US3192283A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of halogenated carboxylic acid catalyst
Assignee: Shell USA Inc
•
Filing: 1963-03-22
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Granted: 1965-06-29
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Expires: 1983-03-22
Abstract
No abstract record available.
Inventors
- 👤 Robert B Mosely
- 👤 Holzman George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:17
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/54; C07C2/56; C07C2/58; C07C2/62; C07C2527/00; C07C2527/02; C07C2527/053; C07C2527/054
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
131 words
IN A PROCESS FOR ALKYLATING ISOPARAFFIN WITH OLEFIN IN THE PRESENCE OF AN ACID CATALYST COMRISING A MIXTURE OF CONCENTRATED SULFURIC ACID AND TRIFLUOROACETIC ACID, IN WHICH PROCESS HYDROCARBON EFFLUENT CONTAINING TRIFLUOROACETIC ACID IS SEPARATED FROM THE ACID CATALYST AND SPENT ACID CONTAINING TRIFLUOROACETIC ACID IS REJECTED FROM THE PROCESS, THE IMPROVEMENT WHICH COMPRISES WASHNG THE HYDROCARBON EFFLUENT CONTAINING TRIFLUOROACETIC ACID WITH WATER TO REMOVE THE ACID, COMBINING AT LEAST A PORTION OF THE WASH WATER CONTAINING TRIFLUOROACETIC ACID WITH THE REJECTED SPENT ACID CONTAINING TRIFLUOROACETIC ACID SUCH THAT THE ACID CONTAINS FROM ABOUT 5% TO ABOUT 40% W. WATER, BASIS SULFURIC ACID, CONTACTING THE COMBINED WASH WATER AND REJECTED ACID IN AN EXTRACTION ZONE WITH LIQUID ISOPARAFFIN, WITHDRAWING FROM THE EXTRACTION ZONE WATER AND REJECTED CATALYST SUBSTANTIALLY REDUCED IN CON-
References Cited (Backward Citations)
US2981772A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-06-28 | 1968-12-28 | 1969-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-28 | 1972-12-28 | 1973-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-28 | 1976-12-28 | 1977-06-29 | $7700.00 | Window Closed / Lapsed |