US3205167A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solvent extraction of hydrocarbon mixtures
Assignee: BP PLC
•
Filing: 1962-04-18
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Granted: 1965-09-07
•
Expires: 1982-04-18
Abstract
No abstract record available.
Inventors
- 👤 Demeester Jacques
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:28
CPC Classifications
B; B01; B01D; B01D11/00; B01D11/04; B01D11/0488; C; C10; C10G; C10G21/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
A PROCESS FOR SOLVENT EXTRACTING A HYDROCARBON FEEDSTOCK COMPRISING CONTACTING THE FEEDSTOCK COUNTER-CURRENTLY WITH SOLVENT IN A FIRST EXTRACTION COLUMN AND RECOVERING FROM THE FIRST COLUMN A PRIMARY RAFFINATE AND A PRIMARY EXTRACT, CONTACTING THE PRIMARY RAFFINATE COUNTER-CURRENTLY WITH SOLVENT IN A SECOND EXTRACTION COLUMN AND RECOVERING FROM THE SECOND SOLUMN A SECONDARY RAFFINATE AND A SECONDARY EXTRACT, PASSING THE SECONDARY EXTRACT TO A SETTLING-OUT VESSEL AND RECOVERING FROM THE SETTLING OUT VESSEL A PSEUDO-RAFFINATE PHASE AND A SOLVENT PHASE, RECYCLING THE SOLVENT PHASE TO THE FIRST EXTRACTION COLUMN, TREATING THE PRIMARY EXTRACT TO SEPARATE SOLVENT THEREFROM AND RECYCLING THIS SOLVENT TO THE SECOND EXTRACTION COLUMN, TREATING THE PSEUDO-RAFFINATE AND THE SECONDARY RAFFINATE TO RECOVER SOLVENT THEREFROM, AND COMBINING THIS SOLVENT WITH THE SOLVENT RECOVERED FROM THE PRIMARY EXTRACT.
Claim 2
Dependent Claim
129 words
A PROCESS FOR SOLVENT EXTRACTING A HYDROCARBON FEEDSTOCK COMPRISING CONTACTING THE FEEDSTOCK COUNTER-CURRENTLY WITH SOLVENT IN A FIRST EXTRACTION COLUMN AND RECOVERING FROM THE FIRST COLUMN A PRIMARY RAFFINATE AND A PRIMARY EXTRACT, CONTACTING THE PRIMARY RAFFINATE COUNTER-CURRENTLY WITH SOLVENT IN A SECOND EXTRACTION COLUMN AND RECOVERING FROM THE SECOND SOLUMN A SECONDARY RAFFINATE AND A SECONDARY EXTRACT, PASSING THE SECONDARY EXTRACT TO A SETTLING-OUT VESSEL AND RECOVERING FROM THE SETTLING OUT VESSEL A PSEUDO-RAFFINATE PHASE AND A SOLVENT PHASE, RECYCLING THE SOLVENT PHASE TO THE FIRST EXTRACTION COLUMN, TREATING THE PRIMARY EXTRACT TO SEPARATE SOLVENT THEREFROM AND RECYCLING THIS SOLVENT TO THE SECOND EXTRACTION COLUMN, TREATING THE PSEUDO-RAFFINATE AND THE SECONDARY RAFFINATE TO RECOVER SOLVENT THEREFROM, AND COMBINING THIS SOLVENT WITH THE SOLVENT RECOVERED FROM THE PRIMARY EXTRACT.
References Cited (Backward Citations)
US2070385A
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US2116540A
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US2346639A
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US2754249A
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US2911361A
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US2953501A
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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) | 1968-09-06 | 1969-03-08 | 1969-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-06 | 1973-03-08 | 1973-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-06 | 1977-03-08 | 1977-09-07 | $7700.00 | Window Closed / Lapsed |