US4238370A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxidation catalyst and method for its manufacture
Assignee: Tioxide Group Ltd
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Filing: 1979-09-14
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Granted: 1980-12-09
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Expires: 1999-09-14
Abstract
Abstract A method for the manufacture of a total oxidation catalyst in which titanium dioxide is treated with vanadium pentoxide and then washed until the wash liquid is substantially free of vanadium pentoxide. This method produces a catalyst which will totally oxidize an oxidizable organic compound to carbon dioxide.
Inventors
- 👤 Peter Konig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:08
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/16; B01J23/20; B01J23/22; B01D; B01D53/00; B01D53/34; B01D53/74; B01D53/86; B01D53/864
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
66 words
A method for the manufacture of a total oxidation catalyst which comprises selecting a catalyst substrate comprising titanium dioxide, treating the substrate with a source of vanadium pentoxide, if necessary heating the treated substrate, washing the treated substrate with a wash liquid until the wash liquid is substantially free of vanadium pentoxide drying the washed substrate and recovering the dried washed total oxidation catalyst thereby obtained.
Claim 2
Independent Claim
66 words
A method for the manufacture of a total oxidation catalyst which comprises selecting a catalyst substrate comprising titanium dioxide, treating the substrate with a source of vanadium pentoxide, if necessary heating the treated substrate, washing the treated substrate with a wash liquid until the wash liquid is substantially free of vanadium pentoxide drying the washed substrate and recovering the dried washed total oxidation catalyst thereby obtained.
Claim 3
Dependent Claim
22 words
A method according to claim 1 in which the catalyst substrate has a particle size within the range 50 to 600 microns.
Claim 4
Dependent Claim
25 words
A method according to claim 1 in which the catalyst substrate has a surface area within the range 0.5 to 500 square meters per gram.
Claim 5
Dependent Claim
19 words
A method according to claim 1 in which the source of vanadium pentoxide is a soluble salt of vanadium.
Claim 6
Dependent Claim
19 words
A method according to claim 1 in which the source of vanadium pentoxide is an organic compound of vanadium.
Claim 7
Dependent Claim
17 words
A method according to claim 1 in which the source of vanadium pentoxide is vanadium pentoxide itself.
Claim 8
Dependent Claim
25 words
A method according to claim 1 in which the catalyst substrate is treated with a solution of the source of vanadium in a suitable solvent.
Claim 9
Dependent Claim
21 words
A method according to claim 1 in which the catalyst substrate is treated with the source of vanadium in vapour form.
Claim 10
Dependent Claim
17 words
A method according to claim 6 in which the catalyst substrate is treated with molten vanadium pentoxide.
Claim 11
Dependent Claim
41 words
A method according to claim 1 in which the catalyst substrate is treated with an amount of the source of vanadium equivalent to 0.1% to 99% by weight expressed as V 2 O 5 on the weight of TiO 2 .
Claim 12
Dependent Claim
30 words
A method according to claim 10 in which the amount is from 0.5% to 20% by weight expressed as V 2 O 5 on the weight of TiO 2 .
Claim 13
Dependent Claim
32 words
A method according to claim 1 in which the catalyst substrate after treatment with the source of vanadium pentoxide is heated at a temperature within the range 350° C. to 600° C.
Claim 14
Dependent Claim
28 words
A method according to claim 1 in which the wash liquid is selected from the group consisting of water, aqueous alcohols, aqueous inorganic acids and aqueous inorganic alkalis.
Claim 15
Dependent Claim
26 words
A method according to claim 13 in which the catalyst contains 0.7% by weight V 2 O 5 on the weight of TiO 2 after washing.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-12-09 | 1984-06-09 | 1984-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-09 | 1988-06-09 | 1988-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-09 | 1992-06-09 | 1992-12-09 | $7700.00 | Window Closed / Lapsed |