US2727077A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of aromatic hydrocarbons from virgin naphtha
Assignee: American Oil Co
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Filing: 1951-08-10
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Granted: 1955-12-13
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Expires: 1971-08-10
Abstract
No abstract record available.
Inventors
- 👤 Fragen Nathan
- 👤 Mark C Hopkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:13
CPC Classifications
C; C10; C10G; C10G59/00; C10G59/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
166 words
THE METHOD OF OBTAINING BENZENE FROM A VIRGIN NAPHTHA CONTAINING CYCLOHEXANE AND METHYLCLOPTANE, WHICH METHOD COMPRISES FRACTIONATING SAID NAPHTHA TO OBTAIN A FIRST HEART CUT BOILING IN THE RANGE OF 150* F. TO 185* F., ENRICHING SAID FIRST HEART CUT WITH A RECYCLE STREAM WHICH IS RICHER IN CYCLOHEXANE THAN SAID FIRST HEART CUT, CONTACTING SAID DILUTE FIRST HEART CUT WITH A HYDROFORMING CATALYST UNDER CONDITIONS TO CONVERT MOST OF THE CYCLOHEXANE TO BENZENE, FRACTIONING THE PRODUCT FROM THE HYDROFORMING STEP TO OBTAIN A SECOND HEAT CUT BOILING IN THE RANGE OF ABOUT 150* F. TO 185* F., RECOVERING BENZENE FROM SAID SECOND HEART CUT, ISOMERIZING THAT PORTION OF THE SECOND HEART CUT FROM WHICH BENZENE HAS BEEN REMOVED TO COVERT AT LEAST A PART OF THE METHYLCYCLOPENTANE CONTAINED THEREIN TO CYCLOHEXANE, REMOVING COMPONENTS LOWER BOILING THAN ABOUT 157* F. FROM ISOMERIZATION PRODUCTS, AND RECYCLING COMPONENTS OF THE ISOMERIZATION PRODUCTS BOILING ABOVE 157* F. TO SERVE AS A SUPPLEMENT TO THE CHARGE IN THE ENRICHING STEP.
Claim 2
Independent Claim
166 words
THE METHOD OF OBTAINING BENZENE FROM A VIRGIN NAPHTHA CONTAINING CYCLOHEXANE AND METHYLCLOPTANE, WHICH METHOD COMPRISES FRACTIONATING SAID NAPHTHA TO OBTAIN A FIRST HEART CUT BOILING IN THE RANGE OF 150* F. TO 185* F., ENRICHING SAID FIRST HEART CUT WITH A RECYCLE STREAM WHICH IS RICHER IN CYCLOHEXANE THAN SAID FIRST HEART CUT, CONTACTING SAID DILUTE FIRST HEART CUT WITH A HYDROFORMING CATALYST UNDER CONDITIONS TO CONVERT MOST OF THE CYCLOHEXANE TO BENZENE, FRACTIONING THE PRODUCT FROM THE HYDROFORMING STEP TO OBTAIN A SECOND HEAT CUT BOILING IN THE RANGE OF ABOUT 150* F. TO 185* F., RECOVERING BENZENE FROM SAID SECOND HEART CUT, ISOMERIZING THAT PORTION OF THE SECOND HEART CUT FROM WHICH BENZENE HAS BEEN REMOVED TO COVERT AT LEAST A PART OF THE METHYLCYCLOPENTANE CONTAINED THEREIN TO CYCLOHEXANE, REMOVING COMPONENTS LOWER BOILING THAN ABOUT 157* F. FROM ISOMERIZATION PRODUCTS, AND RECYCLING COMPONENTS OF THE ISOMERIZATION PRODUCTS BOILING ABOVE 157* F. TO SERVE AS A SUPPLEMENT TO THE CHARGE IN THE ENRICHING STEP.
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) | 1958-12-12 | 1959-06-13 | 1959-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-12 | 1963-06-13 | 1963-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-12 | 1967-06-13 | 1967-12-13 | $7700.00 | Window Closed / Lapsed |