# US 7,955,481 B2 · Internal flow control in electrolytic cells

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- Number: US 7,955,481 B2
- Document ID: US7955481B2
- Status: Granted
- Kind: B2
- Application number: 11/963,392
- Filed: 2007-12-21
- Published: 2008-07-10
- Granted: 2011-06-07
- Earliest claimed: 2006-12-23
- Assignees: MIOX Corporation
- Inventors: Justin Sanchez; Rodney E. Herrington
- Web page: https://patentgrep.com/patent/US7955481B2

## CPC

- C25B 15/02: Process control or regulation
- C02F 1/46104: {Devices therefor; Their operating or servicing}
- C25B 9/17: Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof
- C02F 2201/46145: Fluid flow
- C02F 2201/4618: Supplying or removing reactants or electrolyte
- C25B: ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR (anodic or cathodic protection C23F13/00; single-crystal growth C30B)
- C02F: TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE (separation in general B01D; special arrangements on waterborne vessels of installations for treating water, waste water or sewage, e.g. for producing fresh water, B63J; adding materials to water to prevent corrosion C23F; treating radioactively-contaminated liquids G21F9/04; regeneration of reactants for recirculation into processes, see the relevant places for the processes)

## Abstract

Method and apparatus for controlling two phase flow in electrolytic cells. The present invention is directed to any electrolytic cell, including but not limited to upflow electrolytic cells that comprise parallel electrodes in a vertical orientation. Fluid control strips are preferably added between the anode and cathode electrodes to control flow of fluid and gas bubbles generated between the electrodes in order to avoid the detrimental effects of gas bubbles on the conductivity of the fluid solution, and thereby increase production and operational efficiency of the electrolytic cell.

## Claims

### Claim 1

An electrolytic cell comprising:
an anode;
a cathode;
an inlet and an outlet defining a general flow direction of solution in said electrolytic cell, said general flow direction substantially parallel to a planar orientation of said anode and said cathode; and
a first separator disposed between the anode and cathode, said first separator oriented substantially transversely to said general flow direction and said planar orientation;
wherein said first separator enhances separation of the liquid solution and gas produced by electrolysis of the solution.

### Claim 2 (depends on 1)

The electrolytic cell of claim 1 further comprising a gas collection chamber extending approximately from said first separator to a top of said electrolytic cell.

### Claim 3 (depends on 2)

The electrolytic cell of claim 2 further comprising a second separator located downstream of and parallel to said first separator, said second separator comprising a vertical wall adjacent to said gas collection chamber.

### Claim 4 (depends on 3)

The electrolytic cell of claim 3 further comprising a second gas collection chamber extending from said second separator to said top of said electrolytic cell.

### Claim 5 (depends on 2)

The electrolytic cell of claim 2 wherein said first separator comprises a gas separation block partially extending into said gas collection chamber.

### Claim 6 (depends on 2)

The electrolytic cell of claim 2 further comprising an exit chamber.

### Claim 7 (depends on 6)

The electrolytic cell of claim 6 further comprising one or more short circuit prevention blocks partially extending into said exit chamber.

### Claim 8 (depends on 7)

The electrolytic cell of claim 7 wherein a solution level in said exit chamber is lower than a height of said one or more short circuit prevention blocks.

### Claim 9 (depends on 1)

The electrolytic cell of claim 1 further comprising an inlet manifold for providing even flow of solution into said electrolytic cell across approximately an entire width of said electrolytic cell.

### Claim 10 (depends on 1)

The electrolytic cell of claim 1 wherein said first separator comprises one or more materials selected from the group consisting of a non-corrosive material, Teflon®, Viton®Neoprene®, and rubber.

### Claim 11 (depends on 1)

The electrolytic cell of claim 1 wherein said first separator comprises both a flexible material and a rigid material.

### Claim 12 (depends on 1)

The electrolytic cell of claim 1 wherein said first separator partially defines separate electrolysis chambers within said electrolytic cell, each chamber comprising an inlet port and an exit port defining a flow direction within said chamber which is at an angle or transverse to said general flow direction.

### Claim 13 (depends on 1)

The electrolytic cell of claim 1 wherein said electrolytic cell is an up-flow cell and said anode and said cathode have a vertical planar orientation.

### Claim 14

A method for enhancing electrolysis efficiency, the method comprising the steps of:
flowing solution in an electrolytic cell comprising electrodes in a general flow direction substantially parallel to a planar orientation of the electrodes;
interrupting a flow of the solution with a separator oriented substantially perpendicular to the general flow direction;
causing the solution to flow at an angle or transverse to the general flow direction;
electrolyzing the solution, thereby forming one or more oxidants and a gas;
separating the gas from the solution, thereby decreasing the gas concentration in the solution; and
collecting the gas near an outlet port of the electrolytic cell while the solution continues to flow in the electrolytic cell.

### Claim 15 (depends on 14)

The method of claim 14 further comprising increasing a concentration of the oxidants in the solution.

### Claim 16 (depends on 14)

The method of claim 14 further comprising limiting an area in which the gas and the solution flow in the general flow direction to only a portion of the width of the electrolytic cell.

### Claim 17 (depends on 14)

The method of claim 14 wherein the separating step comprises accumulating the gas under the separator.

### Claim 18 (depends on 14)

The method of claim 14 wherein the separating step comprises increasing electrical conductivity of the solution.

### Claim 19 (depends on 14)

The method of claim 14 further comprising the step of providing an even flow of solution entering the electrolytic cell across approximately the entire width of the electrolytic cell.

### Claim 20 (depends on 14)

The method of claim 14 further comprising the step of providing one or more blocks extending above electrodes in the electrolytic cell to prevent electrolyzed solution back between the electrodes.

### Claim 21 (depends on 20)

The method of claim 20 further comprising the step of adjusting the height of the outlet port over a level of solution so that the solution level is lower than a height of the blocks.

### Claim 22 (depends on 20)

The method of claim 20 wherein the collecting step comprises flowing the separated gas over the blocks to the outlet port.

### Claim 23 (depends on 14)

The method of claim 14 further comprising the step of providing separate electrolysis chambers.

### Claim 24 (depends on 23)

The method of claim 23 further comprising the step of the separators preventing some of the separated gas generated in a first electrolysis chamber from flowing into a second electrolysis chamber.

### Claim 25 (depends on 14)

The method of claim 14 wherein the electrolytic cell is an up-flow cell and the electrodes have a vertical planar orientation.