The liquid–liquid phase equilibria (LLE) of the following imidazolium ionic liquids (ILs),{1- ethyl-3-ethylimidazolium, or 1-butyl-3-ethylimidazolium, or 1-hexyl-3-ethylimidazolium bis {(trifluoromethyl) sylfonyl} imide [EEIM][Tf2N], or [BEIM][Tf2N], or [HEIM][Tf2N],+ water or+ 1- octanol}, and {1-butyl-3-ethylimidazolium hexafluorophosphate [BEIM][PF6]+ water or+ 1- octanol}, have been measured. The effect of anion type ([Tf2N]-compared to [PF6]-) and ...