Yaroslavl, Yaroslavl, Russian Federation
The article deals with thermodynamics of butadiene-1,3 dissolution in aqueous-ammonia solutions of potassium nitrate at the temperature range of 20 80 0C. Based on the data obtained we found that the solubility of butadiene-1,3 in aqueous-ammonia solutions follows the Henry's law. The potassium nitrate has a desalinizing effect on the solubility of butadiene-1,3 which decreases with increasing temperature. The addition of ammonia to water and aqueous solutions of potassium nitrate increases the solubility of butadiene-1,3. We have determined the thermodynamic functions of the dissolution process of butadiene-1,3, and the thermodynamic characteristics of the hydrated hydrocarbon in aqueous-ammonia solutions of potassium nitrate. The increase of dissolution heat of butadiene-1,3 in aqueous ammonia solution of potassium nitrate confirms the assumption of hydrogen bonding between hydrogen atoms of ammonia molecule and p-electrons of butadiene-1,3. Comparison of the numerical values of thermodynamic functions of butadiene-1,3 and 2-methylpropene dissolution process showed that both enthalpy and entropy changes increase with increasing degree of unsaturation of the mole-cule.
thermodynamic characteristics, butadiene-1,3, solubility, aqueous-ammonia solutions, potassium nitrate, desalting, Henry's coefficients
1. Smirnova, E.A. (2020) Stability of complex compounds of silver (I) and copper (I) ions with unsaturated hydrocarbons and ammonia, From Chemistry towards Technology Step-By-Step, 1(1), pp. 57-62. DOI:https://doi.org/10.52957/2782I900_2020_01_56 [online]. Available at: http://chemintech.ru/index.php/tor/2020tom1n1 (in Russian).
2. Smirnova, E.A., Latypova, O.I. & Pobegalova, D.N. (2008) Study of dissolubility of unsaturated hydrocarbons in water and water-ammonia solutions of electrolytes, Izvestiya vuzov. Khimiya i khimicheskaya tekhnologiya, 51(8), pp. 22-24 (in Russian).
3. Mazunin, S.A. & Chechulin, V.L. (2012) Desalination as a physical and chemical basis for low-waste methods of potassium and ammonium phosphate production. Perm: PGNIU (in Russian).
4. Mazunin, S.A., Panasenko, V.A., Zubarev, M.P. & Mazunina, E.L. (1999) Study of dissolubility in system Na+, NH4+/HCO3-, Cl- - H2O at 15, 20, 25 and 30 °C, Zhurnal neorganicheskoj khimii, 44(6), pp. 999–1007 (in Russian).
5. Lucyk, A.I., Rudakov, B.E. & Gundilovich, G.G. (1992) Dissolubility of hydrocarbons in the water-nitric acid system, Ukrainskij himicheskij zhurnal, 58(8), pp. 646-650 (in Russian).
6. Mochalin, V.N. (2000) Thermodynamics of dissolution of non-electrolytes in the water-acetic acid and water-sulphuric acid systems. PhD. Donetsk (in Russian).
7. Mirgorod, Y.A. (2010) Liquid-liquid phase transition in aqueous solutions of n-hydrocarbons and am-phiphiles, Pis'ma v zhurnal tekhnicheskoj fiziki, 36(19), pp. 37-43 (in Russian).
8. Mirgorod, Y.A. (2009) Thermodynamic analysis of the structure of aqueous solutions of C12-C18 hydrocar-bons, Zhurnal strukturnoj khimii, 50(3), pp. 478-492 (in Russian).
9. Buchanan, P., Aldiwan, N., Soper, A. K., Creek, J.L. & Koh, C.A. (2005) Decreased structure on dissolving methane in water, Chem. Phys. Lett., 415(1), pp. 89-93. DOI:https://doi.org/10.1016/j.cplett.2005.08.064.
10. Tsonopoulos C. (1999) Thermodynamic analysis of the mutual solubility of normal alkanes and water, Fluid Phase Equilibria, 156, pp. 21-33. DOI:https://doi.org/10.1016/S0378-3812(99)00021-7.
11. Mirgorod, Y.A. (2014) Polyamorphic liquid-liquid transition in aqueous solutions of n-hydrocarbons and surfactants: evaluation of enthalpy, isothermal compressibility and internal pressure, Izvestiya Yugo-Zapadnogo gos. un-ta. Ser. Tekhnika i tekhnologii, (3), pp. 91-98 (in Russian).
12. Siva, Prasad V., Rajagopal, E. & Manohara, M.N. (2010) Thermodynamic properties of ternary mixtures con-taining water, 2-ethoxyethanol, and t-butanol at 298.15 K, Russian Journal of Physical Chemistry, 84, pp. 2211 2216. DOI:https://doi.org/10.1007/S10973-005-0651-4.
13. Dougan, L., Bates, S.P., Hargreaves, R., Fox, J.P. (2004) Methanol-water solutions: a bi-percolating liquid mix-ture, J. Chem. Phys., 121, pp. 6456-6462. DOI:https://doi.org/10.1063/1.1789951.
14. Petersen, C. Tielrooij, K.-J. & Bakker, H. J. 2009Strong temperature dependence of water reorientation in hydrophobic hydration shells, J. Chem. Phys., 130(21), 214511. DOI:https://doi.org/10.1063/1.3142861.
15. Lyons, A.S., Rick, Jr. & Rick, S.W. (2021) Simulations of water and hydrophobic hydration using a neural net-work potential, Chemical Physics, (7), 11 p. DOI: orghttps://doi.org/10.48550/arXiv.2101.02754 [online]. Available at: https://arxiv.org/pdf/2101.02754.pdf
16. Shiraga, K., Suzuki, T., Kondo, N. & Ogawa, Y. (2014) Hydration and hydrogen bond network of water around hydrophobic surface investigated by terahertz spectroscopy, J. Chem. Phys., 141(23), 235103. DOI: org/10.1063/1.4903544.
