ACTIVE HIGH-PURITY MAGNESIUM OXIDE AND METHOD OF ITS PRODUCTION Russian patent published in 2019 - IPC C01F5/02 C01F5/08 C01F5/14 

FIELD: chemistry.

SUBSTANCE: invention relates to chemical engineering and specifically to active high-purity magnesium oxide and a method for production thereof. Method of producing active high-purity magnesium oxide, including surface-treated, consists in calcining magnesium hydroxide obtained by reacting an aqueous solution of a magnesium salt with an alkaline agent. Preparation of magnesium hydroxide crystals is carried out in a continuous manner in separated and isolated zones in the presence of magnesium hydroxide inoculant crystals and liquid oil products in molar ratio of ions of alkaline agent and magnesium chloride OH^-:Mg⁺⁺ within (1.9÷2.1):1, temperature in all zones of not less than 40 °C and residence time of suspension of crystals of magnesium hydroxide in each isolated zone is not less than 20 minutes.

EFFECT: higher activity and chemical purity of magnesium oxide.

22 cl, 2 tbl, 6 ex