Investigation on molecular interaction studies of binary mixture of DEHPA and petrofin at 298.15 K

ABSTRACT

The present article reports the values of density (ρ₁₂), molar volume (V₁₂), apparent molar volume (V_ɸ), dielectric constant (ϵ₁₂), molar polarisation (P₁₂) and molar refraction (R₁₂) of binary mixture of di-2-ethylhexyl phosphoric acid (DEHPA) and petrofin at various compositions. The excess properties such as V^E, ϵ^E, ΔnD, P^E and R^E have been calculated to throw light on the existence of interaction between the DEHPA and petrofin molecules in the binary mixture. The values of V^E and R^E were found to be positive while the values of ϵ^E, ΔnD and P^E were negative over the entire composition showing weak interaction between the two unlike molecules in the mixture. The Kirkwood-correlation factors (g) have been evaluated to know the nature of interaction prevailing in DEHPA and petrofin. These data provide useful information regarding interaction between self-associated protic DEHPA and non-associated petrofin which in turn helps the metallurgist to use DEHPA diluted with petrofin as effective solvent in extraction of metals.

KEYWORDS:

• DEHPA
• petrofin
• excess parameters
• Kirkwood correlation factor

Acknowledgements

The authors express their gratitude to the authorities of Siksha ‘O’ Anusandhan University for their kind support and cooperation. One of the authors (Swagatika Satpathy) is thankful to Department of Science & Technology, Govt. of India, for awarding her DST-INSPIRE (Innovation in Science Pursuit for Inspired Research) fellowship to carry out the research work.

Disclosure statement

No potential conflict of interest was reported by the authors.