US3793394A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of hf catalyst in alkylation process
Assignee: Phillips Petroleum Co
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Filing: 1972-05-08
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Granted: 1974-02-19
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Expires: 1992-05-08
Abstract
Abstract OLEFINS AND ISOPARAFFINS ARE ALKYLATED IN THE PRESENCE OF AN HF CATALYST. REACTOR EFFLUENT IS PASSED TO A SETTLING ZONE. THE HYDROCARBON PHASE IS FRACTIONATED TO RECOVER AN ALKYLATE PRODUCT. THE ACID PHASE IS RECYCLED TO THE REACTOR. A PORTION OF THE RECYCLED ACID IS PASSED TO A PURIFICATION COLUMN FOR REMOVAL OF ACID SOLUBLE OIL. STRIPPING VAPOR AND REFLUX LIQUID ARE PASSED TO THE PURIFICATION COLUMN TO REMOVE SUBSTANTIALLY ALL OF THE HF FROM THE ACID SOLUBLE OIL. A SUBSTANTIAL PORTION OF THE ACID SOLUBLE OIL REMOVED FROM THE PURIFICATION COLUMN IS CONTACTED EXTERNALLY WITH STRIPPING VAPOR AND REINTRODUCED INTO THE PURIFICATION COLUMN.
Inventors
- 👤 C Chapman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:15
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/54; C07C2/56; C07C2/58; C07C2/62; B; B01; B01J; B01J27/00; B01J27/28; B01J27/32; C07C2527/00; C07C2527/06; C07C2527/08; C07C2527/12; C07C2527/1206; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/582; Y02P20/584; Y10; Y10S; Y10S585/00; Y10S585/919; Y10S585/921
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-18 | 1977-08-20 | 1978-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-18 | 1981-08-20 | 1982-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-18 | 1985-08-20 | 1986-02-19 | $7700.00 | Window Closed / Lapsed |