A method for enhancing {HEAD ~ the catalytic activity} of a porous inorganic crystalline composition comprising 98 mole percent or more SiO2 and 2 mole percent or less oxides of at least one initial lattice metal selected from those of Groups IIIB, IVB, VB, {TAIL ~ VIB}, VIIB, VIII, IIIA, IVA and VA of the Periodic Table of the Elements and having an anhydrous anionic framework molar composition expressed by the formula 
A method for enhancing { HEAD ~ the catalytic activity } of a porous inorganic crystalline composition comprising 98 mole percent or more SiO2 and 2 mole percent or less oxides of at least one initial lattice metal selected from those of Groups IIIB , IVB , VB , { TAIL ~ VIB } , VIIB , VIII , IIIA , IVA and VA of the Periodic Table of the Elements and having an anhydrous anionic framework molar composition expressed by the formula
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