Extraction of hydrogen chloride by a coupled reaction-solvent extraction process  

作　　者：Yunzhao Li Xingfu Song Guilan Chen Shuying Sun Yanxia Xu Jianguo Yu 

机构地区：[1]National Engineering Research Center for Integrated Utilization of Salt Lake Resource, East China University of Science and Technology, Shanghai 200237, China

出　　处：《Frontiers of Chemical Science and Engineering》2015年第4期479-487,共9页化学科学与工程前沿（英文版）

摘　　要：A coupled reaction-solvent extraction process was used to remove HC1 from a simulated distiller waste. The extraction performances of various extractants and diluents were compared and the apparent basicity ofN235 （a mixture of tertiary amines） in various diluents was determined. The best results were obtained using N235 and isoamyl alcohol as the extractant and diluent, respectively. The yield of HC1 from the coupled extraction was 75% with this extraction system. The mechanisms for the removal of HC1 in both the direct and coupled extractions were investigated. For the coupled extraction, the formation of an RaNHC1 ion-pair complex was involved in the HC1 removal. For the direct extraction, the mechanism involved the formation of hydrogen bonds at high concentrations of HC1.A coupled reaction-solvent extraction process was used to remove HC1 from a simulated distiller waste. The extraction performances of various extractants and diluents were compared and the apparent basicity ofN235 （a mixture of tertiary amines） in various diluents was determined. The best results were obtained using N235 and isoamyl alcohol as the extractant and diluent, respectively. The yield of HC1 from the coupled extraction was 75% with this extraction system. The mechanisms for the removal of HC1 in both the direct and coupled extractions were investigated. For the coupled extraction, the formation of an RaNHC1 ion-pair complex was involved in the HC1 removal. For the direct extraction, the mechanism involved the formation of hydrogen bonds at high concentrations of HC1.

关 键 词：distiller waste coupled reaction and solventextraction N235 extraction mechanism hydrogen chloride 

分 类 号：TQ126.35[化学工程—无机化工] TQ929[轻工技术与工程—发酵工程]