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EP0172495A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

A multi-cell electrolyzer

Assignee: Asahi Kasei Corp
•
Filing: 1985-08-07
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Granted: —
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Expires: 2005-08-07
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Abstract

Abstract A multi-cell etectroyzer comprising a plurality or unit cells, each of which is composed of an anode chamber containing an anode and a cathode chamber containing a cathode and a cation exchange membrane for partitioning said unit cell into said anode chamber and said cathode chamber and each of which is adapted to have an internal pressure maintained at a level higher than the atmospheric pressure in operation of the electrolyzer, said plurality of unit cells being arranged in series and adapted to be energized through a plurality of current lead plates, and rigid multi-contact electrically conductive means provided between the adjacent unit cells and/or between each current lead plate and the unit cell adjacent thereto, thereby establishing electrical connection between the adjacent unit cells and/or between each current lead plate and the unit cell adjacent thereto. With such a structure, not only the electrical contact resistance between the adjacent unit cells and between each current lead plate and the unit cell adjacent thereto is extremely reduced, but also the current density in the unit cells is rendered uniform. Further, the present multi-cell electrolyzer can be easily constructed either in a bipolar form or in a monopoler form using unit cells common to both of the bipolar and monopolar forms.

Inventors

  • 👤 Maomi Seko
  • 👤 Reiji Takemura
  • 👤 Hideharu Miyamori

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-25 12:11
CPC Classifications
C; C25; C25B; C25B9/00; C25B9/60; C25B9/65; C25B9/66; C25B9/70; C25B9/73; C25B9/75; C25B9/77

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 229 words
A multi-cell electrolyzer comprising: a plurality of unit cells; each unit cell comprising an anode chamber unit and a cathode chamber unit; said anode chamber unit comprising a frame wall, a metallic side wall cooperating with said frame wall to make a pan form, and an anode welded with said side wall through a plurality of electrically conductive ribs; said cathode chamber unit comprising a frame wall, a metallic side wall cooperating with said frame wall to make a pan form, and a cathode welded with said side wall through a plurality of electrically conductive ribs; a cation exchange membrane disposed between the anode of the anode chamber unit and the cathode of the cathode chamber unit adjacent to said anode chamber unit so that said anode and said cathode face said cation exchange membrane on its opposite sides, respectively; said plurality of unit cells being arranged in series and adapted to be energized through a plurality of current lead plates; and rigid multi-contact electrically conductive means; said rigid multi-contact electrically conductive means being provided between the adjacent unit cells and/or between each current lead plate and the unit cell adjacent thereto, thereby establishing rigid firm contact therebetween at a plurality of points; and wherein the electrolyzer is adapted to be operated while maintaining the internal pressure of each unit cell at a level higher than the atmospheric pressure.
Claim 2
Dependent Claim 229 words
A multi-cell electrolyzer comprising: a plurality of unit cells; each unit cell comprising an anode chamber unit and a cathode chamber unit; said anode chamber unit comprising a frame wall, a metallic side wall cooperating with said frame wall to make a pan form, and an anode welded with said side wall through a plurality of electrically conductive ribs; said cathode chamber unit comprising a frame wall, a metallic side wall cooperating with said frame wall to make a pan form, and a cathode welded with said side wall through a plurality of electrically conductive ribs; a cation exchange membrane disposed between the anode of the anode chamber unit and the cathode of the cathode chamber unit adjacent to said anode chamber unit so that said anode and said cathode face said cation exchange membrane on its opposite sides, respectively; said plurality of unit cells being arranged in series and adapted to be energized through a plurality of current lead plates; and rigid multi-contact electrically conductive means; said rigid multi-contact electrically conductive means being provided between the adjacent unit cells and/or between each current lead plate and the unit cell adjacent thereto, thereby establishing rigid firm contact therebetween at a plurality of points; and wherein the electrolyzer is adapted to be operated while maintaining the internal pressure of each unit cell at a level higher than the atmospheric pressure.
Claim 3
Dependent Claim 36 words
An electrolyzer according to claim 1, wherein said rigid multi-contact electrically conductive means is constituted by a plurality of protrusions formed on the surface of at least one of the side walls of the unit cell.
Claim 4
Dependent Claim 48 words
An electrolyzer according to claim 1, wherein said rigid multi-contact electrically conductive means is in the form of a rigid electrically conductive sheet having a plurality of protrusions and is held between the adjacent unit cells and/or between each current lead plate and the unit cell adjacent thereto.
Claim 5
Dependent Claim 28 words
An electrolyzer according to claim 3, wherein said rigid electrically conductive sheet having a plurality of protrusions is in the form of a burring or an expanded metal.
Claim 6
Dependent Claim 31 words
An electrolyzer according to any one of claims 1 to 4, wherein the internal pressure of each unit cell is maintained at a pressure of 0.2 to 3 kg/cm 2 G.

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