Anhydrous magnesium chloride can be produced by two methods: industrial magnesium chloride dehydration and recrystallization and chemical by-products.
Industrial magnesium chloride hexahydrate produces anhydrous magnesium chloride. After repeated processes of heating, concentration and recrystallization, energy consumption and strict process, the price of anhydrous magnesium chloride is not low. Using this as a raw material to produce high-grade electrolytic magnesium metal does not need to make a solidification blending agent for magnesium oxychloride materials. In addition, the anhydrous magnesium chloride produced by this process also has some alkali metal chloride salts. The use of anhydrous magnesium chloride cannot be said to be free of halogen and frost. Today, I will take you to understand the common problems in the use of magnesium chloride hexahydrate.
1). Some companies mistakenly believe that magnesium chloride can overcome the halogen and frost phenomenon of magnesium oxychloride materials. This is unrealistic language. If you cannot correctly grasp the relationship between the correct quantitative reaction molar ratio of magnesium oxide and magnesium chloride in the material composition, you cannot make rational use of additives and the correct technical system. Even if anhydrous magnesium chloride is used, halogens and frost will be generated.
2). Since this type of anhydrous magnesium chloride is an industrial by-product, the content of magnesium chloride varies, and the variation value is between 92% and 97%. The user needs to analyze the 2% content of MgCl and cannot trust the supplier's propaganda. Otherwise, it will affect the quantitative relationship between magnesium oxide and magnesium chloride, causing halogen and frost.
3). When using anhydrous magnesium chloride to make the halogen solution, please pay attention to adding anhydrous magnesium chloride to the water several times, and do not add water to the anhydrous magnesium chloride. Otherwise, it will cause violent boiling, causing chlorine-containing water vapor, and harming human health. Since the dissolution of anhydrous magnesium chloride is a violent exothermic reaction, the 2% concentration of the brine MgCl at this time rises from 19.13% to 20.55%, and the Baume degree of the brine is 2.5%. In other words, the performance behavior of anhydrous magnesium chloride prepared brine solution is different from the dissolution behavior of industrial magnesium chloride.
The common problems in the use of magnesium chloride hexahydrate are introduced here. Welcome to inquire.