Method for removing calcium ions from manganese sulfate solution

A manganese sulfate solution and calcium ion technology, applied in the field of hydrometallurgy, can solve problems such as wasting manganese resources, and achieve the effects of improving quality, saving energy and auxiliary materials, and improving metal yield

Inactive Publication Date: 2019-02-26
JILIN JIEN NICKEL IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] New energy materials are the future development direction of batteries. Materials such as nickel sulfate, cobalt sulfate, and manganese sulfate used in lithium batteries have become the new favorites of the chemical industry. The production of nickel sulfate and cobalt sulfate from laterite nickel mines has also become one of the classic processes. The production of nickel sulfate In the process, because the raw materials contain a large amount of manganese and other impurities, manganese sulfate and other impurities cannot be separated, and they are mostly discharged as waste liquid, which greatly wastes manganese resources. If the manganese in the manganese sulfate waste liquid can be separated, it will save resources. Increased economic benefits

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  • Method for removing calcium ions from manganese sulfate solution

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Effect test

Embodiment 1

[0031] In this example, before extraction: the pH value of the aqueous phase is 1.0 to 2.0, the calcium ion content in the aqueous phase is 0.4 g / L, the manganese ion content is 20 g / L, and the bis(2,4,4 trimethyl The concentration of pentyl) phosphinic acid is 15%, and the saponification rate is 40%; in the extraction reaction process: the extraction ratio is 4.5:1, the washing ratio is 1:8, and the stripping ratio is 1:15, the extraction, In the three stages of washing and stripping, the reaction temperature is 35°C, the reaction time is 3 minutes, and the rotation speed of the stirring paddle is controlled at 300 rpm; after multi-stage countercurrent extraction, washing and stripping, the manganese sulfate solution: pH The value is 2.5, the manganese ion content is 70g / L, and the calcium ion content is 0.01g / L.

Embodiment 2

[0033] In this example, before extraction: the pH value of the aqueous phase is 1.0 to 2.0, the calcium ion content in the aqueous phase is 0.5 g / L, the manganese ion content is 25 g / L, and the bis(2,4,4 trimethyl The concentration of pentyl) phosphinic acid is 15%, and the saponification rate is 50%; in the extraction reaction process: the extraction ratio is 5:1, the washing ratio is 1:6, and the stripping ratio is 1:18, the extraction, In the three stages of washing and stripping, the reaction temperature is 35°C, and the reaction time is 3 minutes; the rotation speed of the stirring paddle is controlled at 300 rpm; after multi-stage countercurrent extraction, washing and stripping, multi-stage countercurrent extraction , After washing and stripping, manganese sulfate solution: pH value is 2.2, manganese ion content is 90g / L, calcium ion content is 0.012g / L.

Embodiment 3

[0035] In this example, before extraction: the pH value of the aqueous phase is 1.0 to 2.0, the calcium ion content in the aqueous phase is 0.3 g / L, the manganese ion content is 30 g / L, and the bis(2,4,4 trimethyl The concentration of pentyl) phosphinic acid is 15%, and the saponification rate is 50%; in the extraction reaction process: the extraction ratio is 6:1, the washing ratio is 1:8, and the stripping ratio is 1:20, the extraction, In the three stages of washing and stripping, the reaction temperature is 35°C, the reaction time is 3 minutes, and the rotation speed of the stirring paddle is controlled at 300 rpm; after multi-stage countercurrent extraction, washing and stripping, multi-stage countercurrent extraction , After washing and stripping, manganese sulfate solution: pH value is 2.8, manganese ion content is 98g / L, calcium ion content is 0.008g / L.

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Abstract

The invention discloses a method for removing calcium ions from a manganese sulfate solution, and belongs to the technical field of hydrometallurgy. According to the method, a calcium-containing manganese sulfate solution is taken as a raw material, an extraction agent, namely bi(2,4,4trimethylamyl) phosphinic acid, with a certain concentration is taken as an organic phase, a manganese sulfate solution is taken as an aqueous phase and multistage countercurrent extraction is carried out, wherein strip liquor is a relatively-pure manganese sulfate solution with extremely-low impurity content andcan be used for directly preparing a battery grade manganese sulfate product. The organic phase is recycled after being washed and regenerated. The method has the advantages of short process flow, fast onset, low cost, low consumption of auxiliary materials and power, high labor production efficiency, clean production process, no pollution and the like.

Description

technical field [0001] The invention belongs to the technical field of hydrometallurgy, and in particular relates to a method for removing calcium ions from a manganese sulfate solution by using an extraction and separation method to purify the manganese ions in the manganese sulfate solution, thereby preparing high-purity battery-grade manganese sulfate. Background technique [0002] New energy materials are the future development direction of batteries. Materials such as nickel sulfate, cobalt sulfate, and manganese sulfate used in lithium batteries have become the new favorites of the chemical industry. The production of nickel sulfate and cobalt sulfate from laterite nickel mines has also become one of the classic processes. The production of nickel sulfate In the process, because the raw materials contain a large amount of manganese and other impurities, manganese sulfate and other impurities cannot be separated, and most of them are discharged as waste liquid, which gre...

Claims

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Application Information

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IPC IPC(8): C01G45/10
CPCC01G45/003C01G45/10
Inventor 闻松张宝剑孟庆伟刘海宁王英凯马富龙高严
Owner JILIN JIEN NICKEL IND
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