The phase diagrams for the ILs + K2CO3 aqueous biphasic systems were measured.
The binodal curves for the IL + K2CO3 aqueous biphasic systems were determined.
The effect of temperature on two phase formation was studied.
The ionic liquids [Bmim][NO3], [Hmim][NO3] and [Omim][NO3] were used.
The NRTL model was used for correlation of the experimental tie line data.