US3211668A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rejuvenation of nitrogen compoundpoisoned catalysts
Assignee: California Research LLC
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Filing: 1963-01-30
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Granted: 1965-10-12
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Expires: 1983-01-30
Abstract
No abstract record available.
Inventors
- 👤 Yamamoto Sachio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:22
CPC Classifications
B; B01; B01J; B01J27/00; B01J27/02; B01J27/04; B01J27/28; B01J27/30; B01J38/00; Y; Y10; Y10S; Y10S502/00; Y10S502/515
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
A METHOD FOR REJUVENATING A CATALYST THAT CONTAINS, AS A NECESSARY COMPONENT, A SOLID, ACIDIC COMPOSITE POSSESSING CATALYTIC CRACKING ACTIVITY ATTRIBUTABLE TO THE PRESENCE OF ACID SITES UPON SAID COMPOSTIE, SAID CATALYST HAVING BEEN DEACTIVATED BY TITRATION OF SAID ACID SITES BY CONTACT WITH A BASIC NITROGEN-CONTAINING COMPOUND THEREBY AT ELAST PARTIALLY NEUTRALIZING SAI D ACID SITES AND REDUCING SAID CATALYSTS CRACKING ACTIVITY, SAID METHOD COMPRISING CONTACTING THE DEACTIVATED CATALYST WITH AT LEAST 1000 VOLUMES OF AN INERT GAS PER VOLUME OF CATALYST AT A TEMPERATURE OF AT LEAST 800*F.
Claim 2
Independent Claim
90 words
A METHOD FOR REJUVENATING A CATALYST THAT CONTAINS, AS A NECESSARY COMPONENT, A SOLID, ACIDIC COMPOSITE POSSESSING CATALYTIC CRACKING ACTIVITY ATTRIBUTABLE TO THE PRESENCE OF ACID SITES UPON SAID COMPOSTIE, SAID CATALYST HAVING BEEN DEACTIVATED BY TITRATION OF SAID ACID SITES BY CONTACT WITH A BASIC NITROGEN-CONTAINING COMPOUND THEREBY AT ELAST PARTIALLY NEUTRALIZING SAI D ACID SITES AND REDUCING SAID CATALYSTS CRACKING ACTIVITY, SAID METHOD COMPRISING CONTACTING THE DEACTIVATED CATALYST WITH AT LEAST 1000 VOLUMES OF AN INERT GAS PER VOLUME OF CATALYST AT A TEMPERATURE OF AT LEAST 800*F.
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) | 1968-10-11 | 1969-04-12 | 1969-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-11 | 1973-04-12 | 1973-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-11 | 1977-04-12 | 1977-10-12 | $7700.00 | Window Closed / Lapsed |