초록 ▼

A neutral templating route to mesoporous molecular sieves based on H-bonding and self-assembly between neutral primary amine or diamine surfactants (S.degree.) and neutral inorganic precursors (I.degree.) has been used to prepare hexagonal and lamellar mesoporous silicas with site isolated transitio

A neutral templating route to mesoporous molecular sieves based on H-bonding and self-assembly between neutral primary amine or diamine surfactants (S.degree.) and neutral inorganic precursors (I.degree.) has been used to prepare hexagonal and lamellar mesoporous silicas with site isolated transition metal centers. The templating of neutral metallosilicate precursors (I.degree.) with neutral diamine surfactants (S.degree.-S.degree.) affords thermally stable pillared lamellar metallosilicates exhibiting complementary framework-confined microporosity and textural mesoporosity while at the same time also providing for template recovery by solvent extraction. These new mesoporous metallosilicate molecular sieves exhibit exceptional catalytic activity for peroxide hydroxylation of benzene and oxidation of substituted aromatics with kinetic diameters that are too large (larger than 6 .ANG.) to access the pore structure of the conventional microporous transition metal-substituted molecular sieves such as titano- and vanadosilicates.

대표청구항 ▼

1. A lamellar pillared mesoporous metal silicate composition containing a template, wherein the metal is present in place of some of the silicon in the silicate and capable of undergoing a change of oxidation number in an oxidation or reduction reaction, directly prepared by a neutral self-assembly

1. A lamellar pillared mesoporous metal silicate composition containing a template, wherein the metal is present in place of some of the silicon in the silicate and capable of undergoing a change of oxidation number in an oxidation or reduction reaction, directly prepared by a neutral self-assembly method which comprises reacting a neutral bipolar diamine as the template and neutral inorganic oxide precursors in the presence of a solvent which is a hydrolyzing agent to form a reaction product, aging of the reaction mixture to form the crystalline pillared lamellar metal silicate without removal of the template and the aqueous solution, wherein the molar ratio of neutral template to total inorganic oxide precursor in the composition is between 0.05 and 3 to 1.