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Electrodeionization module and device comprising same

A technology of electrodeionization and ion exchange device, which can be used in electrodialysis, separation method, dispersed particle separation, etc., and can solve problems such as low efficiency

Inactive Publication Date: 2008-05-07
MILLIPORE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the main limitation of these EDI devices is that they are compatible with large amounts of dissolved CO 2 water prone to scale formation and their inefficiency

Method used

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  • Electrodeionization module and device comprising same
  • Electrodeionization module and device comprising same
  • Electrodeionization module and device comprising same

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Embodiment Construction

[0049] In the embodiment shown in FIG. 1, the electrodeionization module 10 of the present invention, in a manner known per se, includes a desalination compartment 11 and a desalination compartment alternately arranged between two terminal electrodes, namely, a cathode 13 and an anode 14. Concentration compartment 12.

[0050] Each desalination compartment 11 is separated from two adjacent concentration compartments 12 by an anion selective ion exchange membrane 15 and a cation selective ion exchange membrane 16 respectively.

[0051] In the illustrated embodiment, the selective membranes adjacent to the cathode 13 and the anode 14 are composed of a cation selective membrane 16 and an anion selective membrane 15, respectively. The compartments located between these membranes and the respective electrodes 13, 14 described later are concentrated compartments 12, which form electrode compartments containing the cathode 13 and the anode 14, respectively.

[0052] According to the inve...

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Abstract

The electrodeionization (EDI) module of the present invention comprises at least one ion-exchange membrane delimiting at least one desalting zone (11) and at least one concentrating zone (12) situated between electrodes (13, 14), each of which is provided with ion-exchange means, and is characterized in that the ion-exchange means present in a zone are comprised of either ion-exchange resin beads (17) or at least one non-woven or woven fabric (21, 22) made of ion-exchange fibers, the resin beads and the fabrics being both present in the EDI module.

Description

Technical field [0001] The invention relates to an electrodeionization (EDI) module and a device suitable for transferring ions present in a liquid under the influence of a polar field. Specifically, the present invention relates to an EDI device suitable for purifying aqueous liquids to prepare high-purity water or ultra-pure water. Background technique [0002] Purification of aqueous liquids by reducing the concentration of ions and molecules in the liquid is an area of ​​great technical significance. Various techniques have been used to purify aqueous liquids, and most of the well-known methods include distillation, electrodialysis, reverse osmosis, liquid chromatography, membrane filtration, and ion exchange, as well as the technique known as EDI. [0003] The first known device and method for treating liquids by EDI was described by Watler et al. in 1955 (see W.R. Walters, D.W. Weister and L.J. Marek, Industrial and Engineering Chemistry, Vol. 47, No. 1, pp 61-67, 1955). US...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D61/48C02F1/469B01J47/08B01D61/50
CPCB01J47/08B01D61/50C02F2103/04B01D61/48C02F1/4695B01D2325/42Y02A20/124B01D61/463
Inventor 雅克·莫林藤原邦夫
Owner MILLIPORE CORP