Method for preparing beads containing a crosslinked mineral matrix
AssigneeCentre National De La Recherche Scientifique
InventorsEric Prouzet, Miriam Tokumoto, Aurore Krivaya
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Abstract
The invention relates to a process for the preparation of beads comprising a crosslinked inorganic matrix and to the beads obtained. The process consists in preparing gelled beads by pouring a suspension comprising a precursor of the inorganic matrix and an alginate dropwise into a solution of a polyvalent cation salt, the pH of which is less than 3, and in crosslinking the precursor of the inorganic matrix by a sol-gel process. The process is of particular use for the preparation of crosslinked silica or alumina beads having a size of the order of a millimeter.
Claims27
A process for the preparation of beads having a crosslinked inorganic matrix with a size controlled in the millimeter range, which comprises preparing gelled beads by pouring a suspension comprising a precursor of the inorganic matrix and an alginate dropwise into a solution of a polyvalent cation salt, the pH of which is less than 3, and in crosslinking the precursor of the inorganic matrix by a sol-gel process.
Dependencies are inferred from the claim text.