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membrane stack

A membrane stacking and stacking technology, applied in the field of ion exchange unit and its preparation process, can solve the problems of increasing the complexity and cost of membrane stacking, inconvenient execution and the like

Active Publication Date: 2020-06-23
FUJIFILM MFG EURO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such chemical treatments involve highly aggressive chemicals and are cumbersome to perform, adding to the complexity and cost of fabricating membrane stacks

Method used

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Examples

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Embodiment Construction

[0022] figure 1 The IEU of a prior art lower plate and frame construction 10 is shown. The prior art IEU 10 has a rectangular frame 12 . The frame 12 includes a rigid front panel 14 and a rigid rear panel 16 made of metal. Front panel 14 and rear panel 16 are releasably secured together in a non-permanent manner by a plurality of tie rods or bolts 18 .

[0023] accessible figure 2 The process of the present invention, shown schematically in , produces non-helically wound membrane stacks (or planar stacks). The stack comprises three planar anion-exchange membranes 1 and three planar cation-exchange membranes 2, each of which is passed through adhesive lines 3 and 3' interposed between the two membranes (three at the front and three at the rear, each side two) permanently affixed to the next membrane along the two opposing edges. Each pair of films 1 and 2 and adhesive lines 3 and 3' defines a compartment. The adhesive lines 3 and 3' also define the direction in which liq...

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Abstract

A process for preparing a membrane stack comprising the steps of: (i) inserting a curable adhesive between alternating anion-exchange membranes and cation-exchange membranes; and (ii) curing the adhesive; characterized in that when the When cured, the adhesive has a Shore A hardness of less than 70 and an elongation at break of at least 50%.

Description

technical field [0001] The present invention relates to membrane stacks, to ion exchange units comprising membrane stacks and to processes for their preparation. Background technique [0002] Ion exchange units ("IEUs") such as reverse electrodialysis units and electrodialysis units are known. [0003] An IEU typically includes an anode, a cathode, and a membrane stack between the anode and cathode. The membrane stack includes alternating diluting and concentrating compartments, each compartment having cation-permeable and anion-permeable membrane walls. In reverse electrodialysis ("RED"), a concentrated ionic solution is typically fed through a dilute compartment, and a solution of less ion concentration is fed through a concentrated compartment. In electrodialysis ("ED"), a solution of ions is typically fed through all compartments, where ions are forced from a solution in a dilute compartment to a solution in a concentrate compartment by the application of an electric f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D63/00B01D61/46B01D61/50
CPCB01D61/46B01D61/50B01D63/00B01D2319/02B01D2319/06B01D2325/42B01D2311/2623B01D63/0822B01D63/081B01D2315/10B01D2325/08B01D2325/14B01D2325/16Y10T156/1089Y10T156/1744B01D65/003Y02A20/124B29C65/4805B29C66/70B29C65/4855B29C65/48
Inventor 皮特·杰森维诺德纳拉因·贝克维利姆·范·巴克约翰尼斯·范·恩哥伦巴斯蒂安·范·贝尔胡姆
Owner FUJIFILM MFG EURO