US3923651A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for liquid/liquid extraction
Assignee: Commonwealth Scientific and Industrial Research Organisation
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Filing: 1974-11-20
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Granted: 1975-12-02
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Expires: 1994-11-20
Abstract
Abstract A method of phase separation using ferromagnetic materials. A mixture of phases is treated with particles or granules of ferromagnetic material so that one of the phases is preferentially absorbed or collected onto or into the particles or granules. The particles or granules of the ferromagnetic material together with the absorbed or collected phase may then be recovered from the remainder of the mixture using magnetic means.
Inventors
- 👤 Donald Eric Weiss
- 👤 Hendrik Adriaan Jacob Battaerd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:46
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/68; C02F1/681; B; B01; B01D; B01D11/00; B01D11/04; B01D11/0492; B01D15/00; B01D17/00; B01D17/02; B01D17/0202; B01D17/04; B01D35/00; B01D35/06; B01D37/00; B01D37/02; B01J; B01J20/00; B01J47/00; B01J47/02; B01J47/06; B01J49/00; B01J49/40; B01J49/45; B03; B03B; B03B1/00; B03B1/04; B03C; B03C1/00; B03C1/005; B03C1/01; C22; C22B; C22B3/00; C22B3/20; C22B3/22; C22B3/24; B03C2201/00; B03C2201/18; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
67 words
IN THE PROCESS OF LIQUID/LIQUID EXTRACTION COMPRISING EXTRACTING A COMPOUND FROM A SOLUTION OF THE COMPOUND IN AN AQUEOUS LIQUID MEDIUM WITH A SECOND ORGANIC LIQUID MEDIUM IMMISCIBLE WITH THE FIRST LIQUID MEDIUM, THE IMPROVEMMENT CONSISTING OF SEPARATING THE TWO LIQUID PHASES BY FIRSTLY ADDING SYNTHETIC FERROMAGNITIC POLYMERIC PARTICLES BEING CHARACTERISED IN THAT SAID FERROMAGNETIC PARTILCES PERFERNTIALLY ABSORB OR ADSORB THE SECOND LIQUID MEDIUM; AND SECONDLY REMOVING
Claim 2
Dependent Claim
67 words
IN THE PROCESS OF LIQUID/LIQUID EXTRACTION COMPRISING EXTRACTING A COMPOUND FROM A SOLUTION OF THE COMPOUND IN AN AQUEOUS LIQUID MEDIUM WITH A SECOND ORGANIC LIQUID MEDIUM IMMISCIBLE WITH THE FIRST LIQUID MEDIUM, THE IMPROVEMMENT CONSISTING OF SEPARATING THE TWO LIQUID PHASES BY FIRSTLY ADDING SYNTHETIC FERROMAGNITIC POLYMERIC PARTICLES BEING CHARACTERISED IN THAT SAID FERROMAGNETIC PARTILCES PERFERNTIALLY ABSORB OR ADSORB THE SECOND LIQUID MEDIUM; AND SECONDLY REMOVING
Claim 3
Dependent Claim
29 words
A process according to claim 1 wherein a complexing agent for the compound to be extracted is added to one or both of said liquid media prior to extraction.
Claim 4
Dependent Claim
21 words
A process according to claim 1 wherein the second liquid medium is a complexing agent for the compound to be extracted.
Claim 5
Dependent Claim
20 words
A process according to claim 1 wherein the second liquid medium is less than 10% w/w of the total composition.
Claim 6
Dependent Claim
27 words
A process according to claim 1 wherein the synthetic ferromagnetic polymer comprises a ferromagnetic particle incorporated wholly or partially within polystyrene or copolymers of styrene and polyesters.
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) | 1978-12-01 | 1979-06-02 | 1979-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-01 | 1983-06-02 | 1983-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-01 | 1987-06-02 | 1987-12-02 | $7700.00 | Window Closed / Lapsed |