Gas Solubilities in 1-n-Butyl-3-methylimidazolium Hexafluorophosphate

摘要

The solubility of carbon dioxide, ethylene, ethane, and methane in 1-n-butyl-3-methylimidazolium hexafluoro-phosphate ([bmim][PF_6]) at 25℃ are reported. This information is important in evaluating ionic liquids as media for reactions involving gases (i.e., C_2H_4), considering the extraction of solutes from ionic liquids by gas stripping or supercritical fluid extraction, and considering the use of ionic liquids for gas separation and purification. Carbon dioxide is quite soluble in [bmim][PF_6], followed by ethylene, ethane and methane.