SUSPENSION CONTENANT DES NANOPARTICULES D'ACIDE SILICIQUE COLLOIDALES STABILISEES A L'HYDRONIUM, FORMULATION OBTENUE A PARTIR DE LADITE SUSPENSION DILUEE, POUDRE OBTENUE A PARTIR DE LADITE SUSPENSION DESHYDRATEE, COMPOSITIONS OBTENUES A PARTIR DE LADITE POUDRE, PREPARATION ET UTILISATION
The present invention relates to hydronium stabilized silicic acidnanoparticles, to the formulation obtained fromthe said diluted suspension, to the powder obtained from the said dehydratedsuspension and to the preparation or dosage formob-tained from the said suspension, formulation or powder, to theirpreparation and their use in all kinds of applications in thedo-mains of food, medicine, pharmaceutics, cosmetics. The present inventionprovides a stable suspension of colloidal silicic acidnanoparticles having a pH lower than 0.9, a molar silicon concentrationbetween 0.035 and 0.65, a free water concentration of atleast 30% (w/v) and a ratio between hydronium ion and Si molar concentrationshigher than 2 and preferably inferior to 4. Thepresent invention further provides a method for preparing a stable suspensionof colloidal silicic acid nanoparticles, whichcom-prises the steps of providing an aqueous inorganic or organic siliconsolution and quick mixing said aqueous inorganic or organicsilicon solution with water containing a strong acidic compound at atemperature inferior at 300°C, preferably comprised between1 and 25°C, to form a suspension of colloidal silicic acidnanoparticles having a pH lower than 0.9, stabilized by hydronium ions,the ratio between hydronium ions and Si molar concentrations being higher than2 and preferably inferior to 4, for a molar siliconconcentration between 0.035 and 0.65 and a free water concentration of atleast 30% (w/v).
