SILISIUMOKSID/TITANOKSID-KOGEL FOR ANVENDELSE I EN KATALYSATOR SAMT FREMGANGSMAATE TIL POLYMERISERING VED ANVENDELSEDERAV

SILISIUMOKSID/TITANOKSID-KOGEL FOR ANVENDELSE I EN KATALYSATOR SAMT FREMGANGSMAATE TIL POLYMERISERING VED ANVENDELSEDERAV

A silica-titania cogel is produced in a two-step process wherein in the first step an alkyl polysilicate and/or a tetraalkyl silicate is partially hydrolyzed in an alkaline organic solvent using insufficient water to complete hydrolysis and thereafter a tetraalkyl titanate and an excess of water are...

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Bibliographische Detailangaben
1. Verfasser: MCDANIEL, MAX PAUL
Format: Patent
Sprache:nor
Schlagworte:
CHEMISTRY
COMPOSITIONS BASED THEREON
COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
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Beschreibung
Zusammenfassung:A silica-titania cogel is produced in a two-step process wherein in the first step an alkyl polysilicate and/or a tetraalkyl silicate is partially hydrolyzed in an alkaline organic solvent using insufficient water to complete hydrolysis and thereafter a tetraalkyl titanate and an excess of water are added to complete the hydrolysis. The resulting product is as good or better than silica-titania cogels made by expensive prior art techniques and offers the advantage of not requiring a washing step to remove alkali metal ions and thus also does not require an azeotrope drying step to remove water.