US4292202A
Expired / Lapsed
US
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Preparation of a vanadium(IV)bis(metaphosphate) hydrocarbon oxidation catalyst containing a group VIB metal promoter
Assignee: Lyondell Chemical Technology LP
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Filing: 1979-12-19
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Granted: 1981-09-29
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Expires: 1999-12-19
Abstract
Abstract A method for the preparation of a chromium, molybdenum or tungsten (Group VIB metal) promoted single phase vanadium(IV)bis(metaphosphate) catalyst useful for the vapor phase oxidation of hydrocarbons and particularly the oxidation of linear C4 unsaturated olefins to prepare maleic anhydride.
Inventors
- 👤 James C. Vartuli
- 👤 Lee R. Zehner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:53
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/16; C07C51/21; C07C51/25; C07C51/252; B; B01; B01J; B01J23/00; B01J23/002; B01J27/00; B01J27/14; B01J27/186; B01J27/195; B01J27/198; B01J27/199; B01J2523/00
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
131 words
A method for the preparation of a promoted single phase crystalline vanadium(IV)bis(metaphosphate) hydrocarbon oxidation catalyst containing a Group VIB metal of the Periodic Table which comprises the steps of: forming a slurry of vanadyl sulfate, a Group VIB metal oxide selected from chromic oxide, molybdenum oxide or tungstic oxide, acetic anhydride and phosphorus pentoxide with the liberation of heat; introducing said slurry into a heating zone and maintaining said zone at a temperature of at least about 325° C. for a period sufficient for the liberation of gases and forming a Group VIB metal-vanadium-phosphorus reaction product; cooling the reaction product and washing with water to essentially remove any soluble residue; drying the water washed product and calcining in air to obtain a Group VIB metal containing single phase crystalline vanadium(IV)bis(metaphosphate) catalyst.
Claim 2
Independent Claim
131 words
A method for the preparation of a promoted single phase crystalline vanadium(IV)bis(metaphosphate) hydrocarbon oxidation catalyst containing a Group VIB metal of the Periodic Table which comprises the steps of: forming a slurry of vanadyl sulfate, a Group VIB metal oxide selected from chromic oxide, molybdenum oxide or tungstic oxide, acetic anhydride and phosphorus pentoxide with the liberation of heat; introducing said slurry into a heating zone and maintaining said zone at a temperature of at least about 325° C. for a period sufficient for the liberation of gases and forming a Group VIB metal-vanadium-phosphorus reaction product; cooling the reaction product and washing with water to essentially remove any soluble residue; drying the water washed product and calcining in air to obtain a Group VIB metal containing single phase crystalline vanadium(IV)bis(metaphosphate) catalyst.
Claim 3
Dependent Claim
38 words
A method according to claim 1 wherein the molar ratio of Group VIB metal to vanadium, employed in the form of Group VIB metal oxide and vanadyl sulfate, is in the range of from about 1:10 to 1:150.
Claim 4
Dependent Claim
11 words
A method according to claim 2 wherein the ratio is 1:90.
Claim 5
Dependent Claim
21 words
A method according to claim 1 wherein the vanadyl sulfate-Group VIB metal oxide-acetic anhydride-phosphorus pentoxide slurry is formed at ambient temperature.
Claim 6
Dependent Claim
23 words
A method according to claim 1 wherein at least stoichiometric quantities of vanadyl sulfate and phosphorus pentoxide are employed to form the slurry.
Claim 7
Dependent Claim
39 words
A method according to claim 1 wherein the amount of acetic anhydride employed is in the range of from about 1 to 4 moles per mole of the combined vanadyl sulfate, Group VIB metal oxide and phosphorus pentoxide employed.
Claim 8
Dependent Claim
20 words
A method according to claim 1 wherein the amount of acetic anhydride employed is from about 2 to 3 moles.
Claim 9
Dependent Claim
21 words
A method according to claim 1 wherein excess liquid is decanted from the slurry prior to introduction into the heating zone.
Claim 10
Dependent Claim
22 words
A method according to claim 1 wherein the slurry is reacted at a temperature of between about 400° C. and 460° C.
Claim 11
Dependent Claim
34 words
A method according to claim 1 wherein the Group VIB metal-vanadium-phosphorus reaction product is dried at a temperature of about 120° C. and calcined in air at a temperature of at least 450° C.
Claim 12
Dependent Claim
28 words
A method according to claim 1 wherein the Group VIB metal promoted single phase crystalline vanadium(IV)bis(metaphosphate) catalyst is prepared in the presence of a suitable carrier or support.
Claim 13
Dependent Claim
27 words
A method according to claim 11 wherein the carrier or support material is added to the Group VIB metal oxide, vanadyl sulfate, acetic anhydride, phosphorus pentoxide slurry.
Claim 14
Dependent Claim
14 words
A method according to claim 12 wherein the carrier or support is an aluminosilicate.
Claim 15
Dependent Claim
35 words
A method according to claim 1 wherein the Group VIB metal containing single phase crystalline vanadium(IV)bis(metaphosphate) catalyst in the unsupported state has an intrinsic surface area of from about 5 to 15 m 2 /g.
Claim 16
Dependent Claim
15 words
A method according to claim 1 wherein the Group VIB metal oxide is chromic oxide.
Claim 17
Dependent Claim
15 words
A method according to claim 1 wherein the Group VIB metal oxide is molybdenum oxide.
Claim 18
Dependent Claim
15 words
A method according to claim 1 wherein the Group VIB metal oxide is tungstic oxide.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-09-28 | 1985-03-30 | 1985-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-28 | 1989-03-30 | 1989-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-28 | 1993-03-30 | 1993-09-29 | $7700.00 | Window Closed / Lapsed |