Preparation of monodisperse titania by titanium alkoxide hydrolysis
A process for the production of monodisperse titania particles is described comprising the steps of: (a) dissolving titanium tetraalkoxide in an alcoholic medium to form a solution of the alkoxide in the alcoholic medium; (b) providing a hydrolysis solution comprising alcohol and water in amounts sufficient to hydrolyze the alkoxide in the solution; (c) adding the hydrolysis solution to the solution of the alkoxide to hydrolyze the alkoxide at hydrolysis conditions to form a dispersion of monodisperse titania particles, the hydrolysis being conducted in the presence of a component selected from the group consisting of (1) monoalkyl amines, (2) dialkyl amines, (3) trialkyl amines in combination with hydroxypropylcellulose and (4) mixtures thereof, the alkyl substituent having from 1 to 7 carbon atoms; and (d) separating and recovering the monodisperse titania particles from the dispersion.
- Assignee:
- Allied-Signal Inc., Morristown, NJ
- Patent Number(s):
- US 4732750
- OSTI ID:
- 5000548
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
ALCOHOLS
ALKOXIDES
AMINES
AQUEOUS SOLUTIONS
CARBOHYDRATES
CELLULOSE
CHALCOGENIDES
CHEMICAL PREPARATION
CHEMICAL REACTIONS
DECOMPOSITION
DISPERSIONS
DISSOLUTION
HYDROGEN COMPOUNDS
HYDROLYSIS
HYDROXY COMPOUNDS
LYSIS
MIXTURES
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
POLYSACCHARIDES
PROCESS SOLUTIONS
SACCHARIDES
SEPARATION PROCESSES
SOLUTIONS
SOLVOLYSIS
SYNTHESIS
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
WATER