TY - JOUR
T1 - Liquid-liquid phase equilibria in nicotine (aqueous) solutions
AU - Grozdanic, N.D.
AU - Najdanovic-Visak, V.
AU - Kijevcanin, M.L.J.
AU - Serbanovic, S.P.
AU - Nunes da Ponte, M.
AU - Visak, Z.P.
PY - 2011/11/25
Y1 - 2011/11/25
N2 - Liquid–liquid equilibria were measured for solutions containing: (1) nicotine, and one of the solvents PEG 200 or ethyl-lactate, and the ionic liquid 1-ethyl-3-methylimidazolium ethyl sulphate (ECOENG 212®); (2) a (nicotine + water) mixture of close to critical composition and one of the co-solvents PEG 200, or glycerol, or ethyl-lactate; and (3) a (nicotine + water) mixture and one of the salts ECOENG 212®, or sodium chloride, or sodium phosphate. The objective of these measurements was to assess the possibility of using environmentally friendly solvents for extraction/separation of nicotine from its (aqueous) solutions. PEG 200, glycerol and ethyl-lactate proved to be good co-solvents of nicotine in water. On the other hand, the inorganic salts Na3PO4 and NaCl showed remarkable salting-out effects in nicotine aqueous solutions, achieved using very small quantities of these salt. The effects of the ionic liquid (molten salt) ECOENG 212®, were, however, much more complex. Depending on its concentration in the solvent, it exhibited either a co-solvent (salting-in) effect or an anti-solvent one. This behaviour is very interesting both from the fundamental and the applications point of view.
AB - Liquid–liquid equilibria were measured for solutions containing: (1) nicotine, and one of the solvents PEG 200 or ethyl-lactate, and the ionic liquid 1-ethyl-3-methylimidazolium ethyl sulphate (ECOENG 212®); (2) a (nicotine + water) mixture of close to critical composition and one of the co-solvents PEG 200, or glycerol, or ethyl-lactate; and (3) a (nicotine + water) mixture and one of the salts ECOENG 212®, or sodium chloride, or sodium phosphate. The objective of these measurements was to assess the possibility of using environmentally friendly solvents for extraction/separation of nicotine from its (aqueous) solutions. PEG 200, glycerol and ethyl-lactate proved to be good co-solvents of nicotine in water. On the other hand, the inorganic salts Na3PO4 and NaCl showed remarkable salting-out effects in nicotine aqueous solutions, achieved using very small quantities of these salt. The effects of the ionic liquid (molten salt) ECOENG 212®, were, however, much more complex. Depending on its concentration in the solvent, it exhibited either a co-solvent (salting-in) effect or an anti-solvent one. This behaviour is very interesting both from the fundamental and the applications point of view.
UR - http://www.scopus.com/inward/record.url?eid=2-s2.0-80053386923&partnerID=MN8TOARS
UR - https://www.sciencedirect.com/science/article/pii/S0378381211004018?via%3Dihub
U2 - 10.1016/j.fluid.2011.08.022
DO - 10.1016/j.fluid.2011.08.022
M3 - Article
SN - 0378-3812
VL - 310
SP - 198
EP - 206
JO - Fluid Phase Equilibria
JF - Fluid Phase Equilibria
IS - 1-2
ER -