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Method for preparing hydrated manganese sulfate

A technology of monohydrate sulfuric acid and solution, applied in the directions of manganese sulfate, separation methods, chemical instruments and methods, etc., can solve the problem of MnO not using methods, etc., and achieve the effect of solving production capacity constraints and improving production capacity.

Active Publication Date: 2010-09-22
GUIZHOU REDSTAR DEVING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, no matter at home or abroad, there is no effective utilization method for MnO with a weight percentage content of less than 20%.

Method used

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  • Method for preparing hydrated manganese sulfate
  • Method for preparing hydrated manganese sulfate
  • Method for preparing hydrated manganese sulfate

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Get the MnO (weight content 17.51%) that 1500gBa-Mn is combined (namely manganese dioxide ore powder and BaS solution reaction) to obtain and place in 5000mL beaker, add concentration and be 147g / L (NH 4 ) 2 SO 4 The solution was 3490mL, heated and reacted under stirring, the gas produced was recovered by a secondary bubbling absorption device, the device was heated to 100°C for 60 minutes, and the heating was stopped;

[0030] Separate the above solution by suction filtration, rinse the funnel with a small amount of deionized water, combine the filtrates, and measure MnSO 4 The concentration of the solution is 221.8g / L and the volume is 2443mL. Adding concentration under stirring is 1.47mol / L (NH 4 ) 2 S solution 2441ml equimolar reaction, keep stirring for 30 minutes, then separate by suction filtration, discard the filtrate, wash the filter cake with 60°C hot water, 1:5 ratio of material to water, wash for 2 hours, separate by suction filtration, discard the filtr...

Embodiment 2

[0033] The MnO (9.71% by weight) obtained by 1500g Ba-Sr combination (that is, the reaction of manganese dioxide ore powder and SrS solution) is placed in a 5000mL beaker, and the concentration of 130g / L (NH 4 ) 2 SO 4 The solution was 2084mL, heated and reacted under stirring, the gas generated was recovered by a secondary bubbling absorption device, the temperature of the device was raised to 100°C and maintained for 30 minutes, and the heating was stopped.

[0034] Separate the above solution by suction filtration, rinse the funnel with a small amount of deionized water, combine the filtrates, and measure MnSO 4 The concentration of the solution is 206.1mol / L, the volume is 1458mL, and the (NH4) concentration of 1.52mol / L is added under stirring 2 S solution 1309ml equimolar reaction, keep stirring for 30 minutes, then separate by suction filtration, discard the filtrate, wash the filter cake with 80°C hot water, 1:4 ratio of material to water for 2 hours, separate by suc...

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Abstract

The invention discloses a method for preparing hydrated manganese sulfate, which comprises the following steps of: performing a heating reaction on MnO and (NH4)2SO4 solution, and performing solid-liquid separation on the obtained products; measuring the concentration of MnSO4 in the obtained solution, adding ammonium sulfate solution and the like into the solution with stirring to perform a molar reaction, performing solid-liquid separation on the obtained products, and washing a solid phase; dissolving the obtained solid phase by using concentrated sulfuric acid; adding hydrogen peroxide into the obtained solution, heating and boiling the mixture, and adjusting the pH of the solution to 5 to 6; accurately filtering the mixture to filter off the solid phase part; and evaporating and drying the filtrate to obtain a MnSO4.H2O product. Through the reaction of the MnO and the (NH4)2SO4 and the treatment on the generated manganese sulfate solution by process steps of sulfurization and the like, the method reduces the quantity of byproducts while separating impurities, improves the productivity of manganese sulfate, and creates a condition for large-scale industrial production of the MnSO4.H2O product.

Description

technical field [0001] The invention relates to a method for preparing manganese sulfate monohydrate, in particular to a method for preparing manganese sulfate monohydrate by using MnO. Background technique [0002] MnSO 4 ·H 2 O is usually used in the preparation of cathode materials for automotive power batteries. During the application process, the MnSO 4 ·H 2 The content of impurity ions in O such as: K, Na, Ca, Mg, Fe and various heavy metal ions has higher requirements. Existing technology to produce MnSO 4 ·H 2 O method, in order to carry out impurity separation will be accompanied by a large amount of by-products, such as: BaSO 4 etc. These by-products have a certain market capacity, but compared with the needs of automotive power batteries, the total market demand for this part of by-products is small, so it is urgent to design a method with higher production capacity to prepare MnSO 4 ·H 2 O products. [0003] MnO in nature 2 Ores are generally divided in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G45/10
CPCC01G45/10B01D1/00B01D61/38
Inventor 姜志光华东
Owner GUIZHOU REDSTAR DEVING
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