Title:
METHOD AND APPARATUS FOR PRODUCING SODIUM HYPOCHLORITE SOLUTION
Document Type and Number:
WIPO Patent Application WO/2022/254878
Kind Code:
A1
Abstract:
Provided are a method and apparatus for producing a sodium hypochlorite solution with which it is possible to produce a sodium hypochlorite solution with a high effective chlorine concentration at low cost using on-site equipment. When supplying a secondary brine, which is a sodium chloride aqueous solution, to a positive electrode chamber 2 of an electrolytic tank 10 that is partitioned by an ion exchange membrane 1 into the positive electrode chamber 2 and a negative electrode chamber 3, introducing a positive electrode solution and generated chlorine gas inside the positive electrode chamber after the electrolysis and a generated sodium hydroxide aqueous solution inside the negative electrode chamber to a reaction tank 20, and producing a sodium hypochlorite solution inside the reaction tank by a reaction of the positive electrode solution. chlorine gas, and the generated sodium hydroxide aqueous solution, which is the negative electrode solution, the process comprises a primary brine generating step for generating a primary brine by dissolving raw salt G, in which sodium chloride is the main component, in purified water B, and a chelation step for performing chelation treatment on the primary brine to generate a secondary brine A, and the salt decomposition rate is made to be in the range of 80-95%.
Inventors:
DOMON HIROKI (JP)
SUDO SHIGEKI (JP)
OTSU HIDEO (JP)
SUDO SHIGEKI (JP)
OTSU HIDEO (JP)
Application Number:
PCT/JP2022/012034
Publication Date:
December 08, 2022
Filing Date:
March 16, 2022
Export Citation:
Assignee:
DE NORA PERMELEC LTD (JP)
International Classes:
C02F1/42; C02F1/461; C25B1/26; C25B9/00; C25B9/13; C25B13/08; C25B15/02; C25B15/08
Foreign References:
| JPS5235442A | 1977-03-18 | |||
| JPS6118495A | 1986-01-27 | |||
| US20070251831A1 | 2007-11-01 | |||
| JP2013096001A | 2013-05-20 | |||
| US20140367247A1 | 2014-12-18 | |||
| CN207331079U | 2018-05-08 | |||
| JPS6118495A | 1986-01-27 | |||
| JP2013096001A | 2013-05-20 |
Other References:
AZEGAMI TATSUNORI, MIYAZAWA MASANORI, SATOSHI: "A Study of On-Site Type Generator of Hypochlorous Acid Investigation of Elemental Technologies for the Generator", NAGANO PREFECTURE GENERAL INDUSTRIAL TECHNOLOGY CENTER, 1 January 2012 (2012-01-01), pages 1 - 4, XP093011796
Attorney, Agent or Firm:
HONDA Ichiro (JP)
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