TITANIA PARTICLES AND A PROCESS FOR THEIR PRODUCTION

TITANIA PARTICLES AND A PROCESS FOR THEIR PRODUCTION

TITANIA PARTICLES AND A PROCESS FOR THEIR PRODUCTION The invention provides a process for the production of titania particles with a desired morphology. The process comprises providing a titania sol and then drying the sol to provide dried titania particles. The process is characterised in that the...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: ROBB, John, LOWRY, Karl, WATERS, Darren J, EDWARDS, John Lalande
Format: Patent
Sprache:eng
Schlagworte:
CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY
CHEMISTRY
COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F
INORGANIC CHEMISTRY
METALLURGY
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
THEIR RELEVANT APPARATUS
TRANSPORTING
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Beschreibung
Zusammenfassung:TITANIA PARTICLES AND A PROCESS FOR THEIR PRODUCTION The invention provides a process for the production of titania particles with a desired morphology. The process comprises providing a titania sol and then drying the sol to provide dried titania particles. The process is characterised in that the morphology of the dried titania particles is controlled by applying one or more of the following criteria:(a) the titania sol is produced from a TiO 2 containing slurry obtained using a precipitation step in a sulphate process, wherein the size of micelles formed during the precipitation is controlled; (b) the titania sol is produced from a TiO 2 containing slurry and the pH of the slurry is controlled in order to affect the extent to which the titania sol is flocculated; (c) the titania sol is produced from a TiO 2 containing slurry and the iso-electric point of the titania is adjusted in order to affect the extent to which the titania sol is flocculated; (d) the titania sol is dried by application of heat and the temperature used during the drying step is controlled.