Patent US3905914A successfully refreshed from Google Patents.
US3905914A
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V-P-Zr catalysts and method of preparation thereof
Assignee: Individual
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Filing: 1973-07-16
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Granted: 1975-09-16
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Expires: 1993-07-16
Abstract
Abstract V-P-Zr catalysts effective for the oxidation of alkanes to dicarboxylic acid anhydrides (e.g., maleic anhydride) are prepared by mixing vanadium pentoxide and a zirconium salt with a hydrogen halide, then adding phosphoric acid.
Inventors
- 👤 Anthony T Jurewicz
- 👤 Lewis Brewster Young
- 👤 Chin-Chiun Chu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:50
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/16; C07C51/21; C07C51/215; B; B01; B01J; B01J23/00; B01J23/002; B01J23/16; B01J23/20; B01J23/22; B01J27/00; B01J27/14; B01J27/16; B01J27/18; B01J27/186; B01J27/195; B01J27/198; B01J37/00; B01J37/22; B01J37/24; B01J2523/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
198 words
A METHOD FOR PREPARING A VANADIUM-PHOSPHORUSZIRCONIUM COMPOSITE, HAVING AN ATOMIC RATIO OF P/V OF BETWEEN ABOUT 0.5 AND ABOUT 2 AND AN ATOMIC RATIO OF ZR/V OF BETWEEN ABOUT 0.0025 AND ABOUT 0.5, WHICH COMPRISES: A. FORMING A MIXTURE OF (I) A VANDIUM COMPOUND SELECTED FROM THE GROUP CONSISTING OF V2O3, VOCI3, VO(NO3)3, NH4VO3 AND VF53, (II) ZIRCONIUM SALT SELECTED FROM THE GROUP CONSISTING OF ZROCL2, ZROCL24H2O, XROCL2'' 8H2O, ZRO(OAC)2, H2O, ZRCL4, ZR(OAC)4, NA2ZRCL6 AND ZROBR2, XH2O, AND (III) AQUEOUS HCL, HBR OR HI, B. HEATING THE RESULTING SOLUTION AT A TEMPERATURE BETWEEN ABOUT 50*C. AND ABOUT 125*C. FOR A SUFFICIENT TIME TO CONVERT THE RESULTING ORANGE SLURRY TO A BLUE SOLUTION, THE QUANTITY OF THE HYDROGEN HALIDE (III) BEING AT LEAST ABOUT 5 MOLES PER GRAM ATOM OF SAID VANADIUM COMPOUND (I) AND THE AMOUNT OF SAID ZIROCONIUM SALT (II) BEING FROM ABOUT 0.0025 TO ABOUT 0.5 GRAM ATOM PER GRAM ATOM OF VANADIUM COMPOUND (I), C. ADDING FROM ABOUT 0.5 TO ABOUT 2 GRAM ATOMS OF PHOSPHORIC ACID OR OF A COMPOUND HYDROLYZABLE TO PHOSPHORIC ACID PER GRAM ATOM OF SAID VANADIUM COMPOUND, TO THE RESULTING SOLUTION TO FORM A GEL, AND D. DRYING THE GEL.
Claim 2
Independent Claim
198 words
A METHOD FOR PREPARING A VANADIUM-PHOSPHORUSZIRCONIUM COMPOSITE, HAVING AN ATOMIC RATIO OF P/V OF BETWEEN ABOUT 0.5 AND ABOUT 2 AND AN ATOMIC RATIO OF ZR/V OF BETWEEN ABOUT 0.0025 AND ABOUT 0.5, WHICH COMPRISES: A. FORMING A MIXTURE OF (I) A VANDIUM COMPOUND SELECTED FROM THE GROUP CONSISTING OF V2O3, VOCI3, VO(NO3)3, NH4VO3 AND VF53, (II) ZIRCONIUM SALT SELECTED FROM THE GROUP CONSISTING OF ZROCL2, ZROCL24H2O, XROCL2'' 8H2O, ZRO(OAC)2, H2O, ZRCL4, ZR(OAC)4, NA2ZRCL6 AND ZROBR2, XH2O, AND (III) AQUEOUS HCL, HBR OR HI, B. HEATING THE RESULTING SOLUTION AT A TEMPERATURE BETWEEN ABOUT 50*C. AND ABOUT 125*C. FOR A SUFFICIENT TIME TO CONVERT THE RESULTING ORANGE SLURRY TO A BLUE SOLUTION, THE QUANTITY OF THE HYDROGEN HALIDE (III) BEING AT LEAST ABOUT 5 MOLES PER GRAM ATOM OF SAID VANADIUM COMPOUND (I) AND THE AMOUNT OF SAID ZIROCONIUM SALT (II) BEING FROM ABOUT 0.0025 TO ABOUT 0.5 GRAM ATOM PER GRAM ATOM OF VANADIUM COMPOUND (I), C. ADDING FROM ABOUT 0.5 TO ABOUT 2 GRAM ATOMS OF PHOSPHORIC ACID OR OF A COMPOUND HYDROLYZABLE TO PHOSPHORIC ACID PER GRAM ATOM OF SAID VANADIUM COMPOUND, TO THE RESULTING SOLUTION TO FORM A GEL, AND D. DRYING THE GEL.
Claim 3
Dependent Claim
12 words
The method of claim 1, wherein the zirconium salt is zirconyl chloride.
Claim 4
Dependent Claim
12 words
The method of claim 1, wherein the vanadium compound (i) is V2O5.
Claim 5
Dependent Claim
12 words
The method of claim 1, wherein the zirconium salt is zirconyl acetate.
Claim 6
Dependent Claim
18 words
The method of claim 1, wherein the atomic ratio of Zr/V is between about 0.0075 and about 0.2.
Claim 7
Dependent Claim
13 words
The method of claim 1, wherein the hydrogen halide is aqueous hydrogen chloride.
Claim 8
Dependent Claim
15 words
The method of claim 1, wherein the dried gel is ground to finely divided particles.
Claim 9
Dependent Claim
48 words
A vanadium - phosphorus - zirconium composite catalytically active for the oxidation of paraffins and having an atomic ratio of P/V of between about 0.5 and about 2 and an atomic ratio of Zr/V of between about 0.0025 and about 0.5, prepared by the method of Claim 1.
References Cited (Backward Citations)
US3156705A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-15 | 1979-03-17 | 1979-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-15 | 1983-03-17 | 1983-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-15 | 1987-03-17 | 1987-09-16 | $7700.00 | Window Closed / Lapsed |