Process for the preparation of solid particles by precipitation reaction in a liquid solvent, particulate products obtained and their use

摘要

Process for the preparation in a liquid solvent of a compound chosen from metal salts, oxides or hydroxides, in the form of solid particles, by a precipitation reaction starting with two reactants soluble in the said solvent. For the purpose of obtaining particles of controlled dimensions, one of the reactants is reacted in the form of solid particles which have dimensions close to those which it is desired to obtain for the said compound, with an excess of the second reactant in the form of a concentrated solution and, if desired, operating measures are taken which are intended to promote the progress of the reaction towards the interior of the particles.