Temperature Effect on the Liquid−Liquid Equilibria for Some Aliphatic Alcohols + Water + K₂CO₃ Systems

Abstract

The liquid−liquid equilibrium (LLE) data were measured for the systems ethanol + water + K2CO3, 1-propanol + water + K2CO3,2-propanol + water + K2CO3, and 2-methyl-2-propanol + water + K2CO3 at (298.15, 308.15, and 318.15) K. A two-parameter equation was used for the correlation of the experimental tie-line data. Good agreement was obtained with the experimental tie-line data with this model.

Liquid–liquid equilibrium of 1-propanol, 2-propanol, 2-methyl-2-propanol or 2-butanol+sodium sulfite+water aqueous two phase systems

“…The obtained LLE data in this work along with the ones reported previously for some other alcohol + water + salt systems [26][27][28][29] were fitted to Eqs. (2) and (3) to find a relation between the saltingout ability and k ca coefficient, and are reported in Tables 6 and 7, respectively.…”

“…Also, to study the effect of temperature on the phase separation ability of the studied systems the cloud point data as a function of alcohol mole fractions at T = 293.15-323.15 K with 5 K intervals was measured. Also, the use of the Setschenow-type equations to study the slating-out effect of the mentioned ATPSs along with some previously studied alcohol + salt + water systems [26][27][28][29][30][31][32][33] was discussed. Moreover, the modified segment based Wilson equation [23] was generalized to represent the mixed solvent electrolyte systems and the performance of this model in the correlation of the studied ATPSs was examined.…”

Thermodynamic investigation of the ATPSs composed of some (aliphatic alcohol+sodium carbonate+water) ternary systems

“…Also, Greve and Kula [8] have used the alcohol-saltwater ATPSs to extract the salt from (polymer + salt + water) protein extraction systems to minimize the environmental pollution as well as to economize on the use of chemicals. Other research groups have also focused on the measurement of phase equilibrium data for the (alcohol + salt + water) ATPSs [9][10][11][12][13]. Some common kosmotropic salts and different alcohols have been used to form effective ATPSs in the studied systems.…”

“…Some common kosmotropic salts and different alcohols have been used to form effective ATPSs in the studied systems. The most common kosmotropic salts consist of selective cations such as sodium, potassium or ammonium and anions such as phosphate, sulfate, hydroxide, or carbonate [8][9][10][11][12][13]. However, the use of biodegradable salts is more desirable, since they are nontoxic and can be discharged into biological wastewater plants in the separation of the biological macromolecules.…”

“…Furthermore, the salts composed of carbonate anion and alkali metal cations are biodegradable and recently the LLE of sodium, potassium, or cesium (carbonate + aliphatic alcohols + water) ternary systems have been reported by authors [13][14][15]. In this regard, our group decided to study the thermodynamics of different ATPSs composed of different salts and some alcohols to obtain adequate information about the physicochemical properties of these ATPSs.…”