Patent US2592589A successfully refreshed from Google Patents.
US2592589A
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Production and separation of isomeric isopropylnaphthalenes
Assignee: Beazer East Inc
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Filing: 1948-07-08
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Granted: 1952-04-15
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Expires: 1968-07-08
Abstract
No abstract record available.
Inventors
- 👤 Joseph E Nickels
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:57
CPC Classifications
C; C07; C07C; C07C15/00; C07C15/20; C07C15/24; C07C2/00; C07C2/54; C07C2/64; C07C2/66; C07C7/00; C07C7/005; C07C7/14; C07C2521/00; C07C2521/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A PROCESS OF PRODUCING SUBSTANTIALLY PURE ALPHA- AND BETA-ISOPROPYL NAPHTHALENES FROM A MIXTURE THEREOF SUCH AS IS OBTAINED BY: ALKYLATING NAPHTHALENE UNDER HIGH PRESSURE IN THE PRESENCE OF AN EXCESS OF PROPYLENE IN LIQUID PHASE AT A TEMPERATURE OF 150* TO 300* C. IN THE PRESENCE OF AN ACTIVATED ALUMINA-SILICA CATALYST COMPRISING: DEHYDROGENATING THE MIXTURE OF ALPHA- AND BETA-ISOPROPYL NAPHTHALENES NON- DESTRUCTIVELY TO PRODUCE A MIXTURE OF ALPHA-AND BETA-ISOPROPENYL NAPHTHALENES, DISTILLING THE MIXTURE TO SEPARATE ALPHA- AND BETA-ISOPROPENYL NAPHTHALENES AND SEPARATELY HYDROGENATING THE ALPHA- AND BETAISOPROPENYL NAPTHALENES TO RECOVER RESPECTIVELY ALPHA- AND BETA-ISOPROPYL NAPHTHALENES, AND PURIFYING THE ALPHA- AND BETA-ISOPROPYL NAPHTHALENE PRODUCTS SEPARATELY BY DISTILLATION
Claim 2
Dependent Claim
105 words
A PROCESS OF PRODUCING SUBSTANTIALLY PURE ALPHA- AND BETA-ISOPROPYL NAPHTHALENES FROM A MIXTURE THEREOF SUCH AS IS OBTAINED BY: ALKYLATING NAPHTHALENE UNDER HIGH PRESSURE IN THE PRESENCE OF AN EXCESS OF PROPYLENE IN LIQUID PHASE AT A TEMPERATURE OF 150* TO 300* C. IN THE PRESENCE OF AN ACTIVATED ALUMINA-SILICA CATALYST COMPRISING: DEHYDROGENATING THE MIXTURE OF ALPHA- AND BETA-ISOPROPYL NAPHTHALENES NON- DESTRUCTIVELY TO PRODUCE A MIXTURE OF ALPHA-AND BETA-ISOPROPENYL NAPHTHALENES, DISTILLING THE MIXTURE TO SEPARATE ALPHA- AND BETA-ISOPROPENYL NAPHTHALENES AND SEPARATELY HYDROGENATING THE ALPHA- AND BETAISOPROPENYL NAPTHALENES TO RECOVER RESPECTIVELY ALPHA- AND BETA-ISOPROPYL NAPHTHALENES, AND PURIFYING THE ALPHA- AND BETA-ISOPROPYL NAPHTHALENE PRODUCTS SEPARATELY BY DISTILLATION
References Cited (Backward Citations)
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Cited
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Cited
US2416990A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-15 | 1955-10-15 | 1956-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-15 | 1959-10-15 | 1960-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-15 | 1963-10-15 | 1964-04-15 | $7700.00 | Window Closed / Lapsed |