| 摘要 |
<p>PURPOSE: A method for preparing high purity anhydrous magnesium chloride is provided to prepare high purity anhydrous magnesium chloride with uniform quality from ammonium magnesium chloride hydrate through an optimal heat treatment. CONSTITUTION: A method for preparing high purity anhydrous magnesium chloride comprises the steps of: mixing ammonium chloride into a magnesium chloride aqueous solution in which magnesite is dissolved in hydrochloric acid aqueous solution, concentrating and crystallizing the mixture to prepare ammonium magnesium chloride hydrate; heating the ammonium magnesium chloride hydrate in a decompression or vacuum condition; and heating the mixture at the temperature higher than a first heating process.</p> |
