US3006864A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing an attrition resistant catalyst or catalyst support
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1955-08-18
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Granted: 1961-10-31
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Expires: 1975-08-18
Abstract
No abstract record available.
Inventors
- 👤 Fred J Buchmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:10
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/02; B01J21/04; B01J37/00; B01J37/0009; B01J37/0027; B01J37/0045
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
A PROCESS FOR PREPARING AN ATTRITION RESISTANT CATALYST OF THE ALUMINA BASE TYPE WHICH COMPRISES PREPARING AN AQUEOUS ACIDIC DISPERSION OF AN ALUMINUM COMPOUND IN THE FORM OF A HYDROSOL WHICH IS READILY CONVERTIBLE TO ALUMINA ON DEHYDRATION, SPRAY DRYING SAID SOLUTION TO PRODUCE DRY HIGHLY ATTRITION-RESISTANT PARTICLES LARGER THAN ABOUT 15 TO 25 MICRONS, MIXED WITH LESS ATTRITION-RESISTANT PARTICLES, SUBJECTING ALL OF SAID PARTICLES TO AN ATTRITION ACTION TO REDUCE THE LESS ATTRITION-RESISTANT PARTICLES TO FINES SMALL THAN ABOUT 20 MICRONS, ELUTRIATING THE FINES IN WATER TO FORM A SECOND AQUEOUS DISPERSION IN THE FORM OF A HYDROSOL, REMOVING COARSER PARTICLES, REDISPERSING SAID FINES, AND REPEATING THE SPRAY-DRYING, ATTRITION, ELUTRIPARTICLES ARE SUBSTANTIALLY ELIMINATED.
Claim 2
Dependent Claim
114 words
A PROCESS FOR PREPARING AN ATTRITION RESISTANT CATALYST OF THE ALUMINA BASE TYPE WHICH COMPRISES PREPARING AN AQUEOUS ACIDIC DISPERSION OF AN ALUMINUM COMPOUND IN THE FORM OF A HYDROSOL WHICH IS READILY CONVERTIBLE TO ALUMINA ON DEHYDRATION, SPRAY DRYING SAID SOLUTION TO PRODUCE DRY HIGHLY ATTRITION-RESISTANT PARTICLES LARGER THAN ABOUT 15 TO 25 MICRONS, MIXED WITH LESS ATTRITION-RESISTANT PARTICLES, SUBJECTING ALL OF SAID PARTICLES TO AN ATTRITION ACTION TO REDUCE THE LESS ATTRITION-RESISTANT PARTICLES TO FINES SMALL THAN ABOUT 20 MICRONS, ELUTRIATING THE FINES IN WATER TO FORM A SECOND AQUEOUS DISPERSION IN THE FORM OF A HYDROSOL, REMOVING COARSER PARTICLES, REDISPERSING SAID FINES, AND REPEATING THE SPRAY-DRYING, ATTRITION, ELUTRIPARTICLES ARE SUBSTANTIALLY ELIMINATED.
References Cited (Backward Citations)
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US2492167A
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US2487065A
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US2636865A
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US2644799A
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US2555282A
Cited
US2762783A
Cited
US2930764A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-10-30 | 1965-05-01 | 1965-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-30 | 1969-05-01 | 1969-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-30 | 1973-05-01 | 1973-10-31 | $7700.00 | Window Closed / Lapsed |