The nature of Magnesium Oxide

Magnesium oxide is commonly known as bitter earth, also known as magnesium oxide, magnesium oxide is an alkaline oxide, with the general nature of alkaline oxides, belonging to cementitious materials. White powder (light yellow for magnesium nitride), odorless, tasteless, non-toxic, is a typical alkaline earth metal oxide, chemical formula MgO. The white powder has a melting point of 2852 degrees, a boiling point of 3600 degrees, and a relative density of 3.58 (25 degrees Celsius). Soluble in acid and ammonium salt solution, insoluble in alcohol. The solubility in water is 0.00062 g/100 mL (0 degree C).
0.0086 g/100 mL (30 degree C). Exposed to the air, it is easy to absorb water and carbon dioxide and gradually become basic magnesium carbonate. Light products are quicker than heavy products. Under certain conditions, magnesium hydroxide is formed by combining with water. The reaction is slightly alkaline. The pH of saturated aqueous solution is 10.3. Soluble in acid and ammonium salt is difficult to dissolve in water, its solution is alkaline. Insoluble in ethanol. There is strong refraction in the visible and near ultraviolet range. Magnesite (MgCO3), dolomite (MgCO3. CaCO3) and sea water are the main raw materials for the production of Magnesium Oxide. Magnesium Oxide is decomposed by thermal decomposition of magnesite or dolomite. Magnesium hydroxide was precipitated from seawater by slaked lime, and Magnesium Oxide was obtained by burning magnesium hydroxide. Magnesium hydroxide or basic magnesium carbonate can be precipitated by adding sodium hydroxide or sodium carbonate, and then burned to produce magnesium oxide. China mainly uses magnesite, dolomite, brine or bittern as raw materials.