Empirical equations for the prediction of third phase formation limits in the extraction of thorium nitrate by tri-iso-amyl phosphate (TiAP)

Abstract

Third phase formation in the extraction of Th(IV) by TiAP in various n-alkane diluents was investigated under different conditions. The limiting organic concentrations (LOC) for third phase formation for TiAP/nalkane/thorium nitrate systems were measured as a function of various parameters for deriving empirical equations with respect to extractant concentration, equilibrium aqueous phase nitric acid concentration ([HNO 3 ] aq,eq ), temperature and number of carbon atoms per diluent for the prediction of LOC. Our results show a very good agreement between the LOC values calculated with empirical equations derived from two different approaches.

Empirical equation to estimate viscosity of paraffin

“…The rheological behaviour of a PCM is important in the design and simulation of a TES system because it is not constant with temperature. Empirical equations are used in chemical engineering and other scientific and engineering fields [9] [10] [11] for the estimation of properties of chemicals and are applied in simulations and other design steps of a system [12].…”

Empirical equations for viscosity and specific heat capacity determination of fatty acids

“…The estimation of properties with empirical equations is used in chemical engineering. These are material and time saving tool to know in advance the material behaviour with no need of experimental tests [13][14][15]. However, the TES community does not use this tool widely.…”