338.15 K下Na+, K+, Ca2+//Cl - - h2o四元体系及其子系统的相平衡和相图

IF 2.1 3区 工程技术 Q3 CHEMISTRY, MULTIDISCIPLINARY
Ruxue Yao, Yang Ge, Jiangtao Song, Fei Yuan*, Yafei Guo and Tianlong Deng*, 
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引用次数: 0

摘要

柴达木盆地具有富钾、富钙的高温油田卤水资源。由于相图是指导油田卤水中钾资源开发的无机化学工程分离纯化的有力工具,本文首次采用等温溶解平衡法报道了338.15 K下的第四系油田卤水体系(Na+, K+, Ca2+//Cl - h2o)及其两个子系统((Na+, Ca2+//Cl - h2o)和(K+, Ca2+, //Cl - h2o)。采用化学分析和x射线衍射相结合的方法对平衡固相的组成进行了分析和鉴定。在338.15 K时,四元体系有NaCl、KCl、KCl·CaCl2和CaCl2·2H2O四个结晶区,在338.15 K时出现了不一致的双盐KCl·CaCl2。该研究有助于热力学数据的丰富和盐基钾资源的开发。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Phase Equilibria and Phase Diagram of the Quaternary System (Na+, K+, Ca2+//Cl– -H2O) and Its Subsystems at 338.15 K

Phase Equilibria and Phase Diagram of the Quaternary System (Na+, K+, Ca2+//Cl– -H2O) and Its Subsystems at 338.15 K

The Qaidam Basin has potassium- and calcium-rich oil field brine resources at high temperatures. Since the phase diagram is a powerful tool to guide the separation and purification of inorganic chemical engineering for the development of potassium resources in oil field brine, the quaternary oil field brine system (Na+, K+, Ca2+//Cl -H2O) and its two subsystems ((Na+, Ca2+//Cl -H2O) and (K+, Ca2+, //Cl -H2O)) at 338.15 K were reported for the first time by the isothermal dissolution equilibrium method. The compositions of the equilibrium solid phases were analyzed and identified by combined chemical analyzing and X-ray diffraction. The quaternary system has four crystallized regions corresponding to NaCl, KCl, KCl·CaCl2, and CaCl2·2H2O at 338.15 K, and the incongruent double salt KCl·CaCl2 occurred at 338.15 K. The study facilitates the enrichment of thermodynamic data and exploits brine-based potassium resources.

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来源期刊
Journal of Chemical & Engineering Data
Journal of Chemical & Engineering Data 工程技术-工程:化工
CiteScore
5.20
自引率
19.20%
发文量
324
审稿时长
2.2 months
期刊介绍: The Journal of Chemical & Engineering Data is a monthly journal devoted to the publication of data obtained from both experiment and computation, which are viewed as complementary. It is the only American Chemical Society journal primarily concerned with articles containing data on the phase behavior and the physical, thermodynamic, and transport properties of well-defined materials, including complex mixtures of known compositions. While environmental and biological samples are of interest, their compositions must be known and reproducible. As a result, adsorption on natural product materials does not generally fit within the scope of Journal of Chemical & Engineering Data.
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