Patent US2950259A successfully refreshed from Google Patents.
US2950259A
Expired / Lapsed
US
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Platinum catalyst
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1954-04-08
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Granted: 1960-08-23
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Expires: 1974-04-08
Abstract
No abstract record available.
Inventors
- 👤 Jr Charles E Starr
- 👤 Marneil A Segura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:16
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/40; B01J23/42; B01J37/00; B01J37/02; B01J37/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
IN A PROCESS FOR MANUFACTURE OF AN ALUMINA SUPPORTED PLATINUM CATALYST HAVING HIGH HYDROFORMING ACTIVITY IN WHICH THE FOLLOWING STEPS ARE CARRIED OUT: (1) PROVIDING A SUITABLE ADSORPTIVE ALUMINA SUPPORT, (2) IMPREGNATING SAID SUPPORT WITH A SOLUTION OF A PLATINUM COMPOUND, AND (3) ACTIVATING THE IMPREGNATED ALUMINA SUPPORT BY AN ACTIVATING HEAT TREATMENT, THE IMPROVEMENT WHICH COMPRISES HEATING THE IMPREGNATED ALUMINA SUPPORT AT A TEMPERATURE OF AT LEAST ABOUT 900* F. IN SAID HEAT TREATMENT FOR AN APPROPRIATE INTERVAL OF TIME TO FORM A PLATINUM METAL CRYSTALLITE PARTICLES FROM THE IMPREGNATING PLATINUM COMPOUND SOLUTION AND CONTROLLING THE ACTIVATING HEAT TREATMENT TO KEEP THE PARTICLES OF PLATINUM METAL FROM GROWING TO A CRYSTALLIE SIZE EXCEEDING 50 A. AS SHOWN B AN X-RAY TEST DETERMINATION.
Claim 2
Dependent Claim
123 words
IN A PROCESS FOR MANUFACTURE OF AN ALUMINA SUPPORTED PLATINUM CATALYST HAVING HIGH HYDROFORMING ACTIVITY IN WHICH THE FOLLOWING STEPS ARE CARRIED OUT: (1) PROVIDING A SUITABLE ADSORPTIVE ALUMINA SUPPORT, (2) IMPREGNATING SAID SUPPORT WITH A SOLUTION OF A PLATINUM COMPOUND, AND (3) ACTIVATING THE IMPREGNATED ALUMINA SUPPORT BY AN ACTIVATING HEAT TREATMENT, THE IMPROVEMENT WHICH COMPRISES HEATING THE IMPREGNATED ALUMINA SUPPORT AT A TEMPERATURE OF AT LEAST ABOUT 900* F. IN SAID HEAT TREATMENT FOR AN APPROPRIATE INTERVAL OF TIME TO FORM A PLATINUM METAL CRYSTALLITE PARTICLES FROM THE IMPREGNATING PLATINUM COMPOUND SOLUTION AND CONTROLLING THE ACTIVATING HEAT TREATMENT TO KEEP THE PARTICLES OF PLATINUM METAL FROM GROWING TO A CRYSTALLIE SIZE EXCEEDING 50 A. AS SHOWN B AN X-RAY TEST DETERMINATION.
References Cited (Backward Citations)
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US2611749A
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US2611736A
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US2602772A
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US2625504A
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US2623860A
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US2739945A
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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) | 1963-08-23 | 1964-02-22 | 1964-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-23 | 1968-02-22 | 1968-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-23 | 1972-02-22 | 1972-08-23 | $7700.00 | Window Closed / Lapsed |