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Method for preparing high-purity manganese sulfate from manganese-containing waste liquid

A technology of manganese sulfate and waste liquid, applied in the direction of manganese sulfate, etc., can solve the problems of low utilization value of manganese hydroxide, difficult solid waste treatment, environmental pollution, etc., to reduce the amount of waste residue, reduce the difficulty of treatment, and increase the separation coefficient Effect

Inactive Publication Date: 2015-03-25
ZHEJIANG HUAYOU COBALT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The manganese hydroxide produced by the lime precipitation method has low utilization value and is difficult to treat as a solid waste; the preparation of manganese sulfate after impurity removal is mainly to use sulfide to remove heavy metals, fluoride to remove calcium and magnesium, and then extract with P204 or P507 extractant Manganese, manganese sulfate products are produced by back extraction. This method uses fluoride, which makes the wastewater contain fluoride ions and pollutes the environment.

Method used

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  • Method for preparing high-purity manganese sulfate from manganese-containing waste liquid
  • Method for preparing high-purity manganese sulfate from manganese-containing waste liquid
  • Method for preparing high-purity manganese sulfate from manganese-containing waste liquid

Examples

Experimental program
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Effect test

example 1

[0028] experiment procedure

[0029] 1) Adjust the pH of the feed solution to 4.5 with limestone, react for 2 hours, and filter;

[0030] 2) When the temperature is 50°C, add ammonium sulfide to the filtrate to remove heavy metals, add sulfuric acid appropriately, control the pH at about 4.5, react for 1 hour, and filter;

[0031] 3) The pH of the filtrate is adjusted back to 3.5 as the extraction feed liquid;

[0032] 4) Mix 400mL Cyanex272 organically with 1600mL kerosene, the effective organic content is 25% (volume ratio);

[0033] 5) Weigh 25.2g of NaOH solid and dissolve it into 58.7g of distilled water to form caustic soda with a concentration of 30%;

[0034] 6) Add caustic soda to the mixed organic, and carry out homogeneous saponification to the organic, and the saponification rate is 50%;

[0035] 7) Organic 280mL, water phase 100mL, organic extraction of water phase twice, after reaching saturation, use 50mL of dilute acid with pH=4.0 to wash the organic twice, ...

example 2

[0043] experiment procedure

[0044] 1) Adjust the pH of the feed liquid to 3.0 with limestone, react for 2 hours, and filter;

[0045] 2) When the temperature is 50°C, add ammonium sulfide to the filtrate to remove heavy metals, add sulfuric acid appropriately, control the pH at about 4.0, react for 1 hour, and filter;

[0046] 3) The pH of the filtrate is adjusted back to 3.0 as the extraction feed liquid;

[0047] 4) Mix 400mL Cyanex272 organically with 2000mL kerosene, the effective organic content is 20% (volume ratio);

[0048] 5) Weigh 25.2g of NaOH solid and dissolve it into 58.7g of distilled water to form caustic soda with a concentration of 30%;

[0049] 6) Add caustic soda to the mixed organic, and carry out homogeneous saponification to the organic, and the saponification rate is 55%;

[0050] 7) Organic 300mL, water phase 100mL, organic extraction of water phase twice, after reaching saturation, use 50mL of dilute acid with pH=4.5 to wash the organic twice, us...

example 3

[0058] experiment procedure

[0059] 1) Adjust the pH of the feed liquid to 5.5 with limestone, react for 2 hours, and filter;

[0060] 2) When the temperature is 50°C, add ammonium sulfide to the filtrate to remove heavy metals, add sulfuric acid appropriately, control the pH at about 6.0, react for 1 hour, and filter;

[0061] 3) The pH of the filtrate is adjusted back to 4.0 as the extraction feed liquid;

[0062] 4) Mix 400mL Cyanex272 organically with 1600mL kerosene, the effective organic content is 25% (volume ratio);

[0063] 5) Weigh 25.2g of NaOH solid and dissolve it into 58.7g of distilled water to form caustic soda with a concentration of 30%;

[0064]6) Add caustic soda to the mixed organic, and carry out homogeneous saponification to the organic, and the saponification rate is 50%;

[0065] 7) Organic 280mL, water phase 100mL, organic extraction of water phase 2 times, after reaching saturation, use 50mL of dilute acid with pH=4.5 to wash the organic twice, u...

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Abstract

The invention relates to a method for preparing high-purity manganese sulfate from a manganese-containing waste liquid. The existing method for treating the high-manganese-containing waste liquid generated in the wet production of cobalt salts mainly comprises a lime precipitation method and a method for preparing manganese sulfate by removing calcium and magnesium via fluoride and adopting a P204 or P507 extracting agent and has the respective problems that the utilization value of prepared manganese hydroxide is low, the fluoride-containing wastewater is polluted and the like. According to the method, heavy metals are removed by virtue of sulfide, manganese is extracted through a Cyanex272 extracting agent, calcium and magnesium are thrown and the reverse extraction is performed to obtain the high-purity manganese sulfate product which can meet the requirement of a ternary cell material on manganese sulfate; and the method has the advantages of short process flow, no fluoride pollution and the like.

Description

technical field [0001] The invention relates to a method for preparing high-purity manganese sulfate, in particular to a process for treating manganese-containing waste liquid produced in cobalt salt wet production. Background technique [0002] At present, in the wet production of cobalt salts, the extraction method is used to separate impurities, resulting in a waste liquid with high manganese content. The methods for treating this waste liquid mainly include lime precipitation and preparation of manganese sulfate after impurity removal. The manganese hydroxide produced by the lime precipitation method has low utilization value and is difficult to treat as a solid waste; the preparation of manganese sulfate after impurity removal is mainly to use sulfide to remove heavy metals, fluoride to remove calcium and magnesium, and then extract with P204 or P507 extractant Manganese, manganese sulfate products are produced by back extraction. This method uses fluoride, which makes ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G45/10
CPCC01G45/10
Inventor 韩笑朱继俊孟凡兵刘玉珠
Owner ZHEJIANG HUAYOU COBALT
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