US3594444A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for separating hydrocarbons and hydrogen fluoride catalyst from the effluent of an isoparaffin-olefin alkylation reaction zone
Assignee: Universal Oil Products Co
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Filing: 1969-06-09
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Granted: 1971-07-20
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Expires: 1989-06-09
Abstract
Abstract PROCESS FOR SEPARATING HYDROCARBONS AND HYDROGEN FLUORIDE CATALYST FROM THE TOTAL HYDROGEN FLUORIDE-HYDROCARBON EFFLUENT OF AN ISOPARAFFIN-OLEFIN ALKYLATION REACTION ZONE IN A PROCESSING SYSTEM WHEREIN A VAPOR FRACTION COMPRISING PROPANE AND ISOPARAFFINIC HYDROCARBONS IS PARTIALLY CONDENSED IN AN EXTERNAL HEAT EXCHANGER MEANS UTILIZING HYDROCARBON SEPARATED IN A FIRST SEPARATION ZONE AS THE MEDIUM FOR INDIRECT HEAT EXCHANGE AND WHEREIN THE DESIRED ALKYLATED FRACTION IS PASSED TO SECOND SEPARATION ZONE REBOILER MEANS AS THE SOLE SOURCE OF HEAT TO THIS REBOILER PRIOR TO RECOVERY.
Inventors
- 👤 Edwin K Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:37
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/54; C07C2/56; C07C2/58; C07C2/62; C07C2527/00; C07C2527/06; C07C2527/08; C07C2527/12; C07C2527/1206
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) | 1974-07-19 | 1975-01-18 | 1975-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-19 | 1979-01-18 | 1979-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-19 | 1983-01-18 | 1983-07-20 | $7700.00 | Window Closed / Lapsed |