i have performed a reaction to prepare an ionic liquid, the reaction results in an aqueous solution containing the ionic liquid (hydrophilic one) and sodium bromide, so i want to separate sodium bromide from the aqueous solution completely, then i get an aqueous solution containing only the targeted ionic liquid which i can get in a pure form by evaporation of residual water.
Is your particular Ionic Liquid miscible in organic solvents? You could remove the water by evaporation or freeze drying, and selectively redissolve the ionic liquid in an organic solvent (leaving the NaBr as a solid), filter and collect the filtrate then isolate the ionic liquid by evaporation of the organic solvent.
You can separate the ionic liquid simply by extraction with organic solvent like dichloromethane. If your IL is insoluble in organic solvents then you have to evaporate the water to get precipitate of NaBr and IL can be obtained by filtration.
First evaporate the water in vacuo, then use a suitable solvent for the separation of IL form NaBr (DCM, chloroform, toluene, etc., but not ALCOHOLS, DMF, which dissolve NaBr).
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