Silica particles and method for their preparation

Silica particles, especially spherical silica particles, having a very narrow pore diameter distribution which can be set independently from the pore volume can be prepared according to the sol-gel technique by partially pre-drying the hydrogel particles obtained and subjecting the partially pre-dri...

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Bibliographische Detailangaben
Hauptverfasser:	SPEK, THEO GERARD, VAN BEEM, MARTINUS JAN LODEWIJK
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY COMPOUNDS THEREOF CRACKING HYDROCARBON OILS FUELS INORGANIC CHEMISTRY LUBRICANTS METALLURGY MINERAL WAXES NON-METALLIC ELEMENTS ORGANIC CHEMISTRY PEAT PERFORMING OPERATIONS PETROLEUM, GAS OR COKE INDUSTRIES PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVEHYDROGENATION, OLIGOMERISATION, POLYMERISATION RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, ORGASES REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS REFORMING OF NAPHTHA SEPARATION TECHNICAL GASES CONTAINING CARBON MONOXIDE THEIR RELEVANT APPARATUS TRANSPORTING
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Beschreibung
Zusammenfassung:	Silica particles, especially spherical silica particles, having a very narrow pore diameter distribution which can be set independently from the pore volume can be prepared according to the sol-gel technique by partially pre-drying the hydrogel particles obtained and subjecting the partially pre-dried particles thus obtained to a hydrothermal treatment followed by washing, drying and optionally calcining. The novel silica particles thus obtained have an unusually regular structure and can be suitably used as catalysts or catalyst carriers, e.g. in hydrodemetallization processes and in olefin hydration processes.