Patent US3668151A successfully refreshed from Google Patents.
US3668151A
Expired / Lapsed
US
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High strength catalyst pellets
Assignee: Phillips Petroleum Co
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Filing: 1969-05-28
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Granted: 1972-06-06
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Expires: 1989-05-28
Abstract
Abstract A method of preparing a high strength catalyst pellet is disclosed which comprises calcining particulate ZnO admixed with particulate Al2O3. Additionally, a catalytic process using a prepared high strength catalyst is disclosed.
Inventors
- 👤 Darrell W Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:04
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/32; C07C5/327; C07C5/333; C07C5/3332; B; B01; B01J; B01J23/00; B01J23/06
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
53 words
about 0.7-1.1 mols of particulate flame-hydrolyzed Al2O3, said flame-hydrolyzed alumina comprising predominately gamma Al2O3, wherein the average particle diameter is in the range of about 0.01-1 micorn; b pelletizing the admixture; and c calcining the pellets at a temperature in the range of 600* to 1,500* C. for from 0.1 to 30 hours.
Claim 2
Dependent Claim
42 words
The method of claim 1 wherein the particle size of said ZnO is in the range of about 40-900 microns average particle diameter and the particle size of said flame-hydrolyzed Al2O3 is in the range from about 0.025-0.75 micron average particle diameter.
Claim 3
Dependent Claim
89 words
about 0.50 mol of particulate flame-hydrolyzed Al2O3, wherein said particle size is about 0.03 micron average particle diameter; b. drying said admixture; c. pelletizing said dried admixture into pellets; d. calcining said pellets at about 1,000* C. for about 16 hours; e. impregnating the pellets with sufficient aqueous solution to result in the impregnated pellets containing, based on the weight of the impregnated pellets, about 0.25 weiGht per cent platinum, about 0.25 weight per cent lithium, and about 0.15 weight per cent tin; and f. drying said impregnated pellets.
Claim 4
Dependent Claim
36 words
The method of claim 2 wherein said pelletized admixture is calcined at a temperature in the range of about 800*-1,200* C. for from 1-30 hours; and further comprising impregnating said calcined admixture with a metal catalyst.
Claim 5
Dependent Claim
19 words
The method of claim 3 further comprising the steps of: a. admixing in deionized water in the ratio of:
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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) | 1975-06-06 | 1975-12-06 | 1976-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-06 | 1979-12-06 | 1980-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-06 | 1983-12-06 | 1984-06-06 | $7700.00 | Window Closed / Lapsed |