US3708420A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalyst transfer in a plural bed hydrogenation process
Assignee: Individual
•
Filing: 1971-02-25
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Granted: 1973-01-02
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Expires: 1991-02-25
Abstract
Abstract The invention relates to a process for the hydrogenation of hydrocarbon feedstocks in a reactor comprising a number of catalyst beds through which fluidized catalyst descends in countercurrent to feed and hydrogen. The invention provides a catalyst transfer system whereby the catalyst is moved in batches from an upper to the next lower bed by an external catalyst transfer pipe provided with an inlet for hydrogen.
Inventors
- 👤 R Irvine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:39
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/0015; B01J8/003; C; C10; C10G; C10G45/00; C10G45/02; C10G45/14; C10G45/18
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
21 words
A process as claimed in claim 1 wherein the catalyst transfer pipe is provided with cold quench injection for heat removal.
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) | 1976-01-02 | 1976-07-03 | 1977-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-02 | 1980-07-03 | 1981-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-02 | 1984-07-03 | 1985-01-02 | $7700.00 | Window Closed / Lapsed |