Phase Diagrams for Liquid-Liquid Equilibrium of Neopentyl Glycol + Sodium Formate + Water

Document Type : Research Article


Chemistry and Chemical School, Henan University of Technology, Zhengzhou, P.R. CHINA


Phase diagrams for the ternary (neopentyl glycol + sodium formate + water) system were measured. Phase equilibrium data were obtained at different temperatures of 333.15, 343.15, and 353.15 K. The effect of temperature on the liquid–liquid phase equilibrium was studied and the length and slope of the tie-line at different temperatures for the conjugate phase were investigated. It was found that the tie-line length decreases and the two-phase area is slightly reduced by increasing temperature. The three fitting parameters of the Merchuk and Pirdashti equations were obtained with the temperature dependence expressed in the linear form, respectively. Compared with the Pirdashti equation, the binodal curves were described satisfactorily with the Merchuk equation, further, the plait points at various temperatures were estimated by extrapolation. The Othmer-Tobias and Hand models were used for the correlation of the phase equilibrium behavior. The correlation coefficients of the models were obtained for the corresponding temperatures. The results showed that it was well fitted with the Othmer-Tobias model by contrast with the Hand model.


Main Subjects

[1] Zhang H., Xu H., Fang X.M., Xu Y.Q., Ding T., Synthesis and Property of a Halogen-Free Flame Retardant Neopentyl Glycol Phenyl Phosphate, Chem. Res., 27(4): 466-469 (2016).
[2] Kamalakar K., Sai Manoj G.N.V.T., Prasad R.B.N., Karuna M.S.L., Novel Acyloxy Derivatives of Branched Mono- and Polyol Esters of Sal Fat: Multiviscosity Grade Lubricant base Stocks, J. Agric. Food Chem., 62(49): 11980-11987 (2014).
[3] Wang M.J., Li Y.W., Zhang X.Y., Sun J., Wang L., Study and Development of Waterborne Acrylic Modified Alkyd Resin, China Coat, 32(3): 57-60 (2017).
[5] Raof N.A., Yunus R., Rashid U., Azis N., Yaakub Z., Palm-Based Neopentyl Glycol Diester: A Potential Green Insulating Oil, Protein Peptide Lett., 25(2): 171-179 (2018).
[6] Ayush P.S., Sakshum K., Sagar P., Harsh H., Yashkumar P., Bhashin M., Preparation and Characterization of Solid-State Neopentyl Glycol / Expanded Graphite Micro Composite for Thermal Energy Storage Applications, Mater. Today: Proc., 47(2): 621-625 (2020).
[7] Lu J.D., Liu X.J., Yan X.Y., The Analysis of Neopentyl Glycol Market, Chem. Ind., 39(2): 52-56 (2021).
[8] Hao Q.L., Development Analysis of Neopentyl Glycol Industry, Fine Spec. Chem., 25(12): 5-8 (2017).
[9] Pirdashti M., Bozorgzadeh A., Ketabi M., Khoiroh I., Phase Equilibria of Aqueous Mixtures of PEG with Formate Salt: Effects of pH, type of Cation, Polymer Molecular Weight and Temperature, Fluid Phase Equilib., 485(4): 158-167 (2019).
[10] Frolkova A., Zakharova D., Frolkova A., Balbenov S., Liquid–Liquid and Liquid–Liquid Equilibrium for Ternary System Water–Acetonitrile–Cyclohexene at 298.15 K, Fluid Phase Equilib., 408(1): 10-14 (2016).
[11] Yang X.C., Li H.X., Cao C.M., Xu L., Liu G.J., Experimental and Correlated Liquid-Liquid Equilibrium Data for Dimethyl Adipate + 1,6-Hexanediol + Water or Ethylene Glycol, J. Mol. Liq., 284(16): 39-44 (2019).
[12] Ahmadi F., Pirdashti M., Arzideh S.M., Khoiroh I., Phase Behavior for 1-Butyl-3-Methylimidazolium Tetrafluoroborate with Sodium Oxalate/Succinate/Formate Aqueous Two-Phase Systems at 298.15 and 308.15 K, J. Dispers. Sci. Technol., 42(1): 67-74 (2020).
[14] Gomis V., Saquete M. D., Font A., García-Cano J., Martínez-Castellanos I., Phase Equilibria of the Water + 1-Butanol + 2-Pentanol Ternary System at 101.3 kPa, J. Chem. Thermodyn., 123(8): 38-45 (2018).
[15] Özmen D., Bekri S., Phase Diagrams for the Aqueous Solutions of Carboxylic Acid with Dipropyl Ether: Experimental and Correlated Data, Iran. J. Chem. Chem. Eng. (IJCCE), 39(6): 173-183 (2020).
[16] Parab P., Bhagwat S., Thermophysical Properties of Ternary Systems Potassium Formate + Propylene Glycol/Glycerol + Water, J. Chem. Eng. Data, 64(1): 234-244 (2019).
[18] Ghanadzadeh Gilani A., Ahmadifar S., Taki T., Experimental and Modeling Study of Liquid Phase Equilibria for (Water + Phosphoric Acid + Sec-Alcohols) Systems, J. Chem. Thermodyn., 135(8): 305-315 (2019).
[20] Reggab S., Merzougui A., Hassiene A., Qjemoui L., Bouredji H., Experimental Data and Modeling of Salt Effect on Liquid-Liquid Equilibrium of the Ternary (Water+1-Propanol+Hexane) System at 298K, Iran. J. Chem. Chem. Eng. (IJCCE), 39(6):199-209 (2020).
[21] Sadeghi B.,Ghamami S., Bimetallic Ag/Co synthesized at liquid/liquid interface with controllable core/shell structuresChem. Eng. Commun., 200(2): 178-184 (2013).
[22] Kong H., Li P., Song Z.D., Zhang Z.Y., Wang Y.F., Liquid-Liquid Equilibria of Ternary Systems Water+ PODE1/PODE2 + Extractants, J. Chem. Eng. Chin. Univ., 34(1): 27-33 (2020).
[24] Huang Q., Yu X.D., Li M.L., Zheng H., Zeng Y., Experimental and Thermodynamic Simulation for Ternary Systems KCl+PEG10000/20000+ H2O at 308.2 K, J. Chem. Eng., 72(4): 1895-1905 (2021).
[26] Cavalcanti K.V.M., Follegatti-Romero L.M., Dalmolin I., Follegatti-Romeroa L. A., Liquid-Liquid Equilibrium for (Water + 5-Hydroxymethylfurfural + 1-Pentanol/1-Hexanol/1-Heptanol) Systems at 298.15 K, J. Chem. Thermodyn., 138(11): 59-66 (2019).