Silica-titanium silicalite, silica-beta zeolite, etc. composite materials - comprises microspheres containing specific amount of zeolitic compounds, for use as catalysts in oxidation reactions of organic compounds with hydrogen peroxide

Silica-titanium silicalite, silica-beta zeolite, etc. composite materials - comprises microspheres containing specific amount of zeolitic compounds, for use as catalysts in oxidation reactions of organic compounds with hydrogen peroxide

Silica/titanium silicate, silica/beta -zeolite and silica/beta -zeolite/titanium silicate composite materials comprises microspheres of diameter 20-150 mu m and contain 70 wt.% zeolitic materials. The composites have a surface area of 300-800 m2/g. Also claimed is the preparation of the above materi...

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Bibliographische Detailangaben
Hauptverfasser: UNGARELLI RAFFAELE, BALDUCCI LUIGI
Format: Patent
Sprache:eng ; ita
Schlagworte:
CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY
CHEMISTRY
COMPOUNDS THEREOF
INORGANIC CHEMISTRY
METALLURGY
NON-METALLIC ELEMENTS
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
THEIR RELEVANT APPARATUS
TRANSPORTING
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Beschreibung
Zusammenfassung:Silica/titanium silicate, silica/beta -zeolite and silica/beta -zeolite/titanium silicate composite materials comprises microspheres of diameter 20-150 mu m and contain 70 wt.% zeolitic materials. The composites have a surface area of 300-800 m2/g. Also claimed is the preparation of the above materials, comprising: (i) the preparation of a silica sol by the acid hydrolysis of silicon alkoxides; (ii) mixing the sol with an aqueous hydroalcoholic suspension of titanium silicalite or beta -zeolite particles of 1 mu m diameter; and (iii) emulsifying and gelling in organic media of the hybrid sol.