Patent US4914256A successfully refreshed from Google Patents.
US4914256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reactivation of partially deactivated catalyst employing ultrasonic energy
Assignee: ExxonMobil Oil Corp
•
Filing: 1988-06-30
•
Granted: 1990-04-03
•
Expires: 2008-06-30
Abstract
Abstract A solid catalyst composition which has undergone a partial loss of catalytic activity due to the accumulation of reaction product residue is treated in a chemical conversion process reaction zone in the presence of feedstock(s) with ultrasonic energy of a magnitude and a duration sufficient to restore at least a significant percentage of the lost activity.
Inventors
- 👤 Paul G. Rodewald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:33
CPC Classifications
B; B01; B01J; B01J37/00; B01J37/34; B01J37/341; B01J37/343; B01J27/00; B01J27/28; B01J27/32; C; C07; C07C; C07C2/00; C07C2/54; C07C2/56; C07C2/58; C07C2/60; C07C2521/00; C07C2521/18; C07C2527/00; C07C2527/06; C07C2527/08; C07C2527/12; C07C2527/1213; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/584; Y10; Y10S; Y10S502/00; Y10S502/522; Y10S585/00; Y10S585/949; Y10S585/953
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
97 words
In a catalyzed alkylation process employing a solid boron-containing catalyst composition which undergoes a loss of activity due to accumulation of solid contaminant on the catalyst, the improvement which comprises subjecting the catalyst after it has undergone a partial but less than complete loss of activity due to solid contaminant accumulation with ultrasonic energy within a chemical conversion zone containing a liquid feedstock, the catalyst being present therein, the magnitude of such ultrasonic energy and its duration being sufficient to restore a substantial percentage of the lost activity of the catalyst, wherein said catalyst includes boron trifluoride.
Claim 2
Dependent Claim
97 words
In a catalyzed alkylation process employing a solid boron-containing catalyst composition which undergoes a loss of activity due to accumulation of solid contaminant on the catalyst, the improvement which comprises subjecting the catalyst after it has undergone a partial but less than complete loss of activity due to solid contaminant accumulation with ultrasonic energy within a chemical conversion zone containing a liquid feedstock, the catalyst being present therein, the magnitude of such ultrasonic energy and its duration being sufficient to restore a substantial percentage of the lost activity of the catalyst, wherein said catalyst includes boron trifluoride.
Claim 3
Dependent Claim
16 words
The alkylation process of claim 1 wherein the solid boron-containing catalyst is a boron trifluoride-graphite intercalate.
References Cited (Backward Citations)
US2578377A
Cited
US2742408A
Cited
US2800444A
Cited
US3245892A
Cited
US3231513A
Cited
US3505207A
Cited
US4086184A
Cited
US3976714A
Cited
US4083885A
Cited
US4062696A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-04-02 | 1993-10-02 | 1994-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-02 | 1997-10-02 | 1998-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-02 | 2001-10-02 | 2002-04-03 | $7700.00 | Window Closed / Lapsed |