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Crystalline mesoporous zirconia catalysts having stable tetragonal pore wall structure

United States Patent

5,786,294
July 28, 1998
View the Complete Patent at the US Patent & Trademark Office
Methods for the preparation of new sulfated mesoporous zirconia materials/catalysts with crystalline pore walls of predominantly tetragonal crystal structure, characterized by nitrogen physisorption measurement, X-ray diffraction, transmission electron microscopy and catalytic tests using n-butane isomerization to iso-butane and alkylation of 1-naphthol with 4-tert-butylstyrene as probe reactions. Sulfate deposition is preferred for the transformation of a mesoporous precursor with amorphous pore walls into a material with crystalline pore walls maintaining the mesoporous characteristics.
Sachtler; Wolfgang M. H. (Evanston, IL), Huang; Yin-Yan (Evanston, IL)
Northwestern University (
08/ 644,359
May 10, 1996
CONTRACTUAL ORIGIN OF THE INVENTION The United States Government has rights in this invention pursuant to Grant No. DEFG0287ER13654, from the U.S. Department of Energy to Northwestern University.