US2754341A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aromatic alkylation
Assignee: American Oil Co
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Filing: 1954-05-13
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Granted: 1956-07-10
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Expires: 1974-05-13
Abstract
No abstract record available.
Inventors
- 👤 Kirkland Earl Vance
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:20
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/54; C07C2/64; C07C2/66; C07C2/70; C07C2527/00; C07C2527/06; C07C2527/08; C07C2527/12; C07C2527/1213; C07C2527/14; C07C2527/16; C07C2527/167; C07C2527/173
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
AN ALKYLATION PROCESS WHICH COMPRISES (A) CONTACTING, AT CONSTANT PRESSURE, A LIQUID AROMATIC HYDROCARBON WITH PROPYLENE AT A TEMPERATURE BETWEEN ABOUT 25* C. AND 150* C., IN THE PRESENCE OF A CATALYST CONSISTING OF SOLID PHOSPHORIC ACID SATURATED WITH BF3, (B) CONTINUOUSLY INTRODUCING BF3 AND SAID PROPYLENE INTO SAID CONTACTING ZONE THROUGHOUT THE CONTACTING TIME WHEREIN THE RATE OF BF3 INTRODUCTION IS BETWEEN 0.02 AND 0.1 MOLES PER MOLE OF SAID AROMATIC HYDROCARBON PER HOUR OF CONTACTING TIME, (C) SEPARATING REACTION PRODUCT MIXTURE FROM SAID CATALYST AND (D) RECOVERING ISOPROPYLAROMATIC HYDROCARBONS FROM SAID MIXTURE.
Claim 2
Dependent Claim
94 words
AN ALKYLATION PROCESS WHICH COMPRISES (A) CONTACTING, AT CONSTANT PRESSURE, A LIQUID AROMATIC HYDROCARBON WITH PROPYLENE AT A TEMPERATURE BETWEEN ABOUT 25* C. AND 150* C., IN THE PRESENCE OF A CATALYST CONSISTING OF SOLID PHOSPHORIC ACID SATURATED WITH BF3, (B) CONTINUOUSLY INTRODUCING BF3 AND SAID PROPYLENE INTO SAID CONTACTING ZONE THROUGHOUT THE CONTACTING TIME WHEREIN THE RATE OF BF3 INTRODUCTION IS BETWEEN 0.02 AND 0.1 MOLES PER MOLE OF SAID AROMATIC HYDROCARBON PER HOUR OF CONTACTING TIME, (C) SEPARATING REACTION PRODUCT MIXTURE FROM SAID CATALYST AND (D) RECOVERING ISOPROPYLAROMATIC HYDROCARBONS FROM SAID MIXTURE.
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) | 1959-07-10 | 1960-01-09 | 1960-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-10 | 1964-01-09 | 1964-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-10 | 1968-01-09 | 1968-07-10 | $7700.00 | Window Closed / Lapsed |