NANOSTRUCTURED TITANIA CATALYST WITH STABILIZED ACIDITY AND PROCESS THEREOF
First Claim
1. A nanostructured titania catalyst with stabilized acidity comprising a crystalline amorphous phase, hydrogen titanate and a titanate/anatase combination.
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Abstract
The present invention is directed to a process for obtaining a nanostructured titania catalyst with stabilized acidity through the sol-gel method and hydrotreatment and thermal activation; constituted basically by titanium oxide, specially characterized of being as nanostructures in its evolution nanocrystals-nanotubes-nanocrystals, that gives special physicochemical properties such as high specific area, purity and phases stability, acidity stability and different types of active acid sites, such as a capacity to disperse and stabilize metallic particles with high activity mainly in catalytic processes.
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25 Claims
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1. A nanostructured titania catalyst with stabilized acidity comprising a crystalline amorphous phase, hydrogen titanate and a titanate/anatase combination.
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2. A nanostructured titania catalyst with stabilized acidity and process thereof, obtained through the sol-gel method and hydrotreatment and thermal activation characterized in that is constituted by the crystalline amorphous phases;
- hydrogen titanate, titanates/anatase combination in the following ratio and phases transitions;
- View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
- hydrogen titanate, titanates/anatase combination in the following ratio and phases transitions;
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22. A process for producing a nanocrystalline titania catalyst comprising the steps of:
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producing a nanocrystalline titanium dioxide by a sol-gel method; hydrotreating the nanocrystalline titanium dioxide with an alkaline solution, heating and washing with an acid to obtain titanium dioxide nanotubes; and
calcining the titanium dioxide nanotubes at a temperature of 100 to 600°
C. to obtain the nanocrystalline titania. - View Dependent Claims (23, 24, 25)
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Specification