Patent US2963445A successfully refreshed from Google Patents.
US2963445A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reactivating platinum catalyst
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
2026-10-30 11:05
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/90; B01J23/96
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
113 words
A METHOD FOR REACTIVATING A DEACTIVATED PLATINUMCONTAINING REFACTORY OXIDE CATALYST WITH COMPRISES OXIDIZING SAID DEACTIVATED CATALYST IN AIR AT A TEMPERATURE OF FROM ABOUT 3000*C. TO ABOUT 7000*C., THEREAFTER TREATING THE AIR-OXIDIZED CATALYST AT A TEMPERATURE OF FROM ABOUT 28*C. TO 1000*C. IN THE PRESENCE OF HALOGEN IN EXCESS OD 0.1% 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 PLATINUM-CONTAINING 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 2
Independent Claim
113 words
A METHOD FOR REACTIVATING A DEACTIVATED PLATINUMCONTAINING REFACTORY OXIDE CATALYST WITH COMPRISES OXIDIZING SAID DEACTIVATED CATALYST IN AIR AT A TEMPERATURE OF FROM ABOUT 3000*C. TO ABOUT 7000*C., THEREAFTER TREATING THE AIR-OXIDIZED CATALYST AT A TEMPERATURE OF FROM ABOUT 28*C. TO 1000*C. IN THE PRESENCE OF HALOGEN IN EXCESS OD 0.1% 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 PLATINUM-CONTAINING 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 3
Independent Claim
91 words
A METHOD FOR REACATIVING A DEACTIVATED PLATINUMALUMINA-CHLORIDE CATALYST WHICH COMPRISES OXIDIZING SAID DEACTIVATED CATALYST IN AIR AT A TEMPERATURE OF FROM ABOUT 3000*C. TO ABOUT 7000*C., THEREAFTER THREATING THE AIR-OXIDIZED CATALYST, AT A TEMPERATURE OF FROM ABOUT 25* C. TO ABOUT 1000*C., WITH AN OXIDE OF NITROGEN SELECTED FROM THE GROUP CONSISTING OC N2O3, NO2, AND N2O5, REMOVING SAID OXIDE OF NITROGEN BY SWEEPING WITH AIR, WITHOUT REMOVING SAID PLATINUM, 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
91 words
A METHOD FOR REACATIVING A DEACTIVATED PLATINUMALUMINA-CHLORIDE CATALYST WHICH COMPRISES OXIDIZING SAID DEACTIVATED CATALYST IN AIR AT A TEMPERATURE OF FROM ABOUT 3000*C. TO ABOUT 7000*C., THEREAFTER THREATING THE AIR-OXIDIZED CATALYST, AT A TEMPERATURE OF FROM ABOUT 25* C. TO ABOUT 1000*C., WITH AN OXIDE OF NITROGEN SELECTED FROM THE GROUP CONSISTING OC N2O3, NO2, AND N2O5, REMOVING SAID OXIDE OF NITROGEN BY SWEEPING WITH AIR, WITHOUT REMOVING SAID PLATINUM, AND THEREAFTER SUBJECTING SAID CATALYST TO A REDUCING TREATMENT WITH HYDROGEN AT A TEMPERATURE OF FROM ABOUT 25*C. TO ABOUT 1000*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 |