Tolsa, S.a.

Jose Francisco Fernández Lozano

Antonio Alvarez Berenguer

Antonio Esteban Cubillo

Miguel Angel Rodriguez Barbero

Elena Palacios Zambrano

Maria Pilar Leret Molto

Antonio Heliodoro De Aza Moya

The present invention relates to a method for preparing hierarchically ordered structures of inorganic phosphate particles, homogeneously deposited on the surface of a phyllosilicate, which is characterized in that it comprises the following steps: a) obtaining an acid solution of precursor compounds of an inorganic phosphate; b) preparing a dispersion of particles of a phyllosilicate in aqueous medium and acidifying the phyllosilicate dispersion by adding at least one acid, thereby obtaining an acid dispersion; c) mixing the acid solution obtained in step a) with the dispersion obtained in step b); and d), with stirring, adding a base to the mixture obtained in step c) until the required pH value for precipitating the corresponding inorganic phosphate on the phyllosilicate particles has been achieved, resulting in a hierarchically ordered structure of homogeneously distributed submicrometric or nanometric inorganic phosphate particles supported on the phyllosilicate surface.

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Madrid, Spain

Jose Francisco Fernández Lozano