Analysis of Abnormal Phenomena in High Magnesium Boron Containing Salt Brine System

作者：Wu Zhi-Ming^*; Cui Xiang-Mei; Zheng Mian-Ping

来源：Chinese Journal of Inorganic Chemistry, 2012, 28(1): 30-34.

• boron containing salt brine
• salt formation by dilution
• supersaturated solubility
• magnesium chloride
• pH value

Such phenomena as "supersaturated solubility", "salt formation by dilution" and "solubility increase of homonymy ion" exist in high magnesium boron containing salt brine system. Our research indicates that the magnesium chloride solution is neutral with medium or low concentration. It shows acidic property with high concentration and the pH value is lower than 4.5 when saturated. But many types of magnesium borate minerals are alkaline ones with pH value higher than 8.0. We know in general acid and base could hardly co-exist in an aqueous solution, but magnesium borate and magnesium chloride in high magnesium boron containing salt brine system do owing to the possession of the homonymy ion. The above mentioned abnormal phenomena can be satisfactorily interpreted with special acidity change of magnesium chloride solution and some related phase chemistry data.

• 出版日期2012-1
• 单位青海大学