Title:
TREATMENT METHOD FOR CHLORINE GAS
Document Type and Number:
WIPO Patent Application WO/2023/048196
Kind Code:
A1
Abstract:
Provided is a treatment method for chlorine gas whereby chlorine gas generated when a battery powder is dissolved in hydrochloric acid to leach a valuable metal using the hydrochloric acid can be rendered harmless or used effectively. This treatment method for chlorine gas generated when a battery powder containing a valuable metal obtained from a waste lithium ion battery is dissolved in hydrochloric acid to leach the valuable metal using the hydrochloric acid includes a step for reacting the chlorine gas with at least one substance selected from the group consisting of reducing agents, alkali metal hydroxides and alkaline earth metal hydroxides. Examples of the reducing agent include: a first aqueous ferrous chloride solution containing ferric chloride; and hydrogen gas.
Inventors:
YAMADA KEITA (JP)
SAKUMA YUKIO (JP)
HIRAOKA TARO (JP)
NAKAZAWA JUN (JP)
SAKUMA YUKIO (JP)
HIRAOKA TARO (JP)
NAKAZAWA JUN (JP)
Application Number:
PCT/JP2022/035235
Publication Date:
March 30, 2023
Filing Date:
September 21, 2022
Export Citation:
Assignee:
ASAKA RIKEN CO LTD (JP)
International Classes:
C22B7/00; B01D53/68; B01D53/78; C22B3/04; C22B3/10
Foreign References:
| JPH11293356A | 1999-10-26 | |||
| JP2008110339A | 2008-05-15 | |||
| JP2010077399A | 2010-04-08 | |||
| JPS5193552A | 1976-08-17 | |||
| JP2000303084A | 2000-10-31 | |||
| JP2005052724A | 2005-03-03 | |||
| JP2012046794A | 2012-03-08 |
Attorney, Agent or Firm:
SATO & ASSOCIATES (JP)
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