Manufacture MgCO and MgO Through Magnesium Sulfate Heptahydrate

1. In the presence of catalyst, the magnesium sulfate prepares magnesium oxide by the carbonaceous reducing agent.

2. The hydrochloric acid circulation method combines the production between barium sulfate and magnesium oxide.

   This kind of hydrochloric acid circulation method belongs to the method of preparing chemical substances. It mainly uses magnesium sulfate and barite deposit as raw material. Compared with industrial barium sulfate, it has a lower cost. Therefore, it is used for deal with the medicinal barium sulfate, and overcomes barium sulfate’s shortages, such as the high sulphur content, low whiteness and can not be used in medical. At the same time, it solves the problems of gross barium carbonate residue pollution.

3. Prepare active magnesium oxide utilizing magnesium sulfate waste water

   Under the circumstance of mechanical agitation, adding the lime milk into the magnesium sulfate waste water. Its concentration must be from 15% to 25%, and PH value must be from 12 to 13. After stirring for some time, the magnesium sulfate and magnesium hydroxide are mixed into precipitate. And then, moving the precipitate into micropressure reaction still, the pressure should be controlled from 2kg to 6kg. Carbonizing it by carbon dioxide, and we can obtain  magnesium bicarbonate solution after filtration. Under heating and stired, pyrolyzing the magnesium bicarbonate solution can obtain precipitate of basic magnesium carbonate. The pyrolytic time is from one to two hours. Finally, it can obtain active magnesium oxide after filtration, washing and drying, burning it for four to six hours at the temperature of 950℃ to 1000℃. This method has a lot of advantages: simple craft, high production efficiency, high magnesium yield coefficient, low cost, environmentally friendly, etc. Therefore, the magnesium sulfate waste water is utilized reasonably. At the same time, it provides a new method to deal with the magnesium sulfate.

4. Manufacture MgCO and MgO through magnesium sulfate heptahydrate

   For the exploitation of ascharite ore, producing the boracic acid while producing a large number of magnesium sulfate heptah. It is the by-product. Therefore, it is necessary to develop and use the magnesium salt. Generating basic magnesium carbonate through the reaction between epsom salt and ammonium bicarbonate. And then, calcining and producing light magnesium oxide. The light magnesium oxide has widely applications. For example, the light magnesium oxide used for rubber industry, metallurgical industry, fireproofing insulation materials, ceramics industry and other industries. Therefore, it has a certain value to produce light magnesium oxide through magnesium sulfate.