Title:
PROCESS FOR PRODUCING DEIONIZED WATER BY ELECTRICAL DEIONIZATION TECHNIQUE
Document Type and Number:
WIPO Patent Application WO/1997/046491
Kind Code:
A1
Abstract:
A conventional process for producing deionized water by the electrical deionization technique using an electrical deionization apparatus provided with desalting chambers and concentration chambers arranged alternately is problematic in that the power consumption is high, though it is advantageous in that it can dispense with the regeneration of ion-exchange resins by using chemicals. In order to solve this problem, the process of the invention comprises supplying nontreated water and nonconcentrated water to, respectively, the desalting chambers and the concentration chambers in such a manner that the ratio of the flow rate of nontreated water to that of nonconcentrated water ranges from 6:1 to 12:1 and the linear velocity of both of the waters ranges from 75 to 150 m/h. The above-specified ratio and velocity are necessary to increase the amount of migration of impurity ions toward the concentration chambers to thereby increase the conductivity of these chambers.
Inventors:
SHINMEI YASUTAKA (JP)
HOSODA KOICHI (JP)
TAMURA MAKIO (JP)
OKUGAWA KATSUMI (JP)
HOSODA KOICHI (JP)
TAMURA MAKIO (JP)
OKUGAWA KATSUMI (JP)
Application Number:
PCT/JP1996/001517
Publication Date:
December 11, 1997
Filing Date:
June 03, 1996
Export Citation:
Assignee:
ORGANO CORP (JP)
SHINMEI YASUTAKA (JP)
HOSODA KOICHI (JP)
TAMURA MAKIO (JP)
OKUGAWA KATSUMI (JP)
SHINMEI YASUTAKA (JP)
HOSODA KOICHI (JP)
TAMURA MAKIO (JP)
OKUGAWA KATSUMI (JP)
International Classes:
B01D61/48; B01J47/08; C02F1/46; C02F1/469; (IPC1-7): C02F1/469; B01D61/48
Foreign References:
| JPH0471624A | 1992-03-06 | |||
| JPH07265865A | 1995-10-17 | |||
| JPS5247580A | 1977-04-15 | |||
| JPH08150393A | 1996-06-11 |
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