Extraction agent capable of effectively improving manganese extraction effect and extraction method

An extraction agent and extraction technology, applied in the field of non-ferrous metallurgy, can solve the problems of low manganese extraction rate and poor selectivity, and achieve effective separation, good selectivity, and improved extraction rate

Inactive Publication Date: 2013-05-29
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention aims to provide a kind of extractant, is used in the manganese sulfate solution containing calcium and magnesium to improve the extraction effect of mangane

Method used

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  • Extraction agent capable of effectively improving manganese extraction effect and extraction method
  • Extraction agent capable of effectively improving manganese extraction effect and extraction method
  • Extraction agent capable of effectively improving manganese extraction effect and extraction method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Effect of adding tributyl phosphate (TBP) to high sterically hindered β-diketone on the extraction rate of manganese, calcium and magnesium from manganese sulfate solution containing calcium and magnesium

[0027] Add TBP to high sterically hindered β-diketone (with the structure described in the extractant mentioned in the "Summary of the Invention", R is an alkyl group with 6 carbon atoms, referred to as β-diketone) to form an extractant (wherein β - The molar ratio of diketone to TBP is 1:1 to 1:0), using sulfonated kerosene as diluent to prepare the extractant to a concentration of 15% to 35% to form an organic phase (ie oil phase). Manganese sulfate solution containing calcium and magnesium is prepared as the extracted water phase, and its Mn 2+ The concentration is 20~40g.L -1 range, Ca 2+ and Mg 2+ The concentration is 500~1000mg.L -1 range, the pH value is 3.0-6.0. Extraction operation: add the oil phase and the extracted water phase into a 250ml conical fl...

Embodiment 2

[0033] Example 2 The effect of adding n-octanol on the extraction rate of manganese, calcium and magnesium in the manganese sulfate solution containing calcium and magnesium to the high steric hindrance β-diketone

[0034] Add n-octanol to high sterically hindered β-diketone (with the structure described in the extractant mentioned in the "Summary of the Invention", R is an alkyl group with 10 carbon atoms, referred to as β-diketone) to form an extractant ( Among them, the molar ratio of β-diketone to n-octanol is 1:1~1:0), using sulfonated kerosene or 260# solvent oil as diluent to prepare the extractant to a concentration of 15%~35% to form an organic phase ( the oil phase). Manganese sulfate solution containing calcium and magnesium is prepared as the extracted water phase, and its Mn 2+ The concentration is 20~40g.L -1 range, Ca 2+ and Mg 2+ The concentration is 500~1000mg.L -1 The range of pH is 3.0 to 6.0. Extraction operation: Add the oil phase and the extracted w...

Embodiment 3

[0040] Example 3 Effect of adding tri-n-octylphosphine oxide (TOPO) to high sterically hindered β-diketone on the extraction rate of manganese, calcium and magnesium in manganese sulfate solution containing calcium and magnesium

[0041] Add tri-n-octylphosphine oxide ( TOPO) to form an extractant (wherein the molar ratio of β-diketone to TOPO is 1:1 to 1:10), using sulfonated kerosene as a diluent to prepare the extractant to a concentration of 15% to 35% to form an organic phase (ie oil phase). Manganese sulfate solution containing calcium and magnesium is prepared as the extracted water phase, and its Mn 2+ The concentration is 20~40g.L -1 range, Ca 2+ and Mg 2+ The concentration is 500~1000mg.L -1 The range of pH is 3.0 to 6.0. Extraction operation: Add the oil phase and the extracted water phase into a 250ml conical flask with a stopper, then put the conical flask into a super constant temperature shaker for 30 minutes, and pour the mixture in the conical flask Int...

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Abstract

The invention relates to an extraction agent capable of effectively improving manganese extraction effect and an extraction method. A compounded system formed by high steric hindrance beta-diketone and neutral lewis alkali synergist is used as an extraction agent for extracting a manganese sulphate solution containing calcium and manganese ions, and extraction rate of calcium and manganese is reduced while the extraction rate of manganese is obviously increased, so that effective separation of manganese, calcium and magnesium is realized. The neutral Lewis alkali is one of n-octyl alcohol, tributyl phosphate (TBP) and n-octyl phosphine oxide (TOPO). According to the extraction agent, under the condition of introducing no foreign ion, after extraction is finished, a sulphuric acid solution is utilized for carrying out two-stage cross flow reverse extraction on a load magnesium organic phase obtained by extraction, so as to obtain a manganese sulphate mother solution with higher purity, and then concentration and crystallization are carried out to obtain manganese sulphate, wherein the calcium content and the magnesium content in the manganese sulphate product are less than 10ppm, so that the requirement of battery-level high-purity manganese sulphate to the calcium content and the magnesium content can be met.

Description

technical field [0001] The invention relates to a nonferrous metal metallurgy method, in particular to an extraction agent and an extraction method which can effectively improve the extraction effect of manganese in a manganese sulfate solution containing calcium and magnesium. Background technique [0002] The main process of producing battery-grade high-purity manganese sulfate from manganese ore is "sulfuric acid leaching - purification and iron removal - purification and removal of heavy metals - purification and removal of calcium and magnesium - concentrated crystallization" (Tan Zhuzhong, Mei Guanggui, Li Weijian, etc. Manganese Metallurgy (First Edition) [M].Changsha: Central South University Press, 2004:668-669), because Ca in the leachate 2+ and Mg 2+ The removal of is very difficult, and the Ca 2+ and Mg 2+ The degree of removal of manganese sulfate is directly related to whether the manganese sulfate product can meet the quality requirements of battery-grade h...

Claims

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Application Information

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IPC IPC(8): C22B3/40C22B47/00
Inventor 胡慧萍廖俊梅谭力铭
Owner CENT SOUTH UNIV
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