Effects of Ionic Liquids and Supports on the Permeation of Organic Nitrogen Compounds through Supported Ionic Liquid Membranes

摘要

Permeation of organic nitrogen compounds and heptane through supported liquid membranes based on ionic liquids was carried out. First, the effects of the supports on the permeation rates and selectivity were examined and as a result, a polyvinylidene fluoride membrane was selected. Anions and cations of ionic liquids had different effects on the permeation. More hydrophobic cations had larger permeation coefficients, while the effect of anions is the reverse of that of the cations. The membrane impregnated by Zn-containing 1-ethyl-3-methyl imidazolium ethylsulfate ([C_2mim] [EtSO_4]) gave the highest selectivity and relatively high permeation coefficients of nitrogen compounds.