Title:
METHOD AND DEVICE FOR MANUFACTURING SODIUM HYPOCHLORITE SOLUTION
Document Type and Number:
WIPO Patent Application WO/2022/230422
Kind Code:
A1
Abstract:
Provided are a method and device for manufacturing a sodium hypochlorite solution on-site with high efficiency and while suppressing initial cost and operating cost, without the problem of impurities arising from raw material water or a raw material salt. The present invention is a method for manufacturing a sodium hypochlorite solution on-site in the vicinity of a facility where the sodium hypochlorite solution is used. The present invention includes, when manufacturing a sodium hypochlorite solution by supplying a secondary brine to the positive electrode chamber of an electrolysis tank partitioned into a positive electrode chamber and a negative electrode chamber by an ion exchange membrane and reacting the electrolyzed component in the positive electrode chamber and the negative electrode chamber in a reaction tank, the steps of treating raw material water A with a cation exchange resin B to produce purified water 5, dissolving a raw salt D in the purified water to produce a primary brine E, performing an inspection to confirm the presence of a precipitate or suspended matter in the primary brine, and producing a secondary brine 4 by performing a chelating treatment of the primary brine directly when no precipitate or suspended matter is present therein, and otherwise performing the chelating treatment after dissolving the precipitate or suspended matter by adding an acid component thereto.
Inventors:
DOMON HIROKI (JP)
OHARA MASAHIRO (JP)
KATO MASAAKI (JP)
OHARA MASAHIRO (JP)
KATO MASAAKI (JP)
Application Number:
PCT/JP2022/012033
Publication Date:
November 03, 2022
Filing Date:
March 16, 2022
Export Citation:
Assignee:
DE NORA PERMELEC LTD (JP)
International Classes:
C25B1/26; C02F1/42; C25B1/46; C25B9/21; C25B15/025; C25B15/08
Foreign References:
| US20070251831A1 | 2007-11-01 | |||
| JPH0610177A | 1994-01-18 | |||
| JPH05186215A | 1993-07-27 | |||
| JPS59190215A | 1984-10-29 | |||
| JPH0731979A | 1995-02-03 | |||
| JPH05179475A | 1993-07-20 | |||
| JP2013096001A | 2013-05-20 |
Attorney, Agent or Firm:
HONDA Ichiro (JP)
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