# US 2025/0154670 A1 · Sealed electrolysis cell

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- Number: US 2025/0154670 A1
- Document ID: US20250154670A1
- Status: Published application
- Kind: A1
- Application number: 18/723,023
- Filed: 2022-12-21
- Published: 2025-05-15
- Earliest claimed: 2021-12-23
- Assignees: thyssenkrupp nucera AG & Co. KGaA
- Applicants: thyssenkrupp nucera AG & Co. KGaA
- Inventors: Emre AYRAK; Peter TOROS; Stefan KLINK; Jonas BRINKMANN
- Web page: https://patentgrep.com/patent/US20250154670A1

## CPC

- C25B 1/04: by electrolysis of water
- C25B 9/77: having diaphragms
- C25B 1/26: Chlorine; Compounds thereof (by simultaneous production of alkali metal hydroxides and chlorine, oxyacids or salts of chlorine C25B1/34)
- C25B 9/19: with diaphragms
- C25B 9/63: Holders for electrodes; Positioning of the electrodes
- C25B 13/02: characterised by shape or form
- 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)

## Abstract

An electrolysis cell comprises two elements, each comprising a central portion defining an anode chamber and a cathode chamber, respectively, and a circumferential flange portion, a sheet-like separator with a circumferential edge, the separator being disposed between the two elements and separating the anode and cathode chambers, and a sealing arrangement comprising at least a first and a second gasket, wherein the sealing arrangement is disposed in a gap between the flange portions, wherein the first gasket is an inner gasket positioned in a portion of the gap adjacent to the chambers and the second gasket is an outer gasket positioned in a portion of the gap distant to the chambers, wherein the gaskets are spaced apart from each other in the gap at an interval, and wherein the circumferential edge of the separator is located radially between a midpoint of the first gasket and a midpoint of the second gasket.

## Claims

### Claim at position 1

1-11. (canceled)

### Claim 12

An electrolysis cell, comprising:
a first element including a first circumferential flange portion and a first central portion delimiting an anode chamber;
a second element including a second circumferential flange portion and a second central portion delimiting a cathode chamber;
an anode accommodated in the anode chamber;
a cathode accommodated in the cathode chamber;
a sheet-like separator having a circumferential edge, the separator disposed between the first and second elements and separating the anode and cathode chambers; and
a sealing arrangement including a first gasket and a second gasket, wherein the sealing arrangement is disposed in a gap between the first and second circumferential flange portions for fastening the separator and for sealing the anode chamber and the cathode chamber;
wherein the first gasket is an inner gasket positioned in a portion of the gap adjacent to the chambers and the second gasket is an outer gasket positioned in a portion of the gap distant to the chambers;
wherein the gaskets are spaced apart from each other in the gap at an interval and the separator is fastened in the cell by the first gasket, and wherein the circumferential edge of the separator is located radially between a midpoint of the first gasket and a midpoint of the second gasket;
wherein the sealing arrangement further includes an electrically isolating layer disposed in the gap such that a first side of the layer is in contact with the first gasket and a second, opposite side of the layer is in contact with the second gasket.

### Claim 13 (depends on 12)

The electrolysis cell according to claim 12, wherein the edge of the separator is located in the interval between the first gasket and the second gasket.

### Claim 14 (depends on 12)

The electrolysis cell according to claim 12, wherein the separator is a porous diaphragm.

### Claim 15 (depends on 12)

The electrolysis cell according to claim 12, wherein the sealing arrangement includes exactly two gaskets.

### Claim 16 (depends on 12)

The electrolysis cell according to claim 12, wherein the interval is in the range of 1 mm to 20 mm.

### Claim 17 (depends on 12)

The electrolysis cell according to claim 12, wherein the interval is in the range of 0.5 to 1.5 times the smallest width of the gaskets.

### Claim 18 (depends on 12)

The electrolysis cell according to claim 12, wherein the gaskets are compressed within the gap by a screwed connection of the flange portions.

### Claim 19 (depends on 18)

The electrolysis cell according to claim 18, wherein the screwed connection includes at least two beams compressing the flange portions from both sides and bolts connecting the beams, which bolts are positioned on the outer side of the second gasket.

### Claim 20 (depends on 12)

The electrolysis cell according to claim 12, wherein the central portions are pan-shaped half-shells and the electrolysis cell is of single element design.

### Claim 21 (depends on 12)

The electrolysis cell according to claim 12, wherein the central portions form a bipolar wall and flange portions are provided by a solid frame, such that the elements are configured to be stacked according to a filter-press design.