US3317622A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polycyclic aromatics for hydrodealkylation
Assignee: Ashland LLC
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Filing: 1965-04-14
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Granted: 1967-05-02
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Expires: 1985-04-14
Abstract
No abstract record available.
Inventors
- 👤 Jr Charles D Hoertz
- 👤 Green William Sidney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:05
CPC Classifications
C; C10; C10G; C10G47/00; C10G2400/00; C10G2400/30
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
135 words
A METHOD FOR KEALKYLATION OF A LIUQID HYROCARBON FRACTION, COMPRISING: EXTRACTING ARMOATICS FROM A LIQUID HYDROCARBON FRACTION BOILING BETWEEN ABOUT 550* AND 850*F. AND CONTINING ALKYLATED AROMATICS WITH AN AROMATIC SELECTIVE SOLVENT; OXIDIZING SAID EXTRACTED AROMATIC MIXTURE AT AN ELEVATED TEMPERATURE UNTIL SAID OXIDIZED AROMATIC MIXTURE HAS A SOFTENING POINT BETWEEN ABOUT 50 AND 300*F. IS OBTAINED; SEPARATING A HYDRDEALKYLATION FEED STOCK BOILING BELOW ABOUT 740*F. FROM A HIGHER BOILING FRACTION CONTAINING COKE PRECURSORS; AND SUBJECTING SAID HYDRODEALKYLATION FEED STOCK TO A HYDRODEALKYLATION REACTION, IN THE PRESENCE OF A HYDRODEALKYLATION CATALYST CONTAINING MOLYBDIC TRIOXIDE AND COBALT OXIDE AS ACTIVE INGREDIENTS AND, UNDER THE FOLLOWING CONDITIONS; A TEMPERATURE BETWEEN 1100 AND 1400*F., A WEIGHT-HOURLY SPACE VELOCITY OF 0.2 TO 2, A HYDROGEN TO HYDROCARBON RATIO OF 10:1 TO 30:1, A PRESSURE BETWEEN ATMOSPHERIC AND 1000 P.S.I.
Claim 2
Independent Claim
135 words
A METHOD FOR KEALKYLATION OF A LIUQID HYROCARBON FRACTION, COMPRISING: EXTRACTING ARMOATICS FROM A LIQUID HYDROCARBON FRACTION BOILING BETWEEN ABOUT 550* AND 850*F. AND CONTINING ALKYLATED AROMATICS WITH AN AROMATIC SELECTIVE SOLVENT; OXIDIZING SAID EXTRACTED AROMATIC MIXTURE AT AN ELEVATED TEMPERATURE UNTIL SAID OXIDIZED AROMATIC MIXTURE HAS A SOFTENING POINT BETWEEN ABOUT 50 AND 300*F. IS OBTAINED; SEPARATING A HYDRDEALKYLATION FEED STOCK BOILING BELOW ABOUT 740*F. FROM A HIGHER BOILING FRACTION CONTAINING COKE PRECURSORS; AND SUBJECTING SAID HYDRODEALKYLATION FEED STOCK TO A HYDRODEALKYLATION REACTION, IN THE PRESENCE OF A HYDRODEALKYLATION CATALYST CONTAINING MOLYBDIC TRIOXIDE AND COBALT OXIDE AS ACTIVE INGREDIENTS AND, UNDER THE FOLLOWING CONDITIONS; A TEMPERATURE BETWEEN 1100 AND 1400*F., A WEIGHT-HOURLY SPACE VELOCITY OF 0.2 TO 2, A HYDROGEN TO HYDROCARBON RATIO OF 10:1 TO 30:1, A PRESSURE BETWEEN ATMOSPHERIC AND 1000 P.S.I.
Claim 3
Dependent Claim
58 words
A HYDRODEALKYLATION FEED STOCK OBTAINED BY: OXIDIZING A LIQUID HYDROCARBON FRACTION BOILING BETWEEN ABOUT 550* AND 850*F. CONTAINING ALKYLATED AROMATICS AT AN ELEVATED TEMPERATURE UNTIL SAID OXIDIZED HYDROCARBON FRACTION HAS A SOFTENING POINT BETWEEN ABOUT 50* AND 300*F. AND SEPARATING A LOW BOILING HYDRODEALKYLATION FEED STOCK BOILING BELOW ABOUT 740*F. FROM A HIGHER BOILING FRACTION CONTAINING COKE PRECURSORS.
Claim 4
Dependent Claim
58 words
A HYDRODEALKYLATION FEED STOCK OBTAINED BY: OXIDIZING A LIQUID HYDROCARBON FRACTION BOILING BETWEEN ABOUT 550* AND 850*F. CONTAINING ALKYLATED AROMATICS AT AN ELEVATED TEMPERATURE UNTIL SAID OXIDIZED HYDROCARBON FRACTION HAS A SOFTENING POINT BETWEEN ABOUT 50* AND 300*F. AND SEPARATING A LOW BOILING HYDRODEALKYLATION FEED STOCK BOILING BELOW ABOUT 740*F. FROM A HIGHER BOILING FRACTION CONTAINING COKE PRECURSORS.
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) | 1970-05-01 | 1970-10-31 | 1971-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-01 | 1974-10-31 | 1975-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-01 | 1978-10-31 | 1979-05-02 | $7700.00 | Window Closed / Lapsed |