| CPC C25B 9/23 (2021.01) [C25B 1/04 (2013.01); C25B 9/05 (2021.01); C25B 9/73 (2021.01); C25B 9/77 (2021.01); C25B 13/02 (2013.01)] | 10 Claims |
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1. An electrolysis vessel comprising:
a plurality of electroconductive separating wall each having a first face and a second face, wherein each adjacent pair of the electroconductive separating walls comprising a first electroconductive separating wall and a second electroconductive separating wall is arranged such that the first face of the first electroconductive separating wall faces the second face of the second electroconductive separating wall;
a plurality of separating membrane-gasket-protecting member assembly each arranged between each adjacent pair of the electroconductive separating walls; and
sealing members each arranged between each adjacent pair of the electroconductive separating wall and the separating membrane-gasket-protecting member assembly,
the separating membrane-gasket-protecting member assembly comprising:
an ion-permeable separating membrane;
a gasket holding a periphery of the separating membrane; and
a frame-shaped and electrically insulating protecting member holding the gasket, the protecting member comprising:
a frame-shaped base body; and
a frame-shaped lid member;
the base body comprising:
a receiving part being arranged in an inner periphery of the base body and receiving the gasket and the lid member;
a supporting part protruding from the receiving part and extending toward an inner periphery side of the base body, and supporting the gasket received in the receiving part in a direction crossing a main face of the separating membrane; and
the lid member having dimensions such that the lid member can be received in the receiving part of the base body,
the gasket and the lid member being received in the receiving part of the base body, such that the gasket is sandwiched between the supporting part of the base body and the lid member,
the gasket being in direct physical contact with both faces of the separating membrane,
each adjacent pair of the first face of the electroconductive separating wall and the separating membrane facing the first face of the electroconductive separating wall defining a first chamber therebetween, the first chamber comprising a first electrode arranged therein and electrically connected with the electroconductive separating wall of the pair defining the first chamber; and
each adjacent pair of the second face of the electroconductive separating wall and the separating membrane facing the second face of the electroconductive separating wall defining a second chamber therebetween, the second chamber comprising a second electrode arranged therein and electrically connected with the electroconductive separating wall of the pair defining the second chamber, wherein
an outer periphery of the lid member has same dimensions as an inner periphery of the receiving part of the base body,
an inner periphery of the lid member has same dimensions as an inner periphery of the supporting part of the base body,
a thickness of the lid member is such that a total of thickness of the gasket holding the separating membrane and the thickness of the lid member is same as a depth of the receiving part of the base body, in the stacking direction,
a pressure inside the first chamber is kept higher than atmospheric pressure by 400 kPa or more, and
a pressure inside the second chamber is kept higher than atmospheric pressure by 400 kPa or more.
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