Separating Components Of Aqueous Mixtures, Suspensions, and Solutions

Abstract

Systems and methods are described for separating components of aqueous mixtures, including aqueous solutions and suspensions. In one implementation, an apparatus flows the aqueous mixture over a hydrophilic surface to form a first region of purified water and a second region of at least one concentrated non-aqueous component. The apparatus can draw off either the purified water or the concentrated non-aqueous components. In one implementation, an array of tubules performs the differential extraction. In another implementation, various hydrophilic and/or hydrophobic surfaces are disposed in multiple differential extractors and some effluents may be recycled to perform complex assaying and separation.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a diagram of an exemplary differential extractor for separating components of aqueous mixtures.

FIG. 2 is a diagram of exemplary dimensions of one implementation of the differential extractor of FIG. 1.

FIG. 3 is a diagram of an exemplary system for separating components of aqueous mixtures.

FIG. 4 is a diagram of concentration gradients achieved by an exemplary system.

FIG. 5 is a diagram of swelling of an exemplary material used in a differential extractor.

FIG. 6 is a diagram of exemplary solute exclusion.

FIG. 7 is a diagram of growth of an exemplary exclusion zone over time.

FIG. 8 is a diagram of exemplary separation of a protein from an aqueous mixture.

FIG. 9 is a diagram of exemplary separation of a dye from an aqueous mixture.

FIG. 10 is a diagram of an exemplary interface between a gel exclusion surface and a collector.

FIG. 11 is a diagram of an exemplary exclusion zone over time and at different distances along an exclusion surface.

FIG. 12 is a diagram of an exemplary extraction apparatus to interface with a gel exclusion channel.

FIG. 13 is a diagram of an exemplary array of differential extractors.

FIG. 14 is a flow diagram of an exemplary method of separating components of aqueous mixtures.

Claims

1. A method, comprising: flowing an aqueous mixture over a hydrophilic surface;establishing a first region of purified water in the aqueous mixture; andestablishing a second region of one or more concentrated non-aqueous components in the aqueous mixture.

2. The method as recited in claim 1, wherein the one or more concentrated non-aqueous components include one of a solute, a suspension, a colloid, an ionic compound, a pathogen, a bacteria, or a virus.

3. The method as recited in claim 1, wherein one of the concentrated non-aqueous components comprises a species selected from the group of species consisting of a salt, an ion, a dye, a particle, a contaminant, a pathogen, a bacteria, a virus, a red blood cell, a blood component, a wastewater component, a mineral, deuterium, a soluble organic compound, a soluble inorganic compound, an insoluble organic compound, an insoluble inorganic compound, and an element. (Whatever we don't list here is automatically covered by claims 1 or 2 through the “doctrine of claim differentiation.”)

4. The method as recited in claim 1, wherein one of the concentrated non-aqueous components comprises a liquid miscible in water.

5. The method as recited in claim 1, wherein the hydrophilic surface comprises a gel or a polymer.

6. The method as recited in claim 1, wherein the hydrophilic surface comprises NAFION.

7. The method as recited in claim 1, further comprising collecting purified water from the first region and/or collecting at least one of the concentrated non-aqueous components from the second region.

8. The method as recited 1, further comprising identifying or measuring a concentration of one of the concentrated non-aqueous components in the second region.

9. The method as recited in claim 1, further comprising applying a voltage between the hydrophilic surface and a second surface, wherein the second surface attracts a non-aqueous component of the mixture.

10. The method as recited in claim 9, wherein a negative polarity of the voltage is applied to the hydrophilic surface to attract water molecules.

11. The method as recited in claim 1, wherein the hydrophilic surface comprises one or more tubes.

12. The method as recited in claim 11, further comprising disposing one or more collecting means on a radial axis of each of the one or more tubes to collect the one or more concentrated non-aqueous components.

13. The method as recited in claim 11, further comprising disposing one or more collecting means in an annular ring having a radius from the radial axis of each of the one or more tubes to collect purified water.

14. The method as recited in claim 1, further comprising repeating the method using different hydrophilic surfaces to separate different components of the aqueous mixture.

15. The method as recited in claim 1, further comprising recycling the purified water or the one or more concentrated non-aqueous components over the hydrophilic surface.

16. An apparatus, comprising: a vessel for enabling a flow of an aqueous mixture; anda hydrophilic surface associated with the vessel for creating a first region and a second region in the flow of the aqueous mixture;wherein the first region comprises a part of the aqueous mixture that has a decreased concentration of a non-aqueous component compared with the initial aqueous mixture; andwherein the second region comprises a part of the aqueous mixture that has an increased concentration of a non-aqueous component compared with the initial aqueous mixture.

17. The apparatus as recited in claim 16, further comprising a first collector disposed in the vessel for removing purified water from the first region.

18. The apparatus as recited in claim 16, further comprising a second collector disposed in the vessel for removing at least one concentrated non-aqueous component from the second region.

19. The apparatus as recited in claim 16, further comprising an array including multiple instances of the vessel.

20. A system, comprising: means for flowing an aqueous mixture over a hydrophilic surface;means for establishing a first region of purified water in the aqueous mixture; andmeans for establishing a second region of a concentrated non-aqueous component in the aqueous mixture.