Title:
【発明の名称】塩溶液の電気透析により酸溶液および塩基溶液を生成する方法
Document Type and Number:
Japanese Patent JP2583510
Kind Code:
B2
Abstract:
A method and apparatus for generating acid and base regenerant solutions by utilization of a bipolar membrane electrodialysis stack (10). A mineral-containing salt solution (14) is continuously circulated (27) through the stack to produce a partially demineralized salt solution (28), an acid solution (30) and a base solution (32). The acid solution (16) and base solution (18) are continuously circulated through the stack (10) to increase the concentration thereof. The circulating salt solution is controlled to maintain the salt concentration (36, 38) in the range of 2% to 25% and the pH (109, 112) in the range of 8-11. The concentrations of the circulating acid solution (60) and base solution (64) are controlled to maintain the concentrations thereof in the range of .2N to 3.0N. The concentrated acid solution (20) and base solution (22) are utilized to regenerate exhausted ion-exchange resins (106, 108).
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Inventors:
TOOMASU EI DEIUISU
DONARUDO JEI BATAAWAASU
DONARUDO JEI BATAAWAASU
Application Number:
JP15323487A
Publication Date:
February 19, 1997
Filing Date:
June 19, 1987
Export Citation:
Assignee:
GUREIBAA CO ZA
International Classes:
B01D61/44; B01J49/00; B01J49/90; C02F1/42; C02F1/469; (IPC1-7): B01D61/44; C02F1/469
Domestic Patent References:
| JP5061387A |
Attorney, Agent or Firm:
Minoru Nakamura (4 outside)