In this report, the density, viscosity, and heat capacity of the tetraalkylphosphonium ionic liquids, containing newly synthesized trihexyltetradecylphosphonium p-dodecylbenzenesulfonate and bis(2-ethylhexyl)sulfobutanedioate, were measured at atmospheric pressure. Then, the n-butane absorption in the dialkylimidazolium and tetraalkylphosphonium ionic liquids were investigated at the n-butane pressure of 0.101 MPa and the temperatures of (298.15–353.15) K. In a series of bis(trifluoromethanesulfonyl)amide ionic liquids, the trihexyltetradecylphosphonium salt absorbed the largest amount of n-butane, followed by the triethyloctylphosphonium, 1-methyl-3-octylimidazolium, and 1-butyl-3-methylimidazolium salts. On the other hand, in the trihexyltetradecylphosphonium ionic liquids, the bis(2-ethylhexyl)sulfobutanedioate and p-dodecylbenzenesulfonate salts had the higher solubilities of n-butane than the bis(trifluoromethanesulfonyl)amide salt. In addition, the solubilities of water vapor in the trihexyltetradecylphosphonium salt were measured at 298.2 K and atmospheric pressure. Trihexyltetradecylphosphonium bis(trifluoromethanesulfonyl)amide was the most free from the moisture. We further performed the continuous gas absorption experiments of n-heptane and toluene using the present tetraalkylphosphonium ionic liquids. They removed successfully the vapors of hydrocarbons despite the very dilute concentrations of hydrocarbons, less than 1500 ppm. The initial absorption rates were calculated to discuss the absorption kinetics in the tetraalkylphosphonium ionic liquids.

在该报告中，在大气压力下测量了含有新合成的对-十二烷基苯磺酸三己基十四烷基phosph和双（2-乙基己基）磺基丁二酸酯的四烷基phosph离子液体的密度，粘度和热容量。然后，在正丁烷压力为0.101 MPa和温度为（298.15-353.15）K的条件下，研究了二烷基咪唑鎓和四烷基phosph离子液体中的正丁烷吸收情况。盐吸收最大量的n-丁烷，然后是三乙基辛基phosph，1-甲基-3-辛基咪唑鎓盐和1-丁基-3-甲基咪唑鎓盐。另一方面，在三己基十四烷基phosph离子液体中，双（2-乙基己基）磺基丁二酸盐和对十二烷基苯磺酸盐具有比二（三氟甲磺酰基）酰胺盐更高的正丁烷溶解度。另外，在298.2K和大气压下测量三己基十四烷基yl盐中水蒸气的溶解度。双（三氟甲磺酰基）酰胺的三己基十四烷基phosph最没有水分。我们进一步进行了n的连续气体吸收实验-庚烷和甲苯，使用本发明的四烷基phosph离子液体。尽管碳氢化合物的浓度非常稀疏（小于1500 ppm），但他们还是成功地去除了碳氢化合物的蒸气。计算初始吸收速率以讨论四烷基phosph离子液体中的吸收动力学。