Abstract The control variable method with X-ray powder diffraction characterization technique were employed to explore the influencing factors of precipitate form, crystallinity as well as experimental time and product yields in purification of crude salt. The research result indicated that the best conditions for the second filtration of crude salt purification are as follows:the stirring speed is 1 rotation per second, the dosage of crude salt is 8 grams, and the heating time is 12 minutes. The precipitation separate out all in crystal form under the above condition and the product yield in 76.25%.
LIU Xiao-Jun, HE Shan, XIE Hao-Yuan, SU Zi-Shan, XIE Wei-Tao, QIU Yan-Xuan. Exploration Research on Method Improvement About Purification of Crude Salt[J]. Chinese Journal of Chemical Education, 2019, 40(2): 40-43.
