US4086163A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal extraction by combined solvent and LM extraction
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1976-09-29
•
Granted: 1978-04-25
•
Expires: 1996-09-29
Abstract
Abstract A process for removing a dissolved component from a feedstream. The feedstream is contacted with a liquid membrane emulsion which removes a portion of the dissolved component. After separation of the emulsion from the feedstream, a substantial portion of the remaining dissolved component is removed by solvent extraction.
Inventors
- 👤 Robert P. Cahn
- 👤 Norman N. Li
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:23
CPC Classifications
B; B01; B01D; B01D11/00; B01D11/04; B01D11/0488; B01D11/0415; B01D61/00; B01D61/38; B01D61/40; C; C22; C22B; C22B15/00; C22B15/0063; C22B15/0084; C22B15/0089; Y; Y02; Y02P; Y02P10/00; Y02P10/20; Y10; Y10S; Y10S423/00; Y10S423/09; Y10S423/14
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
153 words
A process for removing a dissolved component from an aqueous feedstream comprising: (a) contacting said feedstream with an emulsion having a continuous phase immiscible with the feedstream and permeable to said dissolved component, and a dispersed phase, for a period of time and at conditions sufficient for said emulsion to absorb a portion of said dissolved component ranging from 20 to 90 weight %; (b) removing at least part of said emulsion from said feedstream which emulsion contains said portion of said dissolved component; (c) demulsifying at least a portion of said removed emulsion into the continuous and dispersed phases; (d) contacting the feedstream resultant from step (b) with a solvent immiscible with said feedstream and permeable to said dissolved component, said solvent comprising at least part of the continuous phase resultant from the demulsification step (c), whereby said solvent has a capacity to absorb a major amount of the remaining dissolved component.
Claim 2
Dependent Claim
153 words
A process for removing a dissolved component from an aqueous feedstream comprising: (a) contacting said feedstream with an emulsion having a continuous phase immiscible with the feedstream and permeable to said dissolved component, and a dispersed phase, for a period of time and at conditions sufficient for said emulsion to absorb a portion of said dissolved component ranging from 20 to 90 weight %; (b) removing at least part of said emulsion from said feedstream which emulsion contains said portion of said dissolved component; (c) demulsifying at least a portion of said removed emulsion into the continuous and dispersed phases; (d) contacting the feedstream resultant from step (b) with a solvent immiscible with said feedstream and permeable to said dissolved component, said solvent comprising at least part of the continuous phase resultant from the demulsification step (c), whereby said solvent has a capacity to absorb a major amount of the remaining dissolved component.
Claim 3
Dependent Claim
22 words
The process of claim 1 wherein said dispersed phase includes a reagent capable of converting said dissolved component to a nonpermeable form.
Claim 4
Dependent Claim
68 words
The process of claim 1 in which said continuous phase contains a first reagent, said first reagent capable of forming a first complex with said dissolved component, and said dispersed phase contains a second reagent, said second reagent being capable of converting said first complex to a second complex by replacing said dissolved component in said first complex such that said dissolved component remains in said dispersed phase.
Claim 5
Dependent Claim
16 words
The process of claim 3 in which said dissolved component is the ion of a metal.
Claim 6
Dependent Claim
11 words
The process of claim 4 in which said metal is copper.
Claim 7
Dependent Claim
21 words
The process of claim 1 in which said absorbed portion is between 50 and 80 weight % of said dissolved component.
Claim 8
Dependent Claim
15 words
The process of claim 1 in which the step of separating is performed by settling.
Claim 9
Dependent Claim
20 words
The process of claim 1 in which said contacting said resultant feedstream with a solvent is performed by solvent extraction.
Claim 10
Dependent Claim
14 words
The process of claim 8 in which said solvent extraction is performed by countercurrency.
Claim 11
Dependent Claim
18 words
The process of claim 1 in which said major amount is greater than one-half the remaining dissolved component.
Claim 12
Dependent Claim
17 words
The process of claim 1 in which said solvent is the same material as said continuous phase.
Claim 13
Dependent Claim
42 words
The process of claim 1 further comprising the steps of: (a) separating said solvent from said resultant feed stream and (b) reforming an emulsion in which the continuous phase includes said solvent and said emulsion is useable in the emulsion extraction step.
Claim 14
Dependent Claim
27 words
The process of claim 1 further comprising the step of separating said dissolved component from said dispersed phase, said dispersed phase being reused to form said emulsion.
Claim 15
Dependent Claim
27 words
The process according to claim 1 wherein said solvent of step (d) comprises at least a part of the dispersed phase of the emulsion of step (a).
Claim 16
Dependent Claim
31 words
The process of claim 14 wherein the dispersed phase contained in the solvent of step (d) is less than 15% of the dispersed phase contained in the emulsion of step (a).
Claim 17
Dependent Claim
29 words
The process of claim 1 wherein the major portion of said solvent in step (d) comprises at least part of the continuous phase resultant from the demulsification step (c).
References Cited (Backward Citations)
US3617546A
Cited
US4010099A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-04-24 | 1981-10-24 | 1982-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-24 | 1985-10-24 | 1986-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-24 | 1989-10-24 | 1990-04-25 | $7700.00 | Window Closed / Lapsed |