METHOD OF PRODUCING NANOMETRIC MONODISPERSED AND STABLE MAGNESIUM HYDROXIDE AND OBTAINED PRODUCT Russian patent published in 2011 - IPC C01F5/22 B82B1/00 

FIELD: chemistry.

SUBSTANCE: invention relates to chemistry and can be used to produce nanometric monodispersed and stable Mg(OH)₂ and products obtained therefrom. The method involves mixing aqueous solution of a magnesium salt and aqueous solution of an alkali, stabilisation of the mixed product by adding a diluent, maturation of the stabilised product, cleaning the matured product to obtain magnesium hydroxide particles. The aqueous solution of the magnesium salt contains a surfactant which is ethoxylate, and an organic acid. The aqueous alkaline solution contains an alkali selected from a group comprising sodium hydroxide, potassium hydroxide and ammonium solutions, and a dispersing agent selected from polyacrylate acid type substances or salts thereof. The diluent which is used to stabilise the product of the mixture contains water and the same dispersing agent as the one used in the alkaline solution. The diluent is added with constant agitation during the stabilisation process. During the maturation step, the stabilised mixture of the product undergoes mechanical and chemical treatment using ultrasound which preferably lies between 20 and 45 kHz.

EFFECT: invention enables to obtain magnesium hydroxide nanoparticles in high concentrations and products therefrom.

15 cl, 5 dwg