METHOD OF PRODUCTION OF THE PSEUDO-BOEHMITE Russian patent published in 2006 - IPC C01F7/30 

FIELD: chemical industry; methods of production of a pseudo-boehmite.

SUBSTANCE: the invention is pertaining to the field of chemical industry, in particular, to the method of production of a pseudo-boehmite. The method of production of the pseudo-boehmite provides for: (a) dissolution of argillite (Al₂О₃ * 3H₂O) in the hydrogen nitrate, producing the acidic solution of aluminum nitrate; (b) decomposition at 300-700°C with free feed of the air of this acid solution onto the pseudo-boehmite and_{NOx; (c) regeneration of the formedNOx into the concentrated hydrogen nitrate and return of the produced hydrogen nitrate in the phase (a);(d) withdrawal of the produced pseudo-boehmite formed at the stage (b)by the methods selected from pulverization on the inner surface of one or several rotary evaporation sources, drying in the fluidized layer and dryings in the conveyor furnace with the steel band. The invention allows to reduce losses of the material.}

EFFECT: the invention ensures reduction of the losses of the material.

3 cl, 1 ex