Metallosilicate material modified layered and process for its production.

A process for producing a material modified layered metallosilicate comprising the following steps in the first to fifth: First Step: a step of heating a mixture containing a template compound, a boron compound, a compound containing silicon and water to thereby obtain a precursor (A); Second step: a step of acid-treating the precursor (A) obtained in the first step, to thereby obtain a precursor (B); third step: a step of heating the precursor (B) obtained in the second step in the presence of a swelling agent so as to swell the precursor (B), to thereby obtain a precursor (C); Fourth step: a step of modifying the manner of the stacking between layers in the precursor (C) obtained in the third step, to thereby obtain a precursor (D); and fifth step: a step of calcining the precursor (D) obtained in the fourth step, to thereby obtain a material modified layered metallosilicate.