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Citation: Lu Jiu-Fang, Niu Shu-Fang, Li Yi-Gui. Salting Effect of Polar Organic Compound in Electrolyte Solutions(II) An Application of Pitzer Equations in D2EGPA-Alkali Chloride-H₂O Systems[J]. Acta Physico-Chimica Sinica, ;1990, 6(05): 549-555. doi: 10.3866/PKU.WHXB19900508 shu

Salting Effect of Polar Organic Compound in Electrolyte Solutions(II) An Application of Pitzer Equations in D2EGPA-Alkali Chloride-H₂O Systems

1.
Department of Chemistry Engineering, Tsinghua University, Beijing

Received Date: 10 July 1989
Available Online: 15 October 1990

In this paper, the Pitzer equation (1973) and Pitzer-Li equation (1983) are used to correlate the activity coefficient data of di (2-ethyl-hexyl) phosphoric acid (D_2EHPA) in aqueous alkali chlorides (LiCl, NaCl, KCl, RbCl, CsCl and NH_4 Cl), which were determined by P~(32) radioisotope tracer technique. The calculated results show that the Pitzer-Li equation is better than the Pitzer equation, since the ion-solvent short range interaction energy and the ion-ion long range interaction energy are considered in the Pitzer-Li equation. The parameters thus regressed can reflect the sequence of the salting effect for alkali cation series and can explain the salting-out phenomenon for D_2EHPA. It also shows that the ion-water interaction energies are much greater than the ion-D_2EHPA interaction energies in th D_2EHPA-MCl-HCl-H_2O systems.
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Salting Effect of Polar Organic Compound in Electrolyte Solutions(II) An Application of Pitzer Equations in D2EGPA-Alkali Chloride-H2O Systems

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通讯作者: 陈斌, bchen63@163.com

Salting Effect of Polar Organic Compound in Electrolyte Solutions(II) An Application of Pitzer Equations in D2EGPA-Alkali Chloride-H₂O Systems