Desulfurization magnesium oxide properties and uses
Date:2017-07-18 Author: Click:
MgCl2 (melting) = Mg + Cl2 ↑ (electrolysis)
MgO + C = Mg↑ + CO↑ (high temperature)
Sex 6.2 mg/L (20 ° C), reacts
White or light yellow powder, odorless, tasteless, non-toxic, the product is insoluble in water or ethanol, slightly soluble in ethylene glycol, melting point 2852 ° C, boiling point 3600 ° C, magnesium oxide has high refractory insulation properties. It can be converted into crystals by burning at a temperature above 1000 ° C. If it rises above 1500 ° C, it will form a burnt magnesia (also known as magnesia) or sintered magnesia.
Chemical properties: Desulfurized magnesium oxide Magnesium oxide is a basic oxide with the basic properties of alkaline oxides and belongs to the cementitious material.
Exposure to the air, easy to absorb water and carbon dioxide and gradually become basic magnesium carbonate, lighter products are faster than heavy products, combined with water to form magnesium hydroxide, a slightly alkaline reaction, the pH of the saturated aqueous solution is 10.3. Soluble in acid and ammonium salts are insoluble in water, and the solution is alkaline. Do not dissolve in ethanol.
Slowly react with water to form magnesium hydroxide
Strong refraction in the visible and near-ultraviolet range.
Classification: divided into light magnesium oxide and heavy magnesium oxide. Lightweight and bulky, it is a white amorphous powder. Odorless, tasteless and non-toxic. The density is 3.58 g/cm3. Hard to dissolve in pure water and organic solvents, solubility in water increases due to the presence of carbon dioxide. Soluble in acid, ammonium salt solution. It is converted into crystals by high temperature burning. In the case of carbon dioxide in the air, it forms a double salt of magnesium carbonate. Heavy and compact, white or beige powder. It is easy to combine with water, and it is easy to absorb water and carbon dioxide in the exposed air. It is easy to gel and harden when mixed with magnesium chloride solution.
With the upgrading of industrialization and the demand and development of high-tech functional materials market, R&D has produced a series of high-tech fine magnesium oxide products, mainly used in advanced lubricating oil, advanced tanning base, food grade, medicine, silicon steel grade, advanced Nearly ten varieties of electromagnetic grade, high-purity magnesium oxide