There are many salt lakes in the west of China and a long coastline in the east. The sea lake brine is rich in sodium, potassium, lithium, magnesium and other resources. The extraction of sodium chloride and potassium chloride from Haihu brine has been widely used in traditional chemical industries such as salt, soda ash, caustic soda, and potash fertilizer production. The use of residual magnesium chloride in brine after sodium and potassium extraction has gradually become a constraint on the utilization of Haihu brine. Factors and technical bottlenecks. For example, the current annual production scale of potassium chloride in the Chaerhan Salt Lake has reached several million tons, and the by-product magnesium chloride is about several million tons. A large amount of magnesium chloride is directly discharged into the salt lake without utilization, resulting in the local enrichment of magnesium salt. It caused a waste of resources and destroyed the resource structure of the salt lake to a certain extent, seriously affecting the continuous development and utilization of the salt lake's potassium resources. Using salt lake magnesium chloride to produce high-purity magnesium oxide industrial products is one of the effective solutions. However, the current technology of producing magnesium oxide from brine magnesium chloride has the disadvantages of heavy pollution, high energy consumption and high water consumption. Therefore, the development of the clean utilization technology of brine magnesium chloride is of great significance for the comprehensive and sustainable use of China's sea lake brine water resources. With the support of the National Natural Science Foundation of China and the Chinese Academy of Sciences, a research group led by researcher Li Zhibao of the Institute of Process Engineering successfully carried out basic research on the thermodynamics and phase diagrams of brine systems, and successfully proposed a joint method to produce high-purity magnesium oxide from brine magnesium chloride Ammonium chloride technology. This technology uses ammonium carbonate precipitation to separate magnesium in brine, and obtains magnesium carbonate hydrate to produce magnesium oxide through calcination, and uses the salting-out effect of magnesium chloride to recover all the ammonium chloride in the ammonium-rich waste liquid after magnesium precipitation, while forming materials The circulation solves the problem of large sewage discharge in the production of magnesium oxide. This process has low cost, high added value, and has the advantages of energy saving and environmental friendliness, which provides a feasible technical approach for the sustainable use of salt lake resources in China. Related results were published in AIChE Journal (2011; 57: 1595-1606). NH4Cl-MgCl2-H2O system phase diagram and ammonium chloride recovery process flow chart Hospital Treatment Cart,Medical Treatment Cart,Mobile Treatment Cart Jiangmen Jia Mei Medical Products Co.,Ltd. , https://www.jmjiameimedical.com