Liquid–Liquid Equilibria for Ternary (Methyl Propyl Ketone + Hydroquinone or Resorcinol + Water) Systems at 298.15, 318.15, and 333.15 K

Abstract

Experimental liquid–liquid equilibria (LLE) data for ternary (methyl propyl ketone + hydroquinone + water) and (methyl propyl ketone + resorcinol + water) systems were determined under atmospheric pressure at T = 298.15, 318.15, and 333.15 K. Distribution coefficients and separation factors were calculated to evaluate extraction effectiveness. Hand, Bachman, and Othmer–Tobias equations were utilized to confirm consistency of experimental LLE data. Thermodynamic NRTL and UNIQUAC models were used to correlate experimental LLE data, and corresponding binary interaction parameters were obtained. The estimated data from the two models agree well with experimental LLE data. The NRTL model gives a better agreement than the UNIQUAC model for ternary (methyl propyl ketone + hydroquinone or resorcinol + water) systems.

Synergistic Extraction of Hydroquinone from Aqueous Solution with Solvent Mixture of 2-Pentanone and n-Pentanol: Liquid–Liquid Equilibria and Data Correlation

“…The LLE data measurement apparatus and procedure in our laboratory is similar to our previous work . The LLE experiments for the quaternary (2-pentanone + n -pentanol + hydroquinone + water) system were carried out in a 100 mL glass equilibria cell.…”

“…Therefore, hydroquinone was selected as the representative of polyphenols. A wide range of solvents have been investigated to extract hydroquinone from wastewater, such as methyl isobutyl ketone, methyl butyl ketone, methyl isopropyl ketone, and 2-pentanone, etc. However, compared with methyl isobutyl ketone, these single solvents perform little improvement for the extraction efficiency .…”

“…A wide range of solvents have been investigated to extract hydroquinone from wastewater, such as methyl isobutyl ketone, methyl butyl ketone, methyl isopropyl ketone, and 2-pentanone, etc. However, compared with methyl isobutyl ketone, these single solvents perform little improvement for the extraction efficiency . Synergistic effect has been considered as the important way to increase the distribution coefficient of a single solvent. , Alcohols always have synergistic effect for phenols with other solvents, such as isopropyl ether + n -pentanol, 1-octanol + butyl acetate, and octyl alcohol + benzene .…”

“…Methyl isobutyl ketone is widely used in the phenols recovery process, and the ternary system (methyl isobutyl ketone + hydroquinone + water) was measured by Yang et al Chen et al reported the LLE data for the ternary (methyl butyl ketone + hydroquinone or phenol + water) systems. According to our previous work, the UNIFAC model calculation as well as extraction experiment showed that 2-pentanone is the most suitable single solvent for removal of hydroquinone, and the ternary (2-pentanone + hydroquinone or resorcinol + water) LLE data were measured and correlated by Guo et al Furthermore, Yang et al used the solvent mixture methyl isobutyl ketone and toluene to extract dihydric phenols and investigated the quaternary (methyl isobutyl ketone + toluene + hydroquinone + water) system. However, experimental LLE data of the quaternary (2-pentanone + n -pentanol + hydroquinone + water) system have not been reported in the available literature.…”

Liquid–Liquid Equilibria for the Quaternary System: Diisopropyl Ether + n-Pentanol + Phenol + Water at 298.15 K

“…The LLE data were correlated using NRTL and UNIQUAC models. Based on our previous work, , the value of the nonrandomness α in the NRTL model for binary pairs (mixture solvent + water) and (phenol + water) were set as 0.2, while that for the (mixture solvent + phenol) binary pair was set as 0.3. These values produced better goodness-of-fits.…”