Patent US3070639A successfully refreshed from Google Patents.
US3070639A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of aromatic hydrocarbons using surface-modified solid adsorbent
Assignee: Pure Oil Co
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Filing: 1959-12-15
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Granted: 1962-12-25
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Expires: 1979-12-15
Abstract
No abstract record available.
Inventors
- 👤 Marcellus J Geerts
- 👤 John W Walsh
- 👤 Hillis O Folkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:46
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/12; B; B01; B01J; B01J20/00; B01J20/02; B01J20/0203; B01J20/0211; B01J20/0248; B01J20/0274; B01J20/0296; B01J20/04; B01J20/041; B01J20/06; B01J20/08; B01J20/10; B01J20/103; B01J20/28; B01J20/28054; B01J20/28057; B01J20/30; B01J20/3078; B01J20/32; B01J20/3202; B01J20/3204; B01J20/3231; B01J20/3234; B01J20/3236; C01; C01B; C01B33/00; C01B33/113; B01J2220/00; B01J2220/40; B01J2220/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
156 words
A METHOD OF SEPARATING AROMATIC HYDROCARBONS FROM ADMIXTURE WITH ALIPHATIC HYDROCARBONS WHICH COMPRISES CONTACTING THE LIQUID MIXTURE WITH A SOLID ADSORBENT SELECTED FROM THE GROUP CONSISTING OF ALUMINA, SILICA, AND SILICA-ALUMINA, WHICH HAS BEEN PREPARED BY TREATING THE ADSORBENT, IN THE FORM OF A HYDROGEL WHICH HAS BEEN PREDRIED BY HEATING TO A TEMPERATURE AT WHICH ONLY THE REVERSIBLE WATER CONTENT THEREOF IS REMOVED, WITH 1-100% OF THE STOICHIOMETRIC AMOUNT OF A COMPOUND, SELECTED FROM THE GROUP CONSISTING OF OXIDES, HYDROXIDES, AND NITRATES OF LITHIUM, BERYLLIUM, MAGNESIUM, ZIRCONIUM, AND BORON, REQUIRED TO REACT WITH HYDROXYL GROUPS IN THE ADSORBENT, FOLLOWED BY HEATING THE IMPREGNATED GEL TO A TEMPERATURE OF ABOUT 500*-1000*F. UNTIL REACTION WITH HYDROXYL GROUPS IN THE GEL IS COMPLETE AS EVIDENCED BY CESSATIOPN OF EVOLUTION OF WATER OR ACID VAPORS, SAID GEL BEING CHARACTERIZED BY INCREASED SURFACE-AREA INDEX AND INCREASED ADSORPTIVE CAPACITY FOR AROMATIC HYDROCARBONS, AND REECOVERING THE AROMATIC HYDROCARBON ADSORBED ON THE GEL.
Claim 2
Independent Claim
156 words
A METHOD OF SEPARATING AROMATIC HYDROCARBONS FROM ADMIXTURE WITH ALIPHATIC HYDROCARBONS WHICH COMPRISES CONTACTING THE LIQUID MIXTURE WITH A SOLID ADSORBENT SELECTED FROM THE GROUP CONSISTING OF ALUMINA, SILICA, AND SILICA-ALUMINA, WHICH HAS BEEN PREPARED BY TREATING THE ADSORBENT, IN THE FORM OF A HYDROGEL WHICH HAS BEEN PREDRIED BY HEATING TO A TEMPERATURE AT WHICH ONLY THE REVERSIBLE WATER CONTENT THEREOF IS REMOVED, WITH 1-100% OF THE STOICHIOMETRIC AMOUNT OF A COMPOUND, SELECTED FROM THE GROUP CONSISTING OF OXIDES, HYDROXIDES, AND NITRATES OF LITHIUM, BERYLLIUM, MAGNESIUM, ZIRCONIUM, AND BORON, REQUIRED TO REACT WITH HYDROXYL GROUPS IN THE ADSORBENT, FOLLOWED BY HEATING THE IMPREGNATED GEL TO A TEMPERATURE OF ABOUT 500*-1000*F. UNTIL REACTION WITH HYDROXYL GROUPS IN THE GEL IS COMPLETE AS EVIDENCED BY CESSATIOPN OF EVOLUTION OF WATER OR ACID VAPORS, SAID GEL BEING CHARACTERIZED BY INCREASED SURFACE-AREA INDEX AND INCREASED ADSORPTIVE CAPACITY FOR AROMATIC HYDROCARBONS, AND REECOVERING THE AROMATIC HYDROCARBON ADSORBED ON THE GEL.
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) | 1965-12-24 | 1966-06-25 | 1966-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-24 | 1970-06-25 | 1970-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-24 | 1974-06-25 | 1974-12-25 | $7700.00 | Window Closed / Lapsed |