US2963443A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reactivation of molybdenum containing catalysts
Assignee: Universal Oil Products Co
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Filing: 1958-05-29
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Granted: 1960-12-06
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Expires: 1978-05-29
Abstract
No abstract record available.
Inventors
- 👤 William G Nixon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:19
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/90; B01J23/94
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
97 words
A METHOD FOR REACTIVATING A EACTIVATED MOLYBDENUM-CONTAINING REFRACTORY INORGANIC OXIDE CATALYST WHICH COMPRISES SUBJECTING SAID DEACTIVATED CATALYST AT A TEMPERATURE OF FROM ABOUT 25*C. TO ABOUT 1000*C., TO THE ACTION OF AN OXIDE OF NITROGEN SELECTED FROM THE GROUP CONSISTING OF N203, N205 AND MIXTURES THEREOF, WITHOUT REMOVING THE MOLYBDENUM COMPONENT FROM THE SAID CATALYST, STRIPPING SAID OXIDE OF NITROGEN FROM SAID CATALIST WITH A GAS NOT HAVING A REDUCING ACTION ON SAID OXIDE OF NITROGEN, AND THEREAFTER SUBJECTING SAID CATALYST TO A REDUCING TREATMENT WITH HYDROGEN AT A TEMPERATURE OF FROM ABOUT 25*C. TO ABOUT 1000*C.
Claim 2
Independent Claim
97 words
A METHOD FOR REACTIVATING A EACTIVATED MOLYBDENUM-CONTAINING REFRACTORY INORGANIC OXIDE CATALYST WHICH COMPRISES SUBJECTING SAID DEACTIVATED CATALYST AT A TEMPERATURE OF FROM ABOUT 25*C. TO ABOUT 1000*C., TO THE ACTION OF AN OXIDE OF NITROGEN SELECTED FROM THE GROUP CONSISTING OF N203, N205 AND MIXTURES THEREOF, WITHOUT REMOVING THE MOLYBDENUM COMPONENT FROM THE SAID CATALYST, STRIPPING SAID OXIDE OF NITROGEN FROM SAID CATALIST WITH A GAS NOT HAVING A REDUCING ACTION ON SAID OXIDE OF NITROGEN, AND THEREAFTER SUBJECTING SAID CATALYST TO A REDUCING TREATMENT WITH HYDROGEN AT A TEMPERATURE OF FROM ABOUT 25*C. TO ABOUT 1000*C.
Claim 3
Independent Claim
111 words
A METHOD FOR REACTIVATING A DEACTIVATED COBALT AND MOLYBDENUM-CONTAINING, REFRACTORY INORGANIC OXIDE CATALYST WITHOUT REMOVING THE COBALT AND MOLYBDENUM THEREFROM WHICH COMPRISES OXIDIZING SAID DEACTIVATED CATALYST WITH AIR AT A TEMPERATURE OF FROM ABOUT 300*C. TO ABOUT 700*C., THEREAFTER TREATING SAID CATALYST, AT A TEMPERATURE OF FROM ABOUT 25*C. TO ABOUT 1000*C., WITH AN OXIDE OF NITROGEN SELECTED FROM THE GROUP CONSISTING OF N2O3, NO2, N2O5 AND MIXTURES THEREOF, STRIPPING SAID OXIDE OF NITROGEN FROM SAID CATALYST WITH A GAS NOT HAVING A REDUCING ACTION ON SAID OXIDE OF NITROGEN, AND THEREAFTER SUBJECTING SAID CATALYST TO A REDUCING TREATMENT WITH HYDROGEN AT A TEMPERATURE OF FROM ABOUT 25*C. TO ABOUT 1000*C.
Claim 4
Independent Claim
111 words
A METHOD FOR REACTIVATING A DEACTIVATED COBALT AND MOLYBDENUM-CONTAINING, REFRACTORY INORGANIC OXIDE CATALYST WITHOUT REMOVING THE COBALT AND MOLYBDENUM THEREFROM WHICH COMPRISES OXIDIZING SAID DEACTIVATED CATALYST WITH AIR AT A TEMPERATURE OF FROM ABOUT 300*C. TO ABOUT 700*C., THEREAFTER TREATING SAID CATALYST, AT A TEMPERATURE OF FROM ABOUT 25*C. TO ABOUT 1000*C., WITH AN OXIDE OF NITROGEN SELECTED FROM THE GROUP CONSISTING OF N2O3, NO2, N2O5 AND MIXTURES THEREOF, STRIPPING SAID OXIDE OF NITROGEN FROM SAID CATALYST WITH A GAS NOT HAVING A REDUCING ACTION ON SAID OXIDE OF NITROGEN, AND THEREAFTER SUBJECTING SAID CATALYST TO A REDUCING TREATMENT WITH HYDROGEN AT A TEMPERATURE OF FROM ABOUT 25*C. TO ABOUT 1000*C.
Claim 5
Independent Claim
119 words
A METHOD OF REACTIVATING A DEACTIVATED ALUMINACOBALT-MOLYBDENUM CATALYST WITHOUT REMOVING THE COBALT AND MOLYBDENUM THEREFROM WHICH COMPRISES OXIDIZING DEACTIVATED CATALYSTS IN AIR AT A TEMPERATURE OF FROM ABOUT 300*C. TO ABOUT 700*C. THEREAFTER SUBJECTING SAID CATALYST TO TREATMENT, AT A TEMPERATURE OF FROM ABOUT 25* C. TO ABOUT 100*C. AND IN THE PRESENCE OF HALOGEN IN EXCESS OF 10% BY WEIGHT, WITH AN OXIDE OF NITROGEN SELECTED FROM THE GROUP CONSISTING OF N2O3, NO2, N2O5 AND MIXTURES THEREOF, STRIPPING SAID OXIDE OF NITROGEN FROM SAID CATALYST WITH A GAS NOT HAVING A REDUCING ACTION ON SAID OXIDE OF NITROGEN, AND THEREAFTER SUBJECTING SAID CATALYST TO A REDUCING TREATMENT WITH HYDROGEN AT A TEMPERATURE OF FROM ABOUT 25*C. ABOUT 100*C.
Claim 6
Independent Claim
119 words
A METHOD OF REACTIVATING A DEACTIVATED ALUMINACOBALT-MOLYBDENUM CATALYST WITHOUT REMOVING THE COBALT AND MOLYBDENUM THEREFROM WHICH COMPRISES OXIDIZING DEACTIVATED CATALYSTS IN AIR AT A TEMPERATURE OF FROM ABOUT 300*C. TO ABOUT 700*C. THEREAFTER SUBJECTING SAID CATALYST TO TREATMENT, AT A TEMPERATURE OF FROM ABOUT 25* C. TO ABOUT 100*C. AND IN THE PRESENCE OF HALOGEN IN EXCESS OF 10% BY WEIGHT, WITH AN OXIDE OF NITROGEN SELECTED FROM THE GROUP CONSISTING OF N2O3, NO2, N2O5 AND MIXTURES THEREOF, STRIPPING SAID OXIDE OF NITROGEN FROM SAID CATALYST WITH A GAS NOT HAVING A REDUCING ACTION ON SAID OXIDE OF NITROGEN, AND THEREAFTER SUBJECTING SAID CATALYST TO A REDUCING TREATMENT WITH HYDROGEN AT A TEMPERATURE OF FROM ABOUT 25*C. ABOUT 100*C.
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) | 1963-12-06 | 1964-06-06 | 1964-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-06 | 1968-06-06 | 1968-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-06 | 1972-06-06 | 1972-12-06 | $7700.00 | Window Closed / Lapsed |