Title:
SYSTEM FOR PRODUCING MAGNESIUM CHLORIDE AQUEOUS SOLUTION AND SYSTEM FOR PRODUCING MAGNESIUM
Document Type and Number:
WIPO Patent Application WO/2021/140840
Kind Code:
A1
Abstract:
One purpose of the present invention is to provide a system for producing a magnesium chloride aqueous solution, said system making it possible to further reduce drug-related costs compared to conventional methods. The present invention relates to a system for producing a magnesium chloride aqueous solution, said system comprising: a crystallization unit that adds a sodium hydroxide aqueous solution to to-be-treated water consisting of seawater as a feedstock material, and generates a reaction slurry having magnesium hydroxide particles dispersed therein; a precipitation unit that stores the reaction slurry, and causes the precipitation of particles to separate the reaction slurry into recovered slurry and a separated liquid; a removal unit that removes divalent positive ions from the to-be-treated water or separated liquid, and generates a reaction liquid; an acid-alkali generation unit that generates a sodium hydroxide aqueous solution and hydrochloric acid from the reaction liquid; and a reaction unit that adds the hydrochloric acid to the recovered slurry, and generates a magnesium chloride aqueous solution. The acid-alkali generation unit includes: a main unit that generates the sodium hydroxide aqueous solution and the hydrochloric acid from the reaction liquid; a first connection unit that supplies the sodium hydroxide aqueous solution to the crystallization unit; and a second connection unit that supplies the hydrochloric acid to the reaction unit.
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Inventors:
ITO YOSHIAKI (JP)
TAKEUCHI KAZUHISA (JP)
KIYOSAWA MASASHI (JP)
TAKEUCHI KAZUHISA (JP)
KIYOSAWA MASASHI (JP)
Application Number:
PCT/JP2020/046592
Publication Date:
July 15, 2021
Filing Date:
December 14, 2020
Export Citation:
Assignee:
MITSUBISHI POWER LTD (JP)
International Classes:
C01F5/32; C22B3/10; C22B3/44; C22B26/22; C25C3/04
Domestic Patent References:
| WO2019150514A1 | 2019-08-08 |
Foreign References:
| JP2017133045A | 2017-08-03 |
Attorney, Agent or Firm:
MATSUNUMA Yasushi et al. (JP)
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