US2914471A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Use of polyethylene to increase phase separation rate in solvent extraction process
Assignee: Sinclair Refining Co
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Filing: 1957-09-12
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Granted: 1959-11-24
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Expires: 1977-09-12
Abstract
No abstract record available.
Inventors
- 👤 Maurice K Rausch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:13
CPC Classifications
C; C10; C10G; C10G21/00; B; B01; B01D; B01D11/00; B01D11/04; B01D11/0492
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
IN A PROCESS FOR THE SOLVENT EXTRACTION OF A LIQUID HYDROCARBON CONTAINING AROMATIC AND NON-AROMATIC COMPONENTS, THE STEPS WHICH COMPRISE CONTRACTING SAID LIQUID HYDROCARBON IN A SOLVENT TREATING ZONE WITH A SOLVENT SELECTIVE FOR AROMATIC COMPONENTS OF THE SAID HYDROCARBON UNDER CONDITIONS WHICH WILL SECURE PHASE SEPARATION WHILE PROVIDING IN SAID ZONE ABOUT 0.5% TO 50.0% BY WEIGHT OF A WAXY HYDROCARBON HAVING A MELTING POINT FROM ABOUT 100* TO 190* F. AND A SMALL AMOUNT SUFFICIENT TO ENHANCE THE PHASE SEPARATION OF POLYETHYLENE DISPERSIBLE AS A LIQUID IN THE HYDROCARBON FEEDSTOCK, AND THEREAFTER SEPARATING THE HYDROCARBON FEESSTOCK, AND THEREAFTER SEPARATING THE EXTRACT PHASE FROM THE RAFFINATE PHASE.
Claim 2
Dependent Claim
108 words
IN A PROCESS FOR THE SOLVENT EXTRACTION OF A LIQUID HYDROCARBON CONTAINING AROMATIC AND NON-AROMATIC COMPONENTS, THE STEPS WHICH COMPRISE CONTRACTING SAID LIQUID HYDROCARBON IN A SOLVENT TREATING ZONE WITH A SOLVENT SELECTIVE FOR AROMATIC COMPONENTS OF THE SAID HYDROCARBON UNDER CONDITIONS WHICH WILL SECURE PHASE SEPARATION WHILE PROVIDING IN SAID ZONE ABOUT 0.5% TO 50.0% BY WEIGHT OF A WAXY HYDROCARBON HAVING A MELTING POINT FROM ABOUT 100* TO 190* F. AND A SMALL AMOUNT SUFFICIENT TO ENHANCE THE PHASE SEPARATION OF POLYETHYLENE DISPERSIBLE AS A LIQUID IN THE HYDROCARBON FEEDSTOCK, AND THEREAFTER SEPARATING THE HYDROCARBON FEESSTOCK, AND THEREAFTER SEPARATING THE EXTRACT PHASE FROM THE RAFFINATE PHASE.
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) | 1962-11-23 | 1963-05-25 | 1963-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-23 | 1967-05-25 | 1967-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-23 | 1971-05-25 | 1971-11-24 | $7700.00 | Window Closed / Lapsed |