Title:
溶液からニッケルとコバルトを分離する方法
Document Type and Number:
Japanese Patent JP6844029
Kind Code:
B2
Abstract:
A method for separating nickel and cobalt from a solution includes the steps of: obtaining a solution containing nickel and cobalt by acid leaching of a cathode material of a waste lithium-ion battery, adjusting the pH of the solution containing nickel and cobalt to 3.5 to 4.5, adding extractants for extraction to separate the nickel and the cobalt. The cobalt enters the organic phase, the nickel remains in the aqueous phase, and the extractants contain an acidic extractant and an alkaline extractant. The method for efficiently separating nickel and cobalt through extraction adopts a non-saponification extraction method without using NaOH as a saponifier, thereby avoiding the discharge of saponification wastewater. Under acidic conditions, the cobalt in an acidic leaching solution is effectively extracted and separated into the organic phase through synergistic action of the acidic extractant and the alkaline extractant, thereby realizing the separation of nickel from cobalt.
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Inventors:
Shishaoli
Chang Jen Jen
Mariwen
Niez Oren
Chang Jen Jen
Mariwen
Niez Oren
Application Number:
JP2019553974A
Publication Date:
March 17, 2021
Filing Date:
February 12, 2018
Export Citation:
Assignee:
Beijing Institute of Technology
International Classes:
C22B23/00; C22B3/40
Domestic Patent References:
| JP2014037606A | ||||
| JP62247099A | ||||
| JP2014162982A |
Foreign References:
| CN106636637A |
Attorney, Agent or Firm:
Mikio Yoshimiya
Toshihiro Kobayashi
Toshihiro Kobayashi