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Method of preparing battery grade lithium hydroxide from active waste of lithium ion battery anode

A lithium-ion battery, positive electrode active technology, applied in the direction of lithium oxide;/hydroxide, battery recycling, recycling technology, etc., can solve the problems of complex separation and purification process, single research object, difficulty, etc., to avoid chemical agents The effect of high consumption, simple process and low processing cost

Active Publication Date: 2018-05-25
CHANGSHA RES INST OF MINING & METALLURGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The early waste lithium batteries were mainly lithium cobalt oxide, lithium iron phosphate, lithium manganese oxide, etc., and the research objects were single. However, with the technological progress and commercial development of positive electrode materials, various binary or ternary materials with different compositions began to The emergence of metal ions presents a diversity, which makes the subsequent separation and purification process of battery recycling complicated and difficult

Method used

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  • Method of preparing battery grade lithium hydroxide from active waste of lithium ion battery anode
  • Method of preparing battery grade lithium hydroxide from active waste of lithium ion battery anode
  • Method of preparing battery grade lithium hydroxide from active waste of lithium ion battery anode

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Embodiment 1

[0036] A kind of method of the present invention utilizes lithium-ion battery cathode waste to prepare battery-grade lithium hydroxide, and its process flow chart is as follows figure 1 shown, including the following steps:

[0037] (1) Nickel-cobalt-manganese ternary composite positive electrode material is treated by oxidative acid leaching, and the leaching agent is H 2 SO 4 solution and Na 2 S 2 o 8 The mixed solution of solution, obtains the sulfuric acid leaching liquor that 10L contains metal ions such as lithium ion;

[0038] (2) Add saponified P507 to extract manganese and cobalt in the sulfuric acid leaching solution after step (1), separate the aqueous phase and the loaded organic phase; add pure water to the loaded organic phase for washing, and incorporate the nickel-containing lithium washing water into the pre-extraction solution That is, in the sulfuric acid leaching solution of step (1), then adding a concentration of 1mol / L H in the loaded organic phase ...

Embodiment 2

[0047] A method for preparing battery-grade lithium hydroxide using lithium-ion battery positive electrode waste of the present invention comprises the following steps:

[0048] (1) Adopt the oxidative acid leaching method to process the positive electrode active waste of lithium ion battery. 2 o 2 The mixed solution of solution obtains 10L acid leach solution containing metal ions such as lithium ions;

[0049] (2) Add saponified Cyanex272 to extract manganese and cobalt in the hydrochloric acid leachate obtained in step (1), separate the aqueous phase and the loaded organic phase; the loaded organic phase is washed with pure water, and the washing water is incorporated into the acidic solution of step (1) The leaching solution is the pre-extraction solution, and then add dilute hydrochloric acid solution to the loaded organic phase for back extraction to obtain an enriched solution of manganese and cobalt, and the primary raffinate enters step (3) for processing;

[0050] ...

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Abstract

The invention provides a method of preparing battery grade lithium hydroxide from active waste of a lithium ion battery anode. The method comprises the following steps: processing the active waste ofthe lithium ion battery anode by an oxidized acid soaking method to form an acid extract, performing two-step extraction, regulating a pH (potential of hydrogen) value of a solution to separate manganese, cobalt and nickel to achieve comprehensive recovery of valuable metals and deep removal of foreign particles of elements such as Fe, Ni, Ca, Mg, Cu and Al, avoiding the loss of lithium effectively in the process, performing deep purification treatment on extraction raffinate with strong-acid cation exchange resin to form a purified lithium-rich solution, treating the purified lithium-rich solution by a bipolar membrane electrodialysis method to form a lithium hydroxide solution and an acid solution, and performing evaporation and concentration on the lithium hydroxide solution to form thebattery grade lithium hydroxide product. The battery grade lithium hydroxide product directly used for the preparation of a ternary anode material can be obtained by the method, and the value-added treatment of the lithium is achieved.

Description

technical field [0001] The invention belongs to the technical field of recycling lithium-ion battery waste materials, and in particular relates to a method for preparing battery-grade lithium hydroxide by utilizing positive electrode active waste materials of lithium-ion batteries. Background technique [0002] The large-scale market-oriented new energy automobile industry has boosted the vigorous development of the lithium industry. In recent years, the market demand for lithium has grown exponentially, and the transaction price of lithium has remained high. Under the continuous stimulation of the market, the lithium resource development industry is in full swing. Whether it is lithium-containing ore or lithium-rich salt lake brine, with the continuous consumption of primary resources, the recycling of lithium resources is becoming more and more important to the sustainable development of the industry. [0003] Today, with new energy products changing with each passing day,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01D15/02H01M10/54
CPCC01D15/02H01M10/54Y02W30/84
Inventor 吴江华宁顺明佘宗华邢学永李贺王文娟张丽芬万洪强李肇佳刘建忠陈文勇危亚辉黄臻高
Owner CHANGSHA RES INST OF MINING & METALLURGY
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