US2713552A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extraction of aromatics from naphthas
Assignee: Standard Oil Co
•
Filing: 1951-10-17
•
Granted: 1955-07-19
•
Expires: 1971-10-17
Abstract
No abstract record available.
Inventors
- 👤 Arthur P Lien
- 👤 David A Mccaulay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:31
CPC Classifications
C; C10; C10G; C10G21/00; C10G21/06; C10G21/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
AN EXTRACTION PROCESS WHICH COMPRISES (1) CONTACTING A LIQUID FEED CONSISTING OF AROMATIC HYDROCARBONS AND NON-AROMATIC HYDROCARBONS BOILING IN THE NAPHTHA RANGE AND SUBSTANTIALLY NO OLEFINS, ORGANIC-SULFUR COMPOUND AND PHENOLIC COMPOUNDS, UNDER SUBSTANTIALLY ANHYDROUS CONDITIONS, AT A TEMPERATURE BETWEEN ABOUT 3* F. AND 160* F., WITH A LIQUID AGENT CONSISTING OF BETWEEN 3.8 AND 1.5 MOLS OF SILVER FLUORIDE PER MOL OF AROMATIC HYDROCARBON IN SAID FEED AND AT LEAST 200 VOLUME PER CENT, BASED ON AROMATIC HYDROCARBONS IN SAID FEED, OF SUBSTANTIALLY ANHYDROUS LIQUID HYDROGEN FLUORIDE, (2) SEPARATING A RAFFINATE PHASE FROM AN EXTRACT PHASE AND (3) REMOVING FH AND AFG FROM SAID EXTRACT PHASE TO RECOVER AN EXTRACT CONSISTING OF AT LEAST 96 VOLUME PER CENT OF AROMATIC HYDROCARBONS.
Claim 2
Dependent Claim
121 words
AN EXTRACTION PROCESS WHICH COMPRISES (1) CONTACTING A LIQUID FEED CONSISTING OF AROMATIC HYDROCARBONS AND NON-AROMATIC HYDROCARBONS BOILING IN THE NAPHTHA RANGE AND SUBSTANTIALLY NO OLEFINS, ORGANIC-SULFUR COMPOUND AND PHENOLIC COMPOUNDS, UNDER SUBSTANTIALLY ANHYDROUS CONDITIONS, AT A TEMPERATURE BETWEEN ABOUT 3* F. AND 160* F., WITH A LIQUID AGENT CONSISTING OF BETWEEN 3.8 AND 1.5 MOLS OF SILVER FLUORIDE PER MOL OF AROMATIC HYDROCARBON IN SAID FEED AND AT LEAST 200 VOLUME PER CENT, BASED ON AROMATIC HYDROCARBONS IN SAID FEED, OF SUBSTANTIALLY ANHYDROUS LIQUID HYDROGEN FLUORIDE, (2) SEPARATING A RAFFINATE PHASE FROM AN EXTRACT PHASE AND (3) REMOVING FH AND AFG FROM SAID EXTRACT PHASE TO RECOVER AN EXTRACT CONSISTING OF AT LEAST 96 VOLUME PER CENT OF AROMATIC HYDROCARBONS.
References Cited (Backward Citations)
US2114524A
Cited
US2246257A
Cited
US2391404A
Cited
US2378762A
Cited
US2403972A
Cited
US2450588A
Cited
US2639303A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-07-18 | 1959-01-17 | 1959-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-07-18 | 1963-01-17 | 1963-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-07-18 | 1967-01-17 | 1967-07-19 | $7700.00 | Window Closed / Lapsed |