US3044965A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of bismuth catalysts
Assignee: Standard Oil Co
•
Filing: 1959-04-16
•
Granted: 1962-07-17
•
Expires: 1979-04-16
Abstract
No abstract record available.
Inventors
- 👤 James L Callahan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:41
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/16; B01J23/24; B01J23/31; B01J23/18; B01J27/00; B01J27/14; B01J27/186; B01J27/188; B01J27/19; B01J27/192
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
A PROCESS FOR THE MANUFACTURE OF A CATALYST SUITABLE FOR USE IN A FLUIDIZED BED REACTOR SELECTED FROM THE GROUP CONSISTING OF BISMUTH SILICO-MOLYBDATE AND BISMUTH SILICOPHOSPHO-MOLYBDATE, COMPRISING THE STEPS OF (1) PREPARING A SLURRY COMPRISING BISMUTH NITRATE; A MOLYBDENUM COMPOUND SELECTED FROM THE GROUP CONSISTING OF A HEPTAMOLYBDATE, A DIMOLYBDATE AND PHOSPHOMOLYBDIC ACID; SILICA; AND AT LEAST 1% BY WEIGHT OF AMMONIUM NITRATE, (2) SUBJECTING SAID SLURRY TO A SPRAY DRYING OPERATION WHEREBY SPHERICALLY SHAPED PARTICLES OF RELATIVELY UNIFORM SMALL SIZE ARE PRODUCED, AND FINALLY (3) COLLECTING SAID PARTICLES FROM SAID SPRAY DRYING OPERATION AND SUBJECTING THEM TO AN ELEVATED TEMPERATURE WHEREBY THE CALCINATION OF THE CATALYST IS EFFECTED.
Claim 2
Dependent Claim
110 words
A PROCESS FOR THE MANUFACTURE OF A CATALYST SUITABLE FOR USE IN A FLUIDIZED BED REACTOR SELECTED FROM THE GROUP CONSISTING OF BISMUTH SILICO-MOLYBDATE AND BISMUTH SILICOPHOSPHO-MOLYBDATE, COMPRISING THE STEPS OF (1) PREPARING A SLURRY COMPRISING BISMUTH NITRATE; A MOLYBDENUM COMPOUND SELECTED FROM THE GROUP CONSISTING OF A HEPTAMOLYBDATE, A DIMOLYBDATE AND PHOSPHOMOLYBDIC ACID; SILICA; AND AT LEAST 1% BY WEIGHT OF AMMONIUM NITRATE, (2) SUBJECTING SAID SLURRY TO A SPRAY DRYING OPERATION WHEREBY SPHERICALLY SHAPED PARTICLES OF RELATIVELY UNIFORM SMALL SIZE ARE PRODUCED, AND FINALLY (3) COLLECTING SAID PARTICLES FROM SAID SPRAY DRYING OPERATION AND SUBJECTING THEM TO AN ELEVATED TEMPERATURE WHEREBY THE CALCINATION OF THE CATALYST IS EFFECTED.
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) | 1965-07-16 | 1966-01-15 | 1966-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-16 | 1970-01-15 | 1970-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-16 | 1974-01-15 | 1974-07-17 | $7700.00 | Window Closed / Lapsed |