US2858279A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of drying a fluid hydroforming catalyst
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1952-09-30
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Granted: 1958-10-28
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Expires: 1972-09-30
Abstract
No abstract record available.
Inventors
- 👤 William P Drews
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:37
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B01J8/24; B01J8/26; B01J38/00; B01J38/04; B01J38/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
191 words
THE METHOD OF REDUCING THE WATER CONTENT OF A HYDROFORMING CATALYST PREVIOUSLY SPENT BY THE FORMATION OF CARBONACEOUS DEPOSITS THEREON DURING THE HYDROFORMING REACTION AND REGENERATED BY COMBUSTION TO REMOVE SAID CARBONACEOUS DEPOSITS WHILE MAINTAINED WITHIN A REGENERATION ZONE IN THE FORM OF A TURBULENT FLUID BED, WHICH COMPRISES WITHDRAWING FROM SAID FLUID BED A MAJOR STREAM OF REGENERATED CATALYST AND STRIPPING SAID MAJOR STREAM BY PASSING IT THROUGH A MAIN STRIPPING ZONE IN COUNTERCURRENT FLOW TO AN INERT STRIPPING GAS CONTAINING LESS THAN 1 MOL PERCENT OF WATER, SEPARATELY WITHDRAWING FROM SAID REGENERATION ZONE A MINOR STREAM OF REGENERATED CATALYST AND PASSING MINOR STREAM THROUGH AN AUXILIARY STRIPPING ZONE MAINTAINED WITHIN AND IN HEAT EXCHANGE RELATIONSHIP OF SAID FLUID BED OF CATALYST, MAINTAINING THE CATALYST WITHIN SAID AUXILIARY STRIPPING ZONE FOR A RESIDENCE TIME OF FROM ABOUT 10 TO 100 TIMES THE RESIDENCE TIME OF THE CATALYST IN SAID MAIN STREAM IN SAID MAIN STRIPPING ZONE, PASSING AN INERT STRIPPING GAS CONTAINAING LESS THAN 1 MOL PERCENT OF WATER IN COUNTERCURRENT FLOW WITH THE CATALYST IN SAID AUXILIARY STRIPPING ZONE TO REMOVE A GREATER AMOUNT OF WATER THEREFROM AND COM-
Claim 2
Independent Claim
191 words
THE METHOD OF REDUCING THE WATER CONTENT OF A HYDROFORMING CATALYST PREVIOUSLY SPENT BY THE FORMATION OF CARBONACEOUS DEPOSITS THEREON DURING THE HYDROFORMING REACTION AND REGENERATED BY COMBUSTION TO REMOVE SAID CARBONACEOUS DEPOSITS WHILE MAINTAINED WITHIN A REGENERATION ZONE IN THE FORM OF A TURBULENT FLUID BED, WHICH COMPRISES WITHDRAWING FROM SAID FLUID BED A MAJOR STREAM OF REGENERATED CATALYST AND STRIPPING SAID MAJOR STREAM BY PASSING IT THROUGH A MAIN STRIPPING ZONE IN COUNTERCURRENT FLOW TO AN INERT STRIPPING GAS CONTAINING LESS THAN 1 MOL PERCENT OF WATER, SEPARATELY WITHDRAWING FROM SAID REGENERATION ZONE A MINOR STREAM OF REGENERATED CATALYST AND PASSING MINOR STREAM THROUGH AN AUXILIARY STRIPPING ZONE MAINTAINED WITHIN AND IN HEAT EXCHANGE RELATIONSHIP OF SAID FLUID BED OF CATALYST, MAINTAINING THE CATALYST WITHIN SAID AUXILIARY STRIPPING ZONE FOR A RESIDENCE TIME OF FROM ABOUT 10 TO 100 TIMES THE RESIDENCE TIME OF THE CATALYST IN SAID MAIN STREAM IN SAID MAIN STRIPPING ZONE, PASSING AN INERT STRIPPING GAS CONTAINAING LESS THAN 1 MOL PERCENT OF WATER IN COUNTERCURRENT FLOW WITH THE CATALYST IN SAID AUXILIARY STRIPPING ZONE TO REMOVE A GREATER AMOUNT OF WATER THEREFROM AND COM-
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) | 1961-10-27 | 1962-04-28 | 1962-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-27 | 1966-04-28 | 1966-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-27 | 1970-04-28 | 1970-10-28 | $7700.00 | Window Closed / Lapsed |