Patent US3108972A successfully refreshed from Google Patents.
US3108972A
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Removing impurities from catalysts
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1960-01-13
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Granted: 1963-10-29
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Expires: 1980-01-13
Abstract
No abstract record available.
Inventors
- 👤 Edmond R Retailliau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:36
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/90; B01J23/94; Y; Y10; Y10S; Y10S502/00; Y10S502/515; Y10S502/516
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
A METHOD OF REACTIVATING SOLID CATALYSTS SELECTED FROM THE GROUP CONSISTING OF COBALT MOLYBDATE ON ALUMINA AND SILICA-ALUMINA WHICH HAS BEEN CONTAMINATED WITH METALLIC DEPOSITS INCLUDING VANADIUM, NICKEL, AND IRON IN THE TREATMENT OF HYDROCARBONS WHICH COMPRISES TREATING SAID CATALYST WITH A SOLUTION SELECTED FROM THE GROUP CONSISTING OF AN AQUEOUS SOLUTION OF AMMONIUM POLYSULFIDE HAVING A CONCENTRATION OF AMMONIUM POLYSULFIDE OF AT LEAST 10% BY WEIGHT AND AN AQUEOUSL SOLUTION OF AMMONIUM SULFIDE HAVING A CONCENTRATION OF AMMONIUM SULFIDE OF AT LEAST ABOUT 10% BY WEIGHT AT A TEMPERATURE BETWEEN ABOUT 75*F. AND 500*F. AND A PRESSURE BETWEEN ATMOSPHERIC AND ABOUT 400 P.S.I.G. TO CONVERT CONTAMINATING METAL DEPOSITS TO SOLUBLE MATERIALS WITHOUT REMOVING ANY SUBSTANTIAL AMOUNT OF THE ACTIVE CATALYST MATERIAL, REMOVING THE SOLUBILIZED MATERIAL FORMED FROM SAID CONTAMINATING METALLIC DEPOSITS BY WASHING WITH AN AQUEOUS MEDIUM AND RECOVERING SAID REACTIVATED CATALYST.
Claim 2
Independent Claim
143 words
A METHOD OF REACTIVATING SOLID CATALYSTS SELECTED FROM THE GROUP CONSISTING OF COBALT MOLYBDATE ON ALUMINA AND SILICA-ALUMINA WHICH HAS BEEN CONTAMINATED WITH METALLIC DEPOSITS INCLUDING VANADIUM, NICKEL, AND IRON IN THE TREATMENT OF HYDROCARBONS WHICH COMPRISES TREATING SAID CATALYST WITH A SOLUTION SELECTED FROM THE GROUP CONSISTING OF AN AQUEOUS SOLUTION OF AMMONIUM POLYSULFIDE HAVING A CONCENTRATION OF AMMONIUM POLYSULFIDE OF AT LEAST 10% BY WEIGHT AND AN AQUEOUSL SOLUTION OF AMMONIUM SULFIDE HAVING A CONCENTRATION OF AMMONIUM SULFIDE OF AT LEAST ABOUT 10% BY WEIGHT AT A TEMPERATURE BETWEEN ABOUT 75*F. AND 500*F. AND A PRESSURE BETWEEN ATMOSPHERIC AND ABOUT 400 P.S.I.G. TO CONVERT CONTAMINATING METAL DEPOSITS TO SOLUBLE MATERIALS WITHOUT REMOVING ANY SUBSTANTIAL AMOUNT OF THE ACTIVE CATALYST MATERIAL, REMOVING THE SOLUBILIZED MATERIAL FORMED FROM SAID CONTAMINATING METALLIC DEPOSITS BY WASHING WITH AN AQUEOUS MEDIUM AND RECOVERING SAID REACTIVATED CATALYST.
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) | 1966-10-28 | 1967-04-29 | 1967-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-10-28 | 1971-04-29 | 1971-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-10-28 | 1975-04-29 | 1975-10-29 | $7700.00 | Window Closed / Lapsed |