Thermodynamic Properties of LiCl + MgSO4+ H2O at Temperatures from 273.15 K to 373.15 K and Representation with Pitzer Ion-Interaction Model

2016 ◽  
Vol 61 (7) ◽  
pp. 2277-2291 ◽  
Author(s):  
Jie Zhang ◽  
Dongdong Li ◽  
Yan Yao ◽  
Bai Sun ◽  
Dewen Zeng ◽  
...  
Keyword(s):  
Thermodynamic Properties ◽  
Interaction Model ◽  
Ion Interaction Model

Solubility Prediction for the Reciprocal Quaternary System (Li+, Mg2+//Cl-, SO42-–H2O) at 273.15 K Using Pitzer Ion-Interaction Model

2012 ◽  
Vol 549 ◽  
pp. 437-440 ◽  
Author(s):  
Shi Qiang Wang ◽  
Ya Fei Guo ◽  
Tian Long Deng
Keyword(s):  
Quaternary System ◽  
Salt Lake ◽  
Interaction Model ◽  
Linear Regression Method ◽  
Solubility Prediction ◽  
Temperature Dependent ◽  
Solubility Predictions ◽  
Multiple Linear Regression Method ◽  
Ion Interaction Model ◽  
Salt Lake Brine

Solubilities of the reciprocal quaternary system (Li+, Mg2+//Cl-, SO42-–H2O) at 273.15K were calculated using Pitzer and its extended HW model. The values of the Pitzer single-salt parameters β(0), β(1), β(2)and Cφfor LiCl, MgCl2, Li2SO4, and MgSO4, the mixed ion-interaction parameters θLi,Mg, θCl,SO4, ψLi,Mg,Cl, ψLi,Mg,SO4, ψLi,Cl,SO4and ψMg,Cl,SO4, and the Debye–Hückel parameter Aφin the system at 273.15K were derived either temperature-dependent equation or through fitting solubility data of the ternary system by multiple linear regression method. Based on the Jänecke indexes, the phase diagram was plotted. This study affords the necessary parameters for solubility predictions of complicated systems and establishes a theoretical basis for the separation of these valuable minerals from salt lake brine.

A Pair-Wise Interaction Model for Multi-Sublattice Phases

1982 ◽  
Vol 19 ◽  
Author(s):  
J.N. Pratt ◽  
I.P. Jones
Keyword(s):  
Free Energy ◽  
Thermodynamic Properties ◽  
Interaction Model ◽  
Heat Of Formation ◽  
Nearest Neighbour ◽  
Interaction Energies ◽  
Bond Energies ◽  
Interaction Models ◽  
Ordered Alloys

ABSTRACTThe use of simple nearest neighbour pair-wise interaction models for the description of the thermodynamic properties of ordered alloys is reviewed and extended to the treatment of phases containing several sublattices. Employing individual sublattice occupation parameters to define atomic distributions, enthalpies corresponding to these are described by the summation of pair-wise interaction energies over all the resulting first co-ordination shell neighbours. Invariant like and unlike bond energies are assumed, their respective values being estimated using heats of vaporisation of the elements and a heat of formation of the phase at a single composition. Combination of the enthalpies with corresponding configurational entropies yields an expression for the free energy of the phase which may be minimised with respect to variation of the sublattice occupation parameters. This leads to the prediction of the stable atomic distributions and the variation of these and the thermodynamic properties with composition. The application of the model to sigma phases and other multi-sublattice structures is discussed

Application of the Ion-interaction Model to the Solubility Prediction of LiCl-HCl-MgCl2-H2O System at 20 °C

2005 ◽  
Vol 23 (8) ◽  
pp. 953-956 ◽  
Author(s):  
Li Ya-Hong ◽  
Song Peng-Sheng ◽  
Xia Shu-Ping ◽  
Li Wu ◽  
Gao Shi-Yang
Keyword(s):  
Interaction Model ◽  
Solubility Prediction ◽  
Ion Interaction Model
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