionic liquids based on the cations containing a conjugated aromatic core or the anions which are strong hydrogen bond acceptors are most effective, whereas the ionic liquids containing ＇non coordinating＇ anions such as [BF4]^- and [PF6]^- are nonsolvents for asphaltenes. Increase in the effective anion charge density enhances the ability of ionic liquids to break the extensive asphaltene associations and thus enhances the solubility of asphaltenes in the ionic liquid. The dissolution ability of ionic liquid decreases apparently with increasing the substituted alkyl chain length of its cationic head ring. Temperature is found to play an important role on dissolution of asphaltenes, and the dissolution can be significantly imoroved bv microwave heatinz.The dissolution of petroleum asphaltenes with ionic liquids is studied for the first time. The results show that the ionic liquids could be used as novel solvents for asphaltenes. The important parameters governing the ability of ionic liquids for dissolution of asphaltenes are discussed. It is found that, the ionic liquids based on the cations containing a conjugated aromatic core or the anions which are strong hydrogen bond acceptors are most effective, whereas the ionic liquids containing ’non coordinating’ anions such as [BF4]- and [PF6]- are nonsolvents for asphaltenes. Increase in the effective anion charge density enhances the ability of ionic liquids to break the extensive asphaltene associations and thus enhances the solubility of asphaltenes in the ionic liquid. The dissolution ability of ionic liquid decreases apparently with increasing the substituted alkyl chain length of its cationic head ring. Temperature is found to play an important role on dissolution of asphaltenes, and the dissolution can be significantly improved by microwave heating.

关 键 词：ASPHALTENES ionic liquids solvents 

分 类 号：TE626.8[石油与天然气工程—油气加工工程]