Research on hydration of magnesium oxide from roasting hydrated magnesium chloride;

In this article, the key problems on the preparation of high purity anhydrous magnesium chloride from hydrated magnesium chloride were discussed.

Using hydrated magnesium chloride and ammonia to produce magnesium hydrate is a clean project in rational-using lake/sea magnesium resources.

Preparation techniques and development trend of anhydrous magnesium chloride;

Preparation and characterization of anhydrous magnesium chloride by reaction of ammonia and ammonium carnallite;

Based on hydrous magnesium chloride azeotroped and distilled with high boiling point solvents,the high-purity anhydrous magnesium chloride whose purity is more than 99% is prepared by a series of processes which were obtained as follows:(1) dissolve the hydrated magnesium chloride in ethylene glycol,(2) dehydrate the mixture in distillation at normal or negative pressure,(3) ami.

The process can employ magnesium chloride hexahydrate as raw material directly.

Based on quaternary phase diagram of Na+,Mg2+//Cl-,SO2-4·H2O,magnesium sulfate monohydrate and sodium chloride were prepared by using mother liquid of sodium sulfate and magnesium chloride hexahydrate as raw materials.