Solid-liquid Equilibria in the Ternary System (NaCl+SrCl2+H2O) and (KCl+SrCl2+H2O) at 288.15 K and 0.1 Mpa

doi:10.1007/s40242-018-7395-8

Chemical Research in Chinese Universities ›› 2018, Vol. 34 ›› Issue (5): 803-807.doi: 10.1007/s40242-018-7395-8

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Solid-liquid Equilibria in the Ternary System (NaCl+SrCl₂+H₂O) and (KCl+SrCl₂+H₂O) at 288.15 K and 0.1 Mpa

LI Dongchan^1,2, FAN Rong¹, YANG Sennan¹, ZHANG Ziyi¹

1. College of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, P. R. China;
2. Engineering Research Center of Seawater Utilization Technology, Ministry of Education, Hebei University of Technology, Tianjin 300130, P. R. China

Received:2017-12-06 Revised:2018-07-10 Online:2018-10-01 Published:2018-08-03
Contact: LI Dongchan,Email:dongchanli@126.com E-mail:dongchanli@126.com
Supported by:
Supported by the National Natural Science Foundation of China(Nos.21406048, U1507109), the Natural Science Foundation of Hebei Province, China(No.B2017202198), and the Natural Science Foundation of Tianjin, China(Nos.17JCYBJC19500, 15JCQNJC06100).

Abstract

Abstract: Solid-liquid phase equilibria of the two ternary systems (NaCl+SrCl₂+H₂O) and (KCl+SrCl₂+H₂O) at T=288.15 K and p=0.1 MPa were studied using the isothermal dissolution equilibrium method. Solubilities of the equilibrium liquid phase were determined, and the solids were also investigated by the Schreinemaker method of wet residues. In the ternary system (NaCl+SrCl₂+H₂O) at 288.15 K, there is one invariant point corresponding to (NaCl+SrCl₂·6H₂O) and two crystallization regions corresponding to NaCl and SrCl₂·6H₂O. The crystallized area of SrCl₂·6H₂O decreased with the increasing temperature, while that of NaCl increased slightly. In the ternary system (KCl+SrCl₂+H₂O) at 288.15 K, there is one invariant point(KCl+SrCl₂·6H₂O) and two crystallization regions corresponding to KCl and SrCl₂·6H₂O. Both systems belong to a simple eutectic type, and neither double salts nor solid solutions were formed. On the basis of Pitzer-Harvie-Weare model, the solubilities of the two systems at 288.15 K were demonstrated. A comparison showed that the calculated solubilities agreed well with the experimental data.

Key words: Phase equilibrium, Solubility, Phase diagram, Oilfield brine

LI Dongchan, FAN Rong, YANG Sennan, ZHANG Ziyi. Solid-liquid Equilibria in the Ternary System (NaCl+SrCl₂+H₂O) and (KCl+SrCl₂+H₂O) at 288.15 K and 0.1 Mpa[J]. Chemical Research in Chinese Universities, 2018, 34(5): 803-807.

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Solid-liquid Equilibria in the Ternary System (NaCl+SrCl₂+H₂O) and (KCl+SrCl₂+H₂O) at 288.15 K and 0.1 Mpa

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