Patent US3207703A successfully refreshed from Google Patents.
US3207703A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Supported vanadium oxide catalysts and process for preparing same
Assignee: Wyeth Holdings LLC
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Filing: 1961-12-05
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Granted: 1965-09-21
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Expires: 1981-12-05
Abstract
No abstract record available.
Inventors
- 👤 William B Innes
- 👤 Duffy Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:27
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/92; B01D53/94; B01D53/944; B01J; B01J23/00; B01J23/16; B01J23/20; B01J23/22; B01J23/70; B01J23/89; B01J23/8933; B01J23/8946; B01J23/898; B01D2255/00; B01D2255/20; B01D2255/207; B01D2255/20723; B01D2255/209; B01D2255/2092; B01D2255/30
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
135 words
A PROCESS FOR PREPARING ALUMINA SUPPORTED VANADIUM OXIDE CATALYST WHICH COMPRISES: (1) ADJUSTING THE TEMPERATURE OF AN AQUEOUS SLURRY OF AMMONIUM METAVANADATE TO A REACTION-TEMPERATURE FROM ABOUT 30*C. TO ABOUT 110*C.; (2) CONTACTING AND THEREBY REACTING SAID SLURRY WITH ACTIVATED ALUMINA PARTICLES WHILE SIMULTANEOUSLY MAINTAINING SUBSTANTIALLY SAID REACTION-TEMPERATURE, SAID CONTACTING SAID REACTING BEING FOR A TIME SUFFICIENT TO FORM A REACTION MIXTURE AND BEING FOR A TIME SUFFICIENT TO LIBERATE AMMONIA, SAID MAINTAINED REACTION-TEMPERATURE BEING FOR A TIME SUFFICIENT (A) TO REMOVE SAID AMMONIA FROM SAID REACTION MIXTURE, (B) TO THEREBY EFFECT A SURFACE REACTION OF VANADATE ION WITH SAID ALUMINA FORMING ALUMINA VANADATE, AND (C) TO THEREBY SUBSTANTIALLY SIMULTANEOUSLY CAUSE PH OF SAID CONTACTING SLURRY TO FALL BELOW ABOUT 8.0; (3) SUBSEQUENTLY DEWATERING SAID ALUMINA VANADATE REACTION COMPOSITE; AND (4) CALCINING SAID DEWATERED COMPOSITE.
Claim 2
Dependent Claim
135 words
A PROCESS FOR PREPARING ALUMINA SUPPORTED VANADIUM OXIDE CATALYST WHICH COMPRISES: (1) ADJUSTING THE TEMPERATURE OF AN AQUEOUS SLURRY OF AMMONIUM METAVANADATE TO A REACTION-TEMPERATURE FROM ABOUT 30*C. TO ABOUT 110*C.; (2) CONTACTING AND THEREBY REACTING SAID SLURRY WITH ACTIVATED ALUMINA PARTICLES WHILE SIMULTANEOUSLY MAINTAINING SUBSTANTIALLY SAID REACTION-TEMPERATURE, SAID CONTACTING SAID REACTING BEING FOR A TIME SUFFICIENT TO FORM A REACTION MIXTURE AND BEING FOR A TIME SUFFICIENT TO LIBERATE AMMONIA, SAID MAINTAINED REACTION-TEMPERATURE BEING FOR A TIME SUFFICIENT (A) TO REMOVE SAID AMMONIA FROM SAID REACTION MIXTURE, (B) TO THEREBY EFFECT A SURFACE REACTION OF VANADATE ION WITH SAID ALUMINA FORMING ALUMINA VANADATE, AND (C) TO THEREBY SUBSTANTIALLY SIMULTANEOUSLY CAUSE PH OF SAID CONTACTING SLURRY TO FALL BELOW ABOUT 8.0; (3) SUBSEQUENTLY DEWATERING SAID ALUMINA VANADATE REACTION COMPOSITE; AND (4) CALCINING SAID DEWATERED COMPOSITE.
Claim 3
Dependent Claim
141 words
A PROCESS FOR PREPARING AN ALUMINA SUPPORTED VANADIUM OXIDE WHICH COMPRISES: (1) ADJUSTING THE TEMPERATURE OF AN AQUEOUS SOLUTION OF AMMONIUM METAVANADATE TO A REACTION-TEMPERATURE OF FROM ABOUT 30*C. TO ABOUT 100*C.; (2) CONTACTING AND THEREBY REACTING SAID SOLUTION WITH ACTIVATED ALUMINA PARTICLES (A) HAVING A SURFACE AREA OF AT LEAST 75 M.2/GM. AND (B) BEING STABILIZED BY A MINOR PROPORTION OF SILICA WHILE SIMULTANEOUSLY MAINTAINING SUBSTANTIALLY SAID REACTION-TEMPERATURE, SAID CONTACTING AND REACTING BEING FOR A TIME (A) SUFFICIENT TO FORM AN ALUMINA VANADATE COMPOSITE AND (B) SUFFICIENT TO CAUSE AMMONIA TO BE EVOLVED; (3) REMOVING SAID AMMONIA SUFFICIENTLY TO SUBSTANTIALLY SIMULTANEOUSLY CAUSE PH OF THE CONTACTING SOLUTION TO FALL BELOW ABOUT 8.0; (4) ISOLATING SAID ALUMINA VANADATE COMPOSITE FROM SAID SOLUTION WHEN THE PH OF SAID CONTACTING-SOLUTION FALLS TO BELOW ABOUT 8.0; AND (5) CALCINING SAID ISOLATED ALUMINA VANADATE COMPOSITE.
Claim 4
Dependent Claim
141 words
A PROCESS FOR PREPARING AN ALUMINA SUPPORTED VANADIUM OXIDE WHICH COMPRISES: (1) ADJUSTING THE TEMPERATURE OF AN AQUEOUS SOLUTION OF AMMONIUM METAVANADATE TO A REACTION-TEMPERATURE OF FROM ABOUT 30*C. TO ABOUT 100*C.; (2) CONTACTING AND THEREBY REACTING SAID SOLUTION WITH ACTIVATED ALUMINA PARTICLES (A) HAVING A SURFACE AREA OF AT LEAST 75 M.2/GM. AND (B) BEING STABILIZED BY A MINOR PROPORTION OF SILICA WHILE SIMULTANEOUSLY MAINTAINING SUBSTANTIALLY SAID REACTION-TEMPERATURE, SAID CONTACTING AND REACTING BEING FOR A TIME (A) SUFFICIENT TO FORM AN ALUMINA VANADATE COMPOSITE AND (B) SUFFICIENT TO CAUSE AMMONIA TO BE EVOLVED; (3) REMOVING SAID AMMONIA SUFFICIENTLY TO SUBSTANTIALLY SIMULTANEOUSLY CAUSE PH OF THE CONTACTING SOLUTION TO FALL BELOW ABOUT 8.0; (4) ISOLATING SAID ALUMINA VANADATE COMPOSITE FROM SAID SOLUTION WHEN THE PH OF SAID CONTACTING-SOLUTION FALLS TO BELOW ABOUT 8.0; AND (5) CALCINING SAID ISOLATED ALUMINA VANADATE COMPOSITE.
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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) | 1968-09-20 | 1969-03-22 | 1969-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-20 | 1973-03-22 | 1973-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-20 | 1977-03-22 | 1977-09-21 | $7700.00 | Window Closed / Lapsed |