TY - JOUR

T1 - Effect of Deep Eutectic Solvents Based on Choline Chloride as Extractants on the Separation of the 1-Butanol–1-Butyl Formate System: Experimental Study and Comparative Analysis

AU - Smirnov, Alexander

AU - Toikka, Maria

PY - 2024/5/9

Y1 - 2024/5/9

N2 - The current work is dedicated to the study of deep eutectic solvents (DES) as extractants for the purification of esters from alcohols. Separation efficiency of the mixture of 1-butanol-1-butyl formate using various deep eutectic solvents based on choline chloride with glycerol, ethylene glycol, urea, and glutaric acid was evaluated. The liquid-liquid equilibrium (LLE) data for the pseudoternary systems of 1-butanol-1-butyl formate-deep eutectic solvents at 293.15 and 313.15 K and atmospheric pressure were obtained. The quantitative analysis was carried out using 1H nuclear magnetic resonance (NMR) spectroscopy. The separation efficiency was evaluated based on the distribution coefficients and selectivity values. DES with urea and glycerol showed the highest separation selectivity, while DES with ethylene glycol and glutaric acid demonstrated the highest alcohol distribution coefficient. The reliability of the internal consistency of the liquid-liquid equilibrium data has been demonstrated by calculating the correlation equations of Othmer-Tobias, Hand, and Bachman. To confirm the experimental data, the LLE was calculated using the nonrandom two-liquid (NRTL) equation. It was shown that the standard deviation (σ) did not exceed 1.27%. A comparative analysis was carried out on the dependence of separation efficiency in other alcohol-ester systems using the same deep eutectic solvents.

AB - The current work is dedicated to the study of deep eutectic solvents (DES) as extractants for the purification of esters from alcohols. Separation efficiency of the mixture of 1-butanol-1-butyl formate using various deep eutectic solvents based on choline chloride with glycerol, ethylene glycol, urea, and glutaric acid was evaluated. The liquid-liquid equilibrium (LLE) data for the pseudoternary systems of 1-butanol-1-butyl formate-deep eutectic solvents at 293.15 and 313.15 K and atmospheric pressure were obtained. The quantitative analysis was carried out using 1H nuclear magnetic resonance (NMR) spectroscopy. The separation efficiency was evaluated based on the distribution coefficients and selectivity values. DES with urea and glycerol showed the highest separation selectivity, while DES with ethylene glycol and glutaric acid demonstrated the highest alcohol distribution coefficient. The reliability of the internal consistency of the liquid-liquid equilibrium data has been demonstrated by calculating the correlation equations of Othmer-Tobias, Hand, and Bachman. To confirm the experimental data, the LLE was calculated using the nonrandom two-liquid (NRTL) equation. It was shown that the standard deviation (σ) did not exceed 1.27%. A comparative analysis was carried out on the dependence of separation efficiency in other alcohol-ester systems using the same deep eutectic solvents.

UR - https://www.mendeley.com/catalogue/797a8095-056b-3fca-8106-d98e82052adb/

U2 - 10.1021/acs.jced.4c00058

DO - 10.1021/acs.jced.4c00058

M3 - Article

VL - 69

SP - 1917

EP - 1927

JO - Journal of Chemical & Engineering Data

JF - Journal of Chemical & Engineering Data

SN - 0021-9568

IS - 5

ER -