Solid solution hinders the extraction of bromine resources from bittern.To separate chlorine-brominebased solid solution in bittern tail solution,the solubilities of the quaternary system KCl-KBr-NaCl-NaBr-H_(2)O and ...Solid solution hinders the extraction of bromine resources from bittern.To separate chlorine-brominebased solid solution in bittern tail solution,the solubilities of the quaternary system KCl-KBr-NaCl-NaBr-H_(2)O and its ternary subsystem NaBr-KBr-H_(2)O at 333.15 K were determined by the isothermal dissolution method,and the corresponding phase diagrams were conducted.An improved model was employed to predict the solubilities of the quaternary system KCl-KBr-NaCl-NaBr-H_(2)O at 333.15 K.The calculated results coincide with the experimental values,implying that the prediction method is feasible.A closed loop crystallization process for the separation of chlorine-bromine-based solid solution in bittern tail solution was proposed and NaBr was obtained with a purity of 98.23%.展开更多
基金supported by the National Natural Science Foundation of China(22478095 and 22008049)Hebei Provincial Key Research Projects(22374101D)+4 种基金Scientific Research Projects of Colleges and University in Hebei Province(QN2023007)Central Guidance Project for Local Science and Technology Development from S&T Program of Hebei(246Z1009G)Special Proof-of-concept Project on Basic Research from S&T Program of Hebei(E2024402143)Science and Technology Project of Hebei Education Department(CXY2023004)Hebei University of Engineering Doctoral Scientific Research Start-up Foundation(SJ2401002210).
文摘Solid solution hinders the extraction of bromine resources from bittern.To separate chlorine-brominebased solid solution in bittern tail solution,the solubilities of the quaternary system KCl-KBr-NaCl-NaBr-H_(2)O and its ternary subsystem NaBr-KBr-H_(2)O at 333.15 K were determined by the isothermal dissolution method,and the corresponding phase diagrams were conducted.An improved model was employed to predict the solubilities of the quaternary system KCl-KBr-NaCl-NaBr-H_(2)O at 333.15 K.The calculated results coincide with the experimental values,implying that the prediction method is feasible.A closed loop crystallization process for the separation of chlorine-bromine-based solid solution in bittern tail solution was proposed and NaBr was obtained with a purity of 98.23%.
