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US 4,228,038 AGranted
Method for the preparation of catalyst of vanadium pentoxide on substrate of titanium dioxide
AssigneeTioxide Group Limited
InventorPeter Konig
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Abstract
A method for the manufacture of a selective oxidation catalyst by heating titanium dioxide in the presence of water prior to treating the titanium dioxide with vanadium oxytrichloride in vapor form and then heating the treated titanium dioxide. This treatment with water and vanadium oxytrichloride is repeated a number of times until the desired selective oxidation catalyst is obtained.
Claims10
A method for the manufacture of a selective oxidation catalyst which comprises the following process stages:
- (1) heating a particulate catalyst substrate comprising titanium dioxide in an atmosphere containing water vapour
- (2) treating the substrate with vanadium oxytrichloride in vapour form
- (3) heating the treated substrate until the evolution of hydrogen chloride has ceased and to complete the conversion of the deposited vanadium compound to vanadium pentoxide
- (4) repeating the process stages 1, 2, and 3 at least a further three times, and
- (5) finally allowing the treated substrate comprising the selective oxidation catalyst to cool.
2 more elements
Dependencies are inferred from the claim text.