Title:
METHOD FOR PROCESSING ALLOY
Document Type and Number:
WIPO Patent Application WO/2023/037876
Kind Code:
A1
Abstract:
A method is provided which enables selectively leaching nickel and/or cobalt from an alloy that contains copper and nickel and/or cobalt in a waste lithium ion battery. This alloy processing method involves obtaining a solution that contains nickel and/or cobalt from an alloy that contains copper and nickel and/or cobalt, wherein the alloy processing method involves a leaching step for adding an acid solution to the alloy in a state in which a sulfurizing agent is also present, and obtaining a leachate and a leaching residue by performing leaching processing while controlling the redox potential (the reference electrode being a silver / silver chloride electrode) to at least 100mV and less than 250mV. In the leaching processing in the leaching step, an operation is performed that temporarily decreases the redox potential to less than or equal to -100mV.
Inventors:
SHOUJI HIROFUMI (JP)
TAKENOUCHI HIROSHI (JP)
MATSUOKA ITSUMI (JP)
SANJO SHOTA (JP)
MATSUGI TAKUMI (JP)
ASANO SATOSHI (JP)
HEGURI SHIN-ICHI (JP)
TAKENOUCHI HIROSHI (JP)
MATSUOKA ITSUMI (JP)
SANJO SHOTA (JP)
MATSUGI TAKUMI (JP)
ASANO SATOSHI (JP)
HEGURI SHIN-ICHI (JP)
Application Number:
PCT/JP2022/031842
Publication Date:
March 16, 2023
Filing Date:
August 24, 2022
Export Citation:
Assignee:
SUMITOMO METAL MINING CO (JP)
International Classes:
C22B3/06; C22B3/44; C22B7/00; C22B15/00; C22B23/00
Domestic Patent References:
| WO2021166755A1 | 2021-08-26 |
Foreign References:
| JP2019081915A | 2019-05-30 | |||
| JP2019065346A | 2019-04-25 | |||
| JP2012172169A | 2012-09-10 |
Attorney, Agent or Firm:
SHOBAYASHI Masayuki et al. (JP)
Download PDF:
Previous Patent: VARIABLE CAPACITY-TYPE OIL PUMP
Next Patent: FORWARD OSMOSIS TREATMENT METHOD AND FORWARD OSMOSIS TREATMENT DEVICE
Next Patent: FORWARD OSMOSIS TREATMENT METHOD AND FORWARD OSMOSIS TREATMENT DEVICE