Patent US2775632A successfully refreshed from Google Patents.
US2775632A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of aromatic hydrocarbons
Assignee: Sunoco Inc
•
Filing: 1953-05-13
•
Granted: 1956-12-25
•
Expires: 1973-05-13
Abstract
No abstract record available.
Inventors
- 👤 Earl M Honeycutt
- 👤 James R Calkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:46
CPC Classifications
C; C07; C07C; C07C15/00; C07C15/02; C10; C10G; C10G21/00; C10G25/00; C10G25/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
IN A PROCESS OF MAKING NITRATION GRADE AROMATIC HYDROCARBON WHICH COMPRISES REFORMING A PETROLEUM NAPHTHA, EXTRACTING THE REFORMATE WITH A WATER SOLUBLE SOLVENT TO YIELD AN AROMATIC RICH HYDROCARBON FRACTION CONTAINING A MINOR AMOUNT OF SAID SOLVENT, AND WATER WASHING SAID AROMATIC RICH FRACTION TO REMOVE SAID SOLVENT, THE STEPS WHICH COMPRISE REMOVING WATER FROM THE WATER WASHED AROMATIC FRACTION TO YIELD AN AROMATIC STOCK HAVING A WATER CONTENT LESS THAN 200 P. P. M., TREATING SAID STOCK IN LIQUID PHASE AT A TEMPERATURE BETWEEN 275* F. AND ITS CRITICAL TEMPERATURE WITH ADSORPTIVE CLAY HAVING A COMBINED WATER CONTENT BETWEEN 4.5% AND 7.5% BY WEIGHT, AND RECOVERING FROM THE TREATED MATERIAL NITRATION GRADE AROMATIC PRODUCT IN A YIELD EXCEEDING 2000 BARRELS PER TON OF CLAY.
Claim 2
Dependent Claim
125 words
IN A PROCESS OF MAKING NITRATION GRADE AROMATIC HYDROCARBON WHICH COMPRISES REFORMING A PETROLEUM NAPHTHA, EXTRACTING THE REFORMATE WITH A WATER SOLUBLE SOLVENT TO YIELD AN AROMATIC RICH HYDROCARBON FRACTION CONTAINING A MINOR AMOUNT OF SAID SOLVENT, AND WATER WASHING SAID AROMATIC RICH FRACTION TO REMOVE SAID SOLVENT, THE STEPS WHICH COMPRISE REMOVING WATER FROM THE WATER WASHED AROMATIC FRACTION TO YIELD AN AROMATIC STOCK HAVING A WATER CONTENT LESS THAN 200 P. P. M., TREATING SAID STOCK IN LIQUID PHASE AT A TEMPERATURE BETWEEN 275* F. AND ITS CRITICAL TEMPERATURE WITH ADSORPTIVE CLAY HAVING A COMBINED WATER CONTENT BETWEEN 4.5% AND 7.5% BY WEIGHT, AND RECOVERING FROM THE TREATED MATERIAL NITRATION GRADE AROMATIC PRODUCT IN A YIELD EXCEEDING 2000 BARRELS PER TON OF CLAY.
References Cited (Backward Citations)
US2232761A
Cited
US2400802A
Cited
US2366570A
Cited
US2400355A
Cited
US2664202A
Cited
US2713552A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-25 | 1960-06-25 | 1960-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-25 | 1964-06-25 | 1964-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-25 | 1968-06-25 | 1968-12-25 | $7700.00 | Window Closed / Lapsed |