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A kind of method utilizing basic salt method to produce fluorine-free ultrapure manganese sulfate monohydrate

A technology of manganese sulfate and basic salt, applied in the direction of manganese sulfate, etc., can solve the problems of rising cost of high-purity manganese sulfate monohydrate and no profit margin for manufacturers, and achieve high production and application value and wide application range of raw materials , the effect of high product quality

Active Publication Date: 2022-06-17
贵州金瑞新材料有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition to the production cost of removing potassium and sodium, the cost of producing high-purity manganese sulfate monohydrate has been rising steadily, causing many manufacturers to have no profit margins, and have withdrawn from the competition in the high-purity manganese sulfate monohydrate industry. The production of manganese sulfate water is even more blank in the market

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  • A kind of method utilizing basic salt method to produce fluorine-free ultrapure manganese sulfate monohydrate

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Effect test

Embodiment 1

[0024] A method for utilizing basic salt method to produce fluorine-free ultrapure manganese sulfate monohydrate, comprising the following steps:

[0025] (1) The preparation mass ratio is 309g of 10% aqueous ammonia solution, dissolved and added 2.8g of EDTA therein, and prepared into a mixed solution of ammonia water and EDTA;

[0026] (2) In 1L of manganese sulfate solution to be removed calcium, magnesium, potassium and sodium, slowly dropwise add the mixed solution prepared in step (1) for manganese precipitation, the precipitation time is 3h, and the temperature is 70°C. After the reaction was completed, the temperature was kept for 45 min. The elemental detection and analysis of the manganese sulfate solution to be removed from calcium, magnesium, potassium and sodium is as follows, Mn 2+ : 100g / L, Ca: 300mg / L, Mg: 250mg / L, K: 150mg / L; Na: 300mg / L. Among them, Ca is the detection result of ICP, and Mg is the detection result of atomic absorption, the same below.

[0...

Embodiment 2

[0031] A method for utilizing basic salt method to produce fluorine-free ultrapure manganese sulfate monohydrate, comprising the following steps:

[0032] (1) The preparation mass ratio is 370 g of 10% ammonia solution, dissolved therein and added 4.7 g of EDTA to prepare a mixed solution of ammonia water and EDTA;

[0033] (2) In 1L of manganese sulfate solution to be removed calcium, magnesium, potassium and sodium, slowly dropwise add the mixed solution prepared in step (1) for manganese precipitation, the precipitation time is 3h, and the temperature is 70°C. After the reaction was completed, the temperature was kept for 45 min. The elemental detection and analysis of the manganese sulfate solution to be removed from calcium, magnesium, potassium and sodium is as follows, Mn 2+ : 120g / L, Ca: 580mg / L, Mg: 300mg / L, K: 300mg / L; Na: 500mg / L

[0034] (3) After the heat preservation, filter while hot, and add 1000 mL of water to rinse.

[0035] (4) Take the precipitation after ...

Embodiment 3

[0038] A method of utilizing basic salt method to produce fluorine-free ultrapure manganese sulfate monohydrate, comprising the following steps:

[0039] (1) The preparation mass ratio is 463g of 10% aqueous ammonia solution, dissolved and added 4.7g of EDTA therein, and prepared into a mixed solution of ammonia solution and EDTA;

[0040] (2) In the manganese sulfate solution to be removed from calcium, magnesium, potassium and sodium, slowly dropwise add the mixed solution prepared in step (1) for manganese precipitation, the manganese precipitation time is 3h, and the temperature is 70°C. After the reaction was completed, the temperature was kept for 45 min. The element detection and analysis in the manganese sulfate solution to be removed from calcium, magnesium, potassium, and sodium are as follows, Mn 2+ : 150g / L, Ca: 550mg / L, Mg: 10g / L, K: 300mg / L; Na: 500mg / L

[0041] (3) After the heat preservation, filter while hot, and add 1000 mL of water to rinse.

[0042] (4) ...

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Abstract

The invention discloses a method for producing fluorine-free ultrapure manganese sulfate monohydrate by using a basic salt method, which belongs to the field of hydrometallurgy and utilizes Mg within the pH range of 8 to 9.5 2+ Ions cannot form Mg(OH) 2 Precipitation, Ca 2+ Ions generate Ca(OH) 2 , Its solubility is relatively large, and the addition of EDTA chelates calcium ions, inhibiting the same ion effect of calcium sulfate when the basic manganese sulfate is precipitated. There is no fluorine pollution in the product, and the contents of calcium, magnesium, potassium and sodium are extremely low. The contents of calcium, magnesium, potassium and sodium in the product are respectively, Ca: 0.00005-0.0005%, Mg: 0.00002-0.0005%, K : 0.00005~0.0002%, Na: 0.00005~0.0002%, far lower than the quality of ultra-pure manganese sulfate monohydrate.

Description

technical field [0001] The invention belongs to a new method for removing calcium, magnesium, potassium and sodium in the field of hydrometallurgy, in particular to a method for producing fluorine-free ultrapure manganese sulfate monohydrate by utilizing a basic salt method. Background technique [0002] my country's manganese salt industry started early, and it has been quite large since the 1950s. The core technology of high-purity manganese sulfate monohydrate is the separation of calcium, magnesium, potassium, sodium and manganese ions, which has always been a technical problem plaguing the hydrometallurgical industry. The production method of ultra-pure manganese sulfate is monopolized by foreign countries and strictly kept secret. At present, the methods of producing high-purity manganese sulfate monohydrate to remove calcium and magnesium mainly include recrystallization, high-temperature crystallization, and fluoride precipitation. The method for removing potassium...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G45/10
CPCC01G45/10C01P2006/80
Inventor 吴海涛唐三川宁孝生时启龙康凯张伟刚黄连平
Owner 贵州金瑞新材料有限责任公司