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• 作者：Rui-zhi Cui ; Shi-hua Sang ; Qing-zhu Liu ; Pan Wang
• 刊名：Journal of Chemical & Engineering Data
• 出版年：2014
• 出版时间：July 10, 2014
• 年：2014
• 卷：59
• 期：7
• 页码：2252-2257
• 全文大小：281K
• ISSN：1520-5134

文摘

According to the compositions of the underground gasfield brines in the west of Sichuan Basin, in China, solid鈥搇iquid equilibria in the quaternary systems KBr鈥揔₂SO₄鈥揔₂B₄O₇鈥揌₂O and NaBr鈥揘a₂SO₄鈥揘a₂B₄O₇鈥揌₂O at 298 K were measured by isothermal solution saturation method. The solubilities of salts and the densities of saturated solutions in these quaternary systems were determined. Using the experimental data, phase diagrams, water content diagrams, and solution density diagrams were constructed. The two phase diagrams were simple cosaturation type without complex salt and solid solution. The phase diagram of the quaternary system KBr鈥揔₂SO₄鈥揔₂B₄O₇鈥揌₂O has one invariant point, three univariant curves as the boundary of KBr, K₂SO₄ and K₂B₄O₇路4H₂O crystallization fields. The quaternary system NaBr鈥揘a₂SO₄鈥揘a₂B₄O₇鈥揌₂O at 298 K consisted of five univariant curves, two invariant points and four crystallization regions of Na₂B₄O₇路10H₂O, Na₂SO₄, Na₂SO₄路10H₂O, and NaBr路2H₂O.