Method for preparing aluminum-doped battery-grade hydroxyl manganese oxide by utilizing waste manganese liquid

A manganese oxyhydroxide, battery-level technology, applied in the direction of manganese oxide/manganese hydroxide, etc., can solve the problems of long operation time, poor production efficiency, high production cost, etc., achieve the reduction of heavy metal impurity ions, solve the problem of excessive reagent residue, production low cost effect

Pending Publication Date: 2021-03-16
杜长福
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The production process of battery grade manganese sulfate in the related art is as follows: figure 1 As shown, in the production process, a large amount of sulfuric acid and liquid caustic soda will be consumed for extraction; the process takes a long time to operate, the production cost is high, and the production efficiency is not good. It is only used as an environmental protection supporting project
[0004] The treatment process of manganese waste liquid precipitation method in related technology is as follows: figure 2 As shown, about 2 tons of sodium carbonate are needed to precipitate 1 ton of manganese, and there are subsequent waste water treatment costs, labor, energy, etc. The preliminary estimate is that the price of 1 ton of waste manganese metal is about 5,000 yuan; at the same time, manganese waste residue still needs post-processing , resulting in increased consumption and low production efficiency
[0005] The overall utilization rate of manganese waste in related technologies is low, and the consumption of auxiliary materials is high, resulting in low production efficiency

Method used

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  • Method for preparing aluminum-doped battery-grade hydroxyl manganese oxide by utilizing waste manganese liquid
  • Method for preparing aluminum-doped battery-grade hydroxyl manganese oxide by utilizing waste manganese liquid
  • Method for preparing aluminum-doped battery-grade hydroxyl manganese oxide by utilizing waste manganese liquid

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Embodiment 1

[0053] Embodiment 1 of the present invention is: a method for preparing aluminum-doped battery-grade manganese oxyhydroxide by using waste manganese liquid, such as image 3 shown, including the following steps:

[0054] S1. Decalcification by precipitation (purification A):

[0055]Add the waste manganese liquid into the reaction kettle, start stirring, control the temperature at 85°C, adjust the pH value of the solution to 5.3, add manganese fluoride precipitant to make the Ca element concentration in the solution reach the specified value (0.005g / L), continue The reaction is not less than 2 hours, filtered and separated, the filtrate is aged for 24 hours, and the aged liquid is finely filtered to obtain a crude manganese solution;

[0056] S2. Manganese replacement precipitation (purification B):

[0057] Add the crude manganese solution into the reaction kettle, start stirring, heat to 60°C, adjust the pH of the solution to 1.8, gradually add manganese powder to make the...

Embodiment 2

[0073] Embodiment 2 of the present invention is: a method for preparing aluminum-doped battery-grade manganese oxyhydroxide by using waste manganese liquid, such as image 3 shown, including the following steps:

[0074] S1. Decalcification by precipitation (purification A):

[0075] Add the waste manganese solution into the reaction kettle, start stirring, control the temperature at 83°C, adjust the pH value of the solution to 5.3, add manganese fluoride precipitant to make the Ca element in the solution reach the specified value (0.005g / L), continue React for 2 hours, filter and separate, age the filtrate for 24 hours, fine filter the aged solution to obtain a crude manganese solution;

[0076] S2. Manganese replacement precipitation (purification B):

[0077] Add the crude manganese solution into the reaction kettle, start stirring, heat to 60°C, adjust the pH of the solution to 1.8, gradually add manganese powder to make the Cu element in the solution reach the specified...

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Abstract

The invention discloses a method for preparing aluminum-doped battery-grade hydroxyl manganese oxide from waste manganese liquid, which comprises the following steps: adding a precipitant into the waste manganese liquid, and removing solid-phase impurities to obtain a crude manganese solution; adding manganese powder into the crude manganese solution to obtain a refined manganese solution; addingsulfide into the crude manganese solution to obtain a purified manganese solution; adding aluminum salt and a settling agent A into the purified manganese solution to obtain a manganese sulfate solution; and adding aluminum, a complexing agent B and an alkaline substance into the manganese sulfate solution, and oxidizing to obtain hydroxyl manganese oxide. The combination of impurity removal reagents and product doping is ingeniously utilized, the problem that excessive impurity removal reagents remain in the impurity removal process is solved, and the product performance is improved.

Description

technical field [0001] The invention relates to the field of electrode materials, in particular to a method for preparing aluminum-doped battery-grade manganese oxyhydroxide by using waste manganese liquid. Background technique [0002] The waste manganese liquid comes from the P204 extraction, purification and impurity removal process section in nickel and cobalt production enterprises. This process section extracts the impurities extracted into the organic phase to obtain waste liquid after back extraction. Its main component is manganese element, and there is also a small amount of Copper, zinc, cobalt and calcium elements, etc. At the same time, with the decommissioning of ternary batteries, waste manganese liquid will also be formed in the process of dismantling and utilizing waste ternary positive electrode materials and wet treatment to recover nickel, cobalt, manganese and lithium; the recycling of waste manganese liquid needs to be solved urgently. [0003] At this...

Claims

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Application Information

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IPC IPC(8): C01G45/02
CPCC01G45/02C01P2006/80C01P2004/61C01P2006/82C01P2006/12
Inventor 杜长福
Owner 杜长福
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