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Purification treatment method of manganese sulfate solution

A technology of manganese sulfate solution and treatment method, which is applied in the field of purification of manganese-containing solution, can solve the problem of high cost of purification treatment, and achieve the effect of reducing losses

Active Publication Date: 2022-08-05
CHINA ENFI ENGINEERING CORPORATION
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Problems solved by technology

[0006] The main purpose of the present invention is to provide a kind of purification treatment method of manganese sulfate solution, to solve the problem that the purification treatment cost of manganese sulfate solution in the prior art is high

Method used

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  • Purification treatment method of manganese sulfate solution

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Effect test

Embodiment 1

[0038] Preparation of saponified organic phase: take 1L of manganese sulfate solution, which contains: 30g / L Mn 2+ , 0.3g / L of Ca 2+ and 15g / L of Mg 2+ . Adjust the pH value of manganese sulfate solution to 3, control the volume ratio of P204 extractant and sulfonated kerosene to be 1:5, prepare 1L of organic extractant, and use ammonia water with a concentration of 8mol / L to saponify the organic extractant to form ammonia. Saponified organic phase, wherein the saponification rate is 70%.

[0039] Extraction: use the above-mentioned ammonia saponified organic relative manganese sulfate solution to carry out 5-stage countercurrent extraction to obtain a manganese-rich organic phase and a calcium-magnesium-containing aqueous phase. Wherein, the volume ratio of each level of saponified organic phase to manganese sulfate solution is 3:2, the temperature of each level of extraction is 25°C, and the time of each level of extraction is 5min.

[0040] The first washing: the above-...

Embodiment 2

[0045] The difference between Example 2 and Example 1 is that the manganese sulfate solution in Example 2 contains: 10g / L of Mn 2+ , 0.1g / L of Ca 2+ and 5g / L of Mg 2+ . The calculation shows that the removal rate of calcium ions in the manganese sulfate solution is 99.3%, and the removal rate of magnesium ions is 97.1%.

Embodiment 3

[0047] The difference between Example 3 and Example 1 is that the manganese sulfate solution in Example 3 contains: 50g / L of Mn 2+ , 0.5g / L of Ca 2+ and 20g / L of Mg 2+ . The calculation shows that the removal rate of calcium ions in the manganese sulfate solution is 99.3%, and the removal rate of magnesium ions is 96.9%.

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Abstract

The invention provides a purification treatment method of manganese sulfate solution. The purification treatment method includes: step S1, preparing an extraction organic phase, saponifying the extraction organic phase to obtain a saponified organic phase; step S2, extracting with a saponified organic relative manganese sulfate solution to obtain a manganese-rich organic phase; step S3, using water The manganese-rich organic phase is washed for the first time to obtain a primary purification of the manganese-rich organic phase; in step S4, a strong acid solution containing manganese is used to wash the primary purification of the manganese-rich organic phase for the second time to obtain a secondary purification of the manganese-rich organic phase; And in step S5, the secondary purification manganese-rich organic phase is back-extracted with sulfuric acid to obtain a high-purity manganese sulfate solution and a regenerated organic phase. Since the present application does not need to use pure manganese sulfate to convert the saponified organic phase to manganese saponification, and the used washing liquid is cheap water and manganese-containing strong acid solution, the purification treatment cost is low.

Description

technical field [0001] The invention relates to the technical field of purification of manganese-containing solutions, in particular to a purification treatment method of manganese sulfate solution. Background technique [0002] Manganese and its compounds are one of the important industrial raw materials. In recent years, with the continuous progress of my country's electronic chemicals industry (such as electrolytic manganese, chemical manganese dioxide, magnetic manganese tetroxide and other electronic chemicals with high quality requirements and high purity), as these high-standard electronic chemicals The quality of manganese sulfate, which is the raw material for production, has also attracted much attention. And lithium manganate and ternary materials may replace lithium cobalt oxide as the main battery cathode material in the next few years, and the consumption of manganese sulfate as its main raw material will also increase with the rise of the lithium battery indus...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G45/10
CPCC01G45/10C01G45/003
Inventor 曹敏刘苏宁殷书岩孙宁磊丁剑
Owner CHINA ENFI ENGINEERING CORPORATION
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