IP Library › Granted Patent US 12,274,982
Granted Patent B2
US 12,274,982 · App. 17/971,124 · Granted Apr 15, 2025

Electrodialysis systems with decreased concentration gradients at high recovery rates

Inventors: Xin Li (Houston, TX); Ethan Demeter (The Woodlands, TX)
Assignee: TexOPCO, LLC
B01D61/463B01D61/58C02F1/4693B01D2311/2512B01D2317/022C02F2101/10C02F2101/103C02F2101/12C02F2101/14C02F2101/20C02F2301/046C02F2301/08
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Quick Facts
Patent No.
US 12,274,982
App. No.
17/971,124
Granted
Apr 15, 2025
Kind
B2
Abstract

Provided are electrodialysis systems comprising a plurality of electrodialysis devices, wherein each electrodialysis device of the plurality of electrodialysis devices has a product inlet stream, a product outlet stream, a brine inlet stream, and a brine outlet stream. The product inlet stream for a first electrodialysis device comprises the brine outlet stream of a second electrodialysis device. Further, a first portion of a feed stream is the brine inlet stream for the first electrodialysis device and a second portion of the feed stream is the brine inlet stream for the second electrodialysis device or a third electrodialysis device.

Claims (28)

1. An electrodialysis system comprising: a feed stream; and

a first electrodialysis device comprising a product inlet stream, a product outlet stream, a brine inlet stream, and a brine outlet stream; and

a second electrodialysis device downstream of the first electrodialysis device, wherein the second electrodialysis device comprises a product inlet stream, a product outlet stream, a brine inlet stream, and a brine outlet stream,

wherein the brine inlet stream of the second electrodialysis device comprises the feed stream and wherein the product inlet stream for the first electrodialysis device comprises the brine outlet stream of the second electrodialysis device.

2. The system of claim 1 , wherein a third electrodialysis device comprises a brine inlet stream comprising the feed stream, wherein the third electrodialysis device is located between the first electrodialysis device and the second electrodialysis device and comprises a product inlet stream, a product outlet stream, a brine inlet stream, and a brine outlet stream.

3. The system of claim 2 , wherein the brine inlet stream of the second electrodialysis device comprises the brine outlet stream of the third electrodialysis device.

4. The system of claim 2 , wherein the product inlet stream of the third electrodialysis device comprises the product outlet stream of the first electrodialysis device.

5. The system of claim 2 , wherein the product inlet stream for the first electrodialysis device comprises the brine outlet stream of the second electrodialysis device and the brine outlet stream of the third electrodialysis device.

6. The system of claim 1 , wherein the brine inlet stream of the first electrodialysis device comprises an outlet stream of a brine tank, and an inlet stream of a brine tank comprises the brine outlet stream of the first electrodialysis device.

7. The system of claim 1 , wherein the product inlet stream of the second electrodialysis device comprises the product outlet stream of the first electrodialysis device.

8. The system of claim 1 , wherein a first portion of the feed stream is the brine inlet stream for the second electrodialysis device and a second portion of the feed stream is the brine inlet stream for a third electrodialysis device.

9. The system of claim 1 , wherein an ionic concentration of the brine outlet stream of the second electrodialysis device is greater than an ionic concentration of the feed stream.

10. The system of claim 1 , wherein an ionic concentration of the product inlet stream of the first electrodialysis device is greater than an ionic concentration of the feed stream.

11. The system of claim 1 , wherein an ionic concentration of the brine inlet stream of the second electrodialysis device is less than 10 times an ionic concentration of the product inlet stream of the second electrodialysis device.

12. The system of claim 1 , wherein the electrodialysis system is configured to remove at least one of arsenic ions, fluoride ions, perchlorate ions, lithium ions, gold ions, or silver ions.

13. A method of purifying water comprising:

routing a feed stream to a second electrodialysis device downstream of a first electrodialysis device, wherein each of the first electrodialysis device and the second electrodialysis device comprise a product inlet stream, a product outlet stream, a brine inlet stream, and a brine outlet stream, wherein the brine inlet stream of the second electrodialysis device comprises the feed stream and wherein the product inlet stream for the first electrodialysis device comprises the brine outlet stream of the second electrodialysis device.

14. The method of claim 13 , comprising:

routing a brine inlet stream of a third electrodialysis device, wherein the third electrodialysis device is positioned between the first electrodialysis device and the second electrodialysis device and wherein the third electrodialysis device comprises a product inlet stream, a product outlet stream, a brine inlet stream, and a brine outlet stream, and wherein the brine inlet stream of the third electrodialysis device comprises the feed stream.

15. The method of claim 14 , wherein a brine inlet stream of the second electrodialysis device comprises a brine outlet stream of the third electrodialysis device.

16. The method of claim 14 , comprising routing a product inlet stream of the third electrodialysis device, wherein the product inlet stream of the third electrodialysis device comprises a product outlet stream of the first electrodialysis device.

17. The method of claim 13 , comprising routing a brine inlet stream of the first electrodialysis device, wherein the brine inlet stream of the first electrodialysis device comprises a brine outlet stream of a brine tank, and a brine inlet stream of the brine tank comprises a brine outlet of the first electrodialysis device.

18. The method of claim 13 , comprising routing a product inlet stream of the second electrodialysis device, wherein the product inlet stream of the second electrodialysis device comprises a product outlet stream of the first electrodialysis device.

19. The method of claim 13 , comprising routing a first portion of the feed stream and a second portion of the feed stream, wherein the first portion of the feed stream is a brine inlet stream for the second electrodialysis device, and the second portion of the feed stream is a brine inlet for a third electrodialysis device.

20. The method of claim 19 , wherein the product inlet stream for the first electrodialysis device comprises the brine outlet stream of the second electrodialysis device and a brine outlet stream of the third electrodialysis device.

21. The method of claim 13 , wherein an ionic concentration of the brine outlet stream of the second electrodialysis device is greater than an ionic concentration of the feed stream.

22. The method of claim 13 , wherein an ionic concentration of a brine inlet stream of the second electrodialysis device is less than 10 times an ionic concentration of a product inlet stream of the second electrodialysis device.

23. The method of claim 13 , wherein the method of purifying water is configured to remove at least one of arsenic ions, fluoride ions, perchlorate ions, lithium ions, gold ions, or silver ions.

Assignments (5)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 31, 2025
From: MIS IP HOLDINGS, LLC
To: TEXOPCO, LLC
Reel/Frame 070072/0150 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Aug 27, 2024
From: MAGNA IMPERIO SYSTEMS CORPORATION
To: TEXOPCO LLC
Reel/Frame 068411/0863 →
SECURITY INTEREST Recorded Oct 31, 2023
From: MIS IP HOLDINGS, LLC
To: ACP POST OAK CREDIT I LLC
Reel/Frame 065408/0340 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 14, 2023
From: LI, XIN; DEMETER, ETHAN
To: MAGNA IMPERIO SYSTEMS CORP.
Reel/Frame 064903/0076 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 14, 2023
From: MAGNA IMPERIO SYSTEMS CORP.
To: MIS IP HOLDINGS, LLC
Reel/Frame 064903/0181 →
Continuity (3)
Continuation 16844787 · Apr 9, 2020
Provisional Application 62831508 · Apr 9, 2019
Related Publication 20230054712A1 · Feb 23, 2023
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