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AssigneeEniricerche S.p.A.
InventorsGiulio Alberti, Francesco Bartoli, Umberto Constantino, Francesco Di Gregorio, Claudio Valentini
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The invention relates to a zirconium phosphate in particles having sizes comprised within the range of from 1 to 100 .mu.m, a lamellar structure with interlayer distance, in the anhydrous state, comprised within the range of from 7.9 to 8.2 .ANG. and a surface area comprised within the range of from 9 to 20 m.sup.2 /g. The method consists in altering the lamellar structure of a zirconium phosphate with layer structure of alpha type by intercalating into it an organic substance containing a proton-acceptor group and water and by a treatment with ultrasounds, in regenerating the hydrogen form of said zirconium phosphate by an acid and in washing the same with diluted acids and/or water.
Particulate zirconium acid phosphate of modified lamellar structure having a particle size of from 1 to 100 .mu.m, a lamellar structure with interlayer of distance in the anhydrous state of from 7.9 .ANG. to 8.2 .ANG. and a surface area of from 9 to 20 m.sup.2 /g.
Dependencies are inferred from the claim text.