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Manganese chloride and preparation method thereof

A technology of manganese chloride and ammonium chloride solution, which is applied to manganese halides, electrochemical generators, electrical components, etc., and can solve the problems of high power consumption in production

Inactive Publication Date: 2013-12-11
GUIZHOU REDSTAR DEVING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The process of preparing manganese chloride by metal manganese has the characteristics of simple and mature process, but the production of manganese chloride by metal manganese has high power consumption

Method used

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  • Manganese chloride and preparation method thereof

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preparation example Construction

[0026] A preparation method of manganese chloride, the method comprising:

[0027] (1) Metathesis reaction

[0028] According to Mn 2+ with NH 4+ The molar ratio of the manganese oxide is 1:2.4~2.8, mix the manganous oxide and the ammonium chloride solution, and then heat the reaction at 85-90°C for 2-3 hours.

[0029] The chemical reaction equation involved in this step is: NH produced by absorption 3 The gas is used in the production of high-purity barium carbonate.

[0030] This manganous oxide can be conventional commercially available manganous oxide, and also can be the manganous oxide that barium manganese combines technology to obtain, specifically will [Ba 2+ ] is 0.70~1.5mol / L BaS solution molar ratio is manganese:sulfur=1:1~1.1 Add manganese oxide ore powder to react, control the temperature of the reaction system in the range of 60~90°C, and the reaction time is controlled at 1~ After 2.5 hours, solid-liquid separation was carried out after the reaction, and...

Embodiment 1

[0049] (1) Metathesis reaction

[0050] According to Mn 2+ with NH 4+ The molar ratio of the manganese oxide is 1:2.4, mix the manganous oxide and the ammonium chloride solution, and then heat the reaction at 85°C for 2 hours.

[0051] (2) Impurity removal

[0052] According to [Fe 2+ ] / [S 2- ]=1 / 1.05 molar ratio, add 100g / L barium sulfide solution to the reaction solution after heating reaction in step (1), and stir for 60 minutes.

[0053] According to [Ba 2+ ] / [SO 4 2- ] equal molar ratio, add industrial ammonium sulfate in the reaction solution, then continue to add ammonium sulfate to make [SO 4 2- ]≥0.05mol / L, stirred and reacted for 30 minutes, separated by pressure filtration, discarded after washing the filter residue, and the obtained filtrate was sent to the next step.

[0054] (3) Refining, evaporation, crystallization

[0055] Acidify the filtrate obtained in step (2) to pH 4 with industrial hydrochloric acid, add hydrogen peroxide and heat to boil for ...

Embodiment 2

[0059] (1) Metathesis reaction

[0060] According to Mn 2+ with NH 4+ The molar ratio is 1:2.6, manganous oxide and ammonium chloride solution are mixed, and then heated at 87°C for 2.5 hours.

[0061] (2) Impurity removal

[0062] According to [Fe 2+ ] / [S 2- ]=1 / 1.2 molar ratio, add 120g / L barium sulfide solution to the reaction solution after heating reaction in step (1), and stir for 75 minutes.

[0063] According to [Ba 2+ ] / [SO 4 2- ] equal molar ratio, add industrial ammonium sulfate in the reaction solution, then continue to add ammonium sulfate to make [SO 4 2- ]≥0.05mol / L, stirred and reacted for 45 minutes, separated by pressure filtration, discarded after washing the filter residue, and the obtained filtrate was sent to the next step.

[0064] (3) Refining, evaporation, crystallization

[0065] Acidify the filtrate obtained in step (2) to pH 3.5 with industrial hydrochloric acid, add hydrogen peroxide and heat to boil for 45 minutes, then NH 3 Adjust the...

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Abstract

The invention provides manganese chloride and a preparation method thereof. The preparation method comprises the following steps of: (1) carrying out double-decomposition reaction, namely, mixing manganous oxide and an ammonium chloride solution in the molar ratio of Mn2+ to NH4+ being 1: (2.4-2.8), and then carrying out heating reaction for 2 to 3 hours at 85-90 DEG C; (2) removing impurities; (3) refining, evaporating and crystallizing; (4) obtaining finished products. According to the preparation method, the special manganese chloride product for a ternary anode material is prepared through the double decomposition of the manganous oxide and the ammonium chloride, and the product cost is reduced.

Description

technical field [0001] The invention relates to the field of lithium ion secondary battery materials, in particular to a special manganese chloride material for lithium ion secondary batteries and a preparation method thereof. Background technique [0002] Manganese raw materials used in the preparation of ternary cathode material precursors mainly include manganese sulfate, manganese carbonate and manganese chloride. The process for preparing manganese chloride by metallic manganese has the characteristics of simple and mature process, but the production of manganese chloride by metallic manganese requires high power consumption. Contents of the invention [0003] The technical problem to be solved by the present invention is: to overcome the defect of high power consumption in the production of manganese chloride produced by the existing metal manganese, and provide a kind of manganese chloride and its preparation method, through the double decomposition of manganous oxi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G45/06H01M10/0525
CPCY02E60/122Y02E60/10
Inventor 姜志光华东刘湘玉张波张立逢
Owner GUIZHOU REDSTAR DEVING
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