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Method for preparing battery-grade manganese sulfate by using copper chloride manganese liquid

A technology of manganese sulfate and copper chloride, applied in the direction of manganese sulfate and the like, can solve the problems of high cost of extraction and decalcification, difficult process control, etc., and achieve the effects of reducing burden, saving costs, and increasing the concentration of manganese ions.

Inactive Publication Date: 2018-09-28
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Obviously, the manganese products prepared in Chinese patents CN105967217A and CN105296754A are industrial-grade manganese chloride or industrial-grade manganese carbonate. Although Chinese patent CN104445424A can produce battery-grade manganese sulfate products, there are two major deficiencies: one is to use calcium hydroxide to regulate The pH value leads to high cost of extraction and decalcification; the second is to extract manganese first, and then use sulfuric acid to back-extract manganese, which is difficult to control the process

Method used

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  • Method for preparing battery-grade manganese sulfate by using copper chloride manganese liquid
  • Method for preparing battery-grade manganese sulfate by using copper chloride manganese liquid
  • Method for preparing battery-grade manganese sulfate by using copper chloride manganese liquid

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Effect test

Embodiment 1

[0044] Copper manganese chloride solution is taken from a well-known domestic enterprise group, and its chemical composition is (g / L): Mn 129, Cu 1.633, Zn6.711, Co 2.795, Ca 10.2, Al 2.274, H + 0.65mol / L.

[0045] Step 1: manganese carbonate adjusts the pH value of the solution to selectively precipitate copper: add manganese carbonate powder to the copper manganese chloride solution, wherein the molar ratio of manganese carbonate powder to hydrogen ions in the solution is 0.43:1.0, slowly add in batches, and control the pH of the system The value is 3.0, the reaction temperature is 60° C., and the reaction time is 3.0 h. After the reaction, solid-liquid separation is carried out to obtain the copper-removed liquid and copper-rich slag (basic copper chloride).

[0046] Step 2: Add manganese sulfide powder according to the ratio of the amount of Me (Me represents the sum of Cu, Co, Zn) and MnS in the liquid after copper precipitation is 1.0:1.1, and heat the reaction system t...

Embodiment 2

[0055] Copper manganese chloride solution is taken from a well-known domestic enterprise group, and its chemical composition is (g / L): Mn 120, Cu 0.833, Zn5.24, Co 1.41, Ca 5.2, Al 2.25, H + 0.25mol / L.

[0056] Step 1: Manganese carbonate adjusts the pH value of the solution to selectively precipitate copper: add manganese carbonate powder to the copper manganese chloride solution, wherein the molar ratio of manganese carbonate powder to hydrogen ions in the solution is 0.35:1.0, slowly add in batches, and control the pH of the system The value is 2.8, the reaction temperature is 55°C, and the reaction time is 3.5h. After the reaction, solid-liquid separation is carried out to obtain the copper-removed liquid and copper-rich slag (basic copper chloride).

[0057] Step 2: Add manganese sulfide powder according to the ratio of the amount of Me (Me represents the sum of Cu, Co, Zn) and MnS in the liquid after copper precipitation is 1.0:1.2, and heat the reaction system to 90°C ...

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Abstract

The invention discloses a method for preparing battery-grade manganese sulfate by using a copper chloride manganese liquid. The method comprises the steps that the copper chloride manganese liquid reacts with concentrated sulfuric acid to synthesize a coarse manganese sulfate crystal after neutralizing and precipitating copper ions through manganese carbonate, precipitating heavy metal ions through manganese sulfide, preliminarily precipitating calcium ions through manganese sulfate and deeply precipitating calcium ions through active manganese fluoride in sequence; and the coarse manganese sulfate crystal is recrystallized to obtain a battery-grade manganese sulfate crystal. The method for preparing the battery-grade manganese sulfate by using the copper chloride manganese liquid has theadvantages that the whole process adopts manganese-containing materials to remove and recover cuprum, zinc, calcium and other components in the copper chloride manganese liquid, and a five-stage countercurrent series recrystallization purification technology is combined, so that the quality of manganese sulfate is greatly improved, and the high-efficiency utilization of manganese resources and thewhole-process no-waste-water discharge are ensured; concentrated sulfuric acid is directly adopted to achieve the precipitation and conversion of manganese chloride to synthesize the coarse manganesesulfate, and the complex process for synthesizing the manganese sulfate by firstly extracting manganese ions then reversely extracting sulfuric acid or firstly precipitating manganese ions through carbonate then synthesizing the manganese sulfate through sulfuric acid dissolution is avoided.

Description

technical field [0001] The invention relates to a method for preparing battery-grade manganese sulfate, in particular to a method for preparing battery-grade manganese sulfate by using copper-manganese chloride solution with high acidity and high metal concentration as a raw material, through deep decalcification and heavy metal treatment, and belongs to The field of hydrometallurgy technology. Background technique [0002] With the continuous development of the new energy battery industry, the demand for battery-grade manganese sulfate required for ternary materials is increasing. However, the production process of existing battery-grade manganese sulfate is relatively complicated, resulting in high cost of battery-grade manganese sulfate products. The common synthesis method of battery-grade manganese sulfate is generally to convert manganese-containing materials into manganese sulfate solution by leaching with sulfuric acid, and then use sodium sulfide precipitation to r...

Claims

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Application Information

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IPC IPC(8): C01G45/10
CPCC01G45/10
Inventor 周康根彭长宏陈伟潘立欣
Owner CENT SOUTH UNIV
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