Process method for producing high-pure spherical heavy manganese carbonate

A process method, manganese carbonate technology, applied in chemical instruments and methods, manganese compounds, inorganic chemistry, etc., can solve the problems of high energy consumption and price restrictions, high impurity content, etc., and achieve good fluidity, low impurity content, and bulk density big effect

Inactive Publication Date: 2012-11-28
湖北开元化工科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] High-purity spherical heavy manganese carbonate is mainly used in the production of chemical manganese dioxide, which is mainly used in the manufacture of positive electrode materials for dry batteries and rechargeable lithium batteries. High energy consumption and price limit its application in the manufacture of dry batteries and lithium batteries

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Purify the manganese sulfate solution by removing impurities such as calcium, magnesium, iron and other metal ions, prepare a manganese sulfate solution with a concentration of 80g / L; prepare an ammonium bicarbonate solution with a concentration of 60g / L, and fill the ammonium bicarbonate solution with ammonia To generate an ammonium bicarbonate solution; add 10% water and 20% manganese carbonate seed crystals of the total volume of the reactor into a 10L reactor, stir at a stirring speed of 100 rpm, and raise the temperature to 40°C; drop into the reactor at the same time Add the manganese sulfate solution 2000ml prepared in the step a of equimolar ratio and the ammonium bicarbonate solution 1700ml prepared in the step b, make the amount of liquid manganese sulfate and the ammonium bicarbonate amount keep equimolar ratio, control reaction time 4 hours, reaction is finished Finally, after washing with water and suction filtration, the appearance is spherical, the average...

Embodiment 2

[0014] The manganese sulfate solution is purified and purified to remove calcium, magnesium, iron and other metal ions, and the manganese sulfate solution with a concentration of 180g / L is prepared; the ammonium bicarbonate solution with a concentration of 150g / L is prepared, and nitrogen is filled in the ammonium bicarbonate solution To generate an ammonium bicarbonate solution; add 10% water and 30% manganese carbonate seed crystals of the total volume of the reactor into a 10L reactor, stir at a stirring speed of 200 rpm, and raise the temperature to 90°C; drop into the reactor at the same time Add the manganese sulfate solution 2000ml prepared in the step a of equimolar ratio and the ammonium bicarbonate solution 1526ml prepared in the step b, make the amount of liquid manganese sulfate and the ammonium bicarbonate amount keep equimolar ratio, control reaction time 8 hours, reaction is finished Finally, after washing with water and suction filtration, the appearance is sphe...

Embodiment 3

[0016] Purify the manganese sulfate solution to remove metal ions such as calcium, magnesium and iron, and prepare a manganese sulfate solution with a concentration of 140g / L; prepare an ammonium bicarbonate solution with a concentration of 80g / L, and fill the ammonium bicarbonate solution with ammonia Generate ammonium bicarbonate solution; to 10m 3 Add 10% water and 30% manganese carbonate seed crystals of the total volume of the reactor into the reactor, stir and stir at a speed of 150 rpm, and heat up to 80°C; The manganese sulfate solution 2000L of preparation and the ammonium bicarbonate solution 2225L of preparation in the step b, make the amount of adding liquid manganese sulfate and the amount of ammonium bicarbonate keep equimolar ratio, control reaction time 5 hours, after reaction finishes, after washing, suction filtration, obtain The appearance is spherical, the average particle size is 10-20 microns, the manganese content is 44.6% (weight percent), and the tap d...

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Abstract

The invention relates to a process method for producing high-pure spherical heavy manganese carbonate. The process method comprises the following steps of a. preparing a manganese carbonate solution; b. preparing an ammonium hydrogen carbonate solution, filling ammonia into the ammonium bicarbonate solution to form an ammonium bicarbonate solution; c. adding water and crystal seeds of manganese carbonate into a reactor, stirring and heating to a temperature of 40-90 DEG C; and d. dropwise adding a manganese sulfate solution and the ammonium bicarbonate solution with equal molar ratio at the same time into the reactor, controlling reaction time for 4-8 hours, washing and suction filtering, and thus high-pure spherical heavy manganese carbonate is obtained, wherein the heavy manganese carbonate is in spherical shapes; average particle size is 10-20 micrometers; manganese content is larger than 44.5% (weight percentage); a tap density is 2.0-2.4 g / cm3, the content of Ca is no more than 100 PPm; the content of Mg is no more than 150 PPm; and the content of Pb is no more than 50 PPm. The high-pure spherical heavy manganese carbonate prepared by the process has high manganese content of manganese carbonate and low content of impurities. Chemical manganese dioxide produced by the high-pure spherical heavy manganese carbonate can effectively increase chemical performance of batteries.

Description

technical field [0001] The invention relates to the technical field of manganese carbonate preparation, in particular to a process for producing high-purity spherical heavy manganese carbonate. Background technique [0002] High-purity spherical heavy manganese carbonate is mainly used in the production of chemical manganese dioxide, which is mainly used in the manufacture of positive electrode materials for dry batteries and rechargeable lithium batteries. High energy consumption and high price limit its application in the manufacture of dry cells and lithium batteries. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a process for producing high-purity spherical heavy manganese carbonate. The high-purity spherical heavy manganese carbonate produced has high manganese content and low impurity content. The chemical manganese dioxide produced can effectively improve the chemical performance of the battery. [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G45/00
Inventor 高士敬时疆
Owner 湖北开元化工科技股份有限公司
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