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Purification method of manganese sulfate solution

A technology of manganese sulfate solution and purification method, which is applied in the direction of manganese sulfate, and can solve the problems of high cost of purification process and low purification rate of manganese sulfate solution

Active Publication Date: 2020-05-22
CHINA ENFI ENGINEERING CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The main purpose of the present invention is to provide a kind of purification method of manganese sulfate solution, to solve the problem that the purification process cost of manganese sulfate solution in the prior art is high, the purification rate of manganese sulfate solution is low

Method used

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Embodiment 1

[0037] Preparation of saponified organic phase: Take 1L of manganese sulfate solution, which contains: 30g / L of 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 The organic phase was saponified, wherein the saponification rate was 70%.

[0038] The first extraction: use the ammonia saponified organic phase to carry out 5-stage countercurrent extraction with the manganese sulfate solution to be purified to obtain a manganese-rich organic phase. Among them, the volume ratio of saponified organic phase to manganese sulfate solution at each stage is 2:1, the extraction temperature at each stage is 25°C, and the extraction time at each stage is 5 minutes.

[0039] The first stripping: using sulfuric acid with a co...

Embodiment 2

[0044] The difference between embodiment 2 and embodiment 1 is that the manganese sulfate solution in embodiment 2 comprises: the Mn of 10g / L 2+ , 0.1g / L of Ca 2+ and 5g / L of Mg 2+ . It can be known by calculation that the removal rate of calcium ions in the manganese sulfate solution is 99.1%, and the removal rate of magnesium ions is 97.2%.

Embodiment 3

[0046] The difference between embodiment 3 and embodiment 1 is that the manganese sulfate solution in embodiment 3 comprises: the Mn of 50g / L 2+ , 0.45g / L of Ca 2+ and 20g / L of Mg 2+ . It can be known by calculation that the removal rate of calcium ions in the manganese sulfate solution is 99.1%, and the removal rate of magnesium ions is 95.5%.

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Abstract

The invention provides a purification method of a manganese sulfate solution. The purification method comprises the following steps: S1, an extracted organic phase is prepared, and the extracted organic phase is saponified to obtain a saponified organic phase; S2, the manganese sulfate solution is extracted for the first time through the saponified organic phase to obtain a manganese-rich organicphase; S3, the manganese-rich organic phase is reversely extracted with sulfuric acid for the first time to obtain a primary purified manganese sulfate solution and a first regenerated organic phase;and S4, the pH value of the primary purified manganese sulfate solution is adjusted, and the primary purified manganese sulfate solution is purified for the second time through the saponified organicphase to obtain a high-purity manganese sulfate solution and a calcium-magnesium-rich organic phase. According to the purification method, no expensive reagent is used for purifying the manganese sulfate solution, the extraction rates of manganese, calcium and magnesium ions are controlled only by controlling the pH value of the solution, the manganese ions are separated from the calcium and magnesium ions accordingly, the purification cost is low, and the purification rate of the manganese sulfate solution is increased through the repeated extraction and reverse extraction process.

Description

technical field [0001] The invention relates to the technical field of purification of manganese-containing solution, in particular to a method for purification of manganese sulfate solution. Background technique [0002] The total amount of manganese resources in my country ranks fourth in the world, but 93% of the reserves are low-grade manganese ores that cannot be directly used by the iron and steel industry. Due to low grade and high impurity content, no economically feasible method of utilization has been found. In order to make full use of my country's low-grade manganese resources, my country's electrolytic manganese metal (electrolytic manganese) industry is developing vigorously. In 2006, my country's electrolytic manganese production reached more than 1 million tons. Manganese in the electrolytic manganese industry uses H 2 SO 4 It is produced by leaching and reducing roasted manganese oxide ore. Since the anolyte (containing impurities) after electrolysis is us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/22C22B47/00C22B3/38C01G45/10
CPCC22B3/22C22B47/00C01G45/10C22B3/3846
Inventor 曹敏孙宁磊刘苏宁彭建华刘国
Owner CHINA ENFI ENGINEERING CORPORATION
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