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Calcium removal method for manganese sulfate solution

A technology of manganese sulfate solution and manganese sulfate, which is applied in the field of metal salt removal of impurities, can solve the problems of environmental friendliness, low cost, and calcium ion removal rate, and achieve low calcium ion removal rate, low cost, and low loss of manganese sulfate Effect

Inactive Publication Date: 2020-07-10
CHINA ENFI ENGINEERING CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The main purpose of the present invention is to provide a method for removing calcium from manganese sulfate solution, so as to solve the problem that environmental friendliness, low cost and calcium ion removal rate cannot be taken into account when removing calcium from manganese sulfate solution in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Determine the actual content of each ion in the manganese sulfate solution by atomic absorption. The manganese ion content in the manganese sulfate solution is Mn80g / L, and the calcium ion content is 0.45g / L. The pH value of the manganese sulfate solution was adjusted to 2 by using sulfuric acid with a mass concentration of 93%.

[0035] (2) Prepare the extracted organic phase, which is composed of extractant P204 and sulfonated kerosene, wherein the volume fraction of P204 is 10%.

[0036] (3) the manganese sulfate solution that adjusts pH value in step (1) is mixed with the extraction organic phase in step (2) and carry out multistage extraction, wherein the O / A ratio of extraction organic phase and manganese sulfate liquid is 1.5:1, Using 30-stage countercurrent extraction, the extraction temperature is 30°C, the calcium and a small amount of manganese in the manganese sulfate solution enter the extracted organic phase to form a calcium-manganese-rich organic pha...

Embodiment 2

[0040] (1) Determine the actual content of each ion in the manganese sulfate solution by atomic absorption. The manganese ion content in the manganese sulfate solution is Mn80g / L, and the calcium ion content is 0.45g / L. The pH value of the manganese sulfate solution was adjusted to 0.5 with 93% sulfuric acid.

[0041] (2) Prepare the extracted organic phase, which is composed of extractant P204 and sulfonated kerosene, wherein the volume fraction of P204 is 30%.

[0042] (3) the manganese sulfate solution that adjusts pH value in step (1) is mixed with the extraction organic phase in step (2) and carry out multistage extraction, wherein the O / A ratio of extraction organic phase and manganese sulfate liquid is 1.5:1, Using 30-stage countercurrent extraction, the extraction temperature is 30°C, the calcium and a small amount of manganese in the manganese sulfate solution enter the extracted organic phase to form a calcium-manganese-rich organic phase, and the manganese ions will...

Embodiment 3

[0046] (1) Determine the actual content of each ion in the manganese sulfate solution by atomic absorption. The manganese ion content in the manganese sulfate solution is Mn80g / L, and the calcium ion content is 0.45g / L. The pH value of the manganese sulfate solution was adjusted to 3 with 93% sulfuric acid.

[0047] (2) Prepare the extracted organic phase, which is composed of extractant P204 and sulfonated kerosene, wherein the volume fraction of P204 is 5%.

[0048] (3) the manganese sulfate solution that adjusts pH value in step (1) is mixed with the extraction organic phase in step (2) and carry out multistage extraction, wherein the O / A ratio of extraction organic phase and manganese sulfate liquid is 1.5:1, Using 30-stage countercurrent extraction, the extraction temperature is 30°C, the calcium and a small amount of manganese in the manganese sulfate solution enter the extracted organic phase to form a calcium-manganese-rich organic phase, and the manganese ions will re...

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Abstract

The invention provides a calcium removal method for a manganese sulfate solution. The manganese sulfate solution contains impurity calcium ions. The method comprises the following steps: adjusting thepH value of the manganese sulfate solution to 0.5-3; mixing an extraction agent P204 with sulfonated kerosene to obtain an extraction organic phase, the volume concentration of the extraction agent P204 being 5-30%; extracting the manganese sulfate solution by adopting the extraction organic phase to obtain a manganese sulfate calcium-removed raffinate and a calcium-manganese-rich organic phase;carrying out multistage reverse extraction on the calcium-manganese-rich organic phase to obtain a reverse extraction water phase and a reverse extraction organic phase; and carrying out evaporative crystallization on the reverse extraction water phase to obtain a manganese sulfate solid. The process provided by the invention is used for removing calcium from the manganese sulfate solution, givesconsideration to environmental friendliness, low cost and calcium ion removal rate, and has a wide application prospect.

Description

technical field [0001] The invention relates to the technical field of metal salt removal of impurities, in particular to a method for removing calcium from a manganese sulfate solution. Background technique [0002] In recent years, the demand for manganese and its compound products has increased sharply in the market. High-purity manganese sulfate is mainly used for smelting high-grade ferromanganese alloy, electrolytic manganese metal of manganese-copper alloy; for making other manganese salts, manganese borate, manganese nitrate, manganese chloride, etc. are all produced based on high-purity manganese sulfate; It is used to provide raw materials for electrolytic or chemical manganese dioxide for high-grade batteries, high-purity manganese carbonate and trimanganese tetraoxide for soft ferrite materials. Among the many functions, the application of high-purity manganese sulfate in the synthesis of lithium-nickel-cobalt-manganese-oxygen ternary cathode materials and lithi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G45/10
CPCC01G45/10C01G45/003C01P2006/80
Inventor 刘诚曹敏孙宁磊付国燕刘国
Owner CHINA ENFI ENGINEERING CORPORATION
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