Method for synthesizing spherical manganese carbonate by use of ionic liquid

A technology of ionic liquid and manganese carbonate, which is applied in the production of chemical instruments and methods, manganese compounds, and bulk chemicals, can solve the problems of less research on product morphology control, and achieve low operating costs, low energy consumption, and synthetic processes simple effect

Active Publication Date: 2015-06-24
DALIAN RUIYUANPOWER CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Preparation of MnCO from Inexpensive Manganese Salt and Carbonate Precipitation 3 It has the advantage of low cost, so it has become the preparation of MnCO in recent years 3 The main research direction, but more focus on the influence of reaction conditions on product purity and particle size, less research on product shape control

Method used

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  • Method for synthesizing spherical manganese carbonate by use of ionic liquid
  • Method for synthesizing spherical manganese carbonate by use of ionic liquid
  • Method for synthesizing spherical manganese carbonate by use of ionic liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1 Step 1: Add ionic liquid (1-ethyl-3-methylimidazolium bromide [EMIM] Br), manganese sulfate monohydrate, ammonium bicarbonate, and water into a beaker at a mass ratio of 6:2:1:10, at 20°C After stirring and reacting for 20 minutes, filter, wash and separate to obtain manganese carbonate, and collect carbon dioxide simultaneously;

[0025] In the second step, the product manganese carbonate is dehydrated and vacuum-dried at 60°C for 6 h (vacuum degree is 0.0868MPa) to obtain a spherical manganese carbonate product.

[0026] In the third step, the washed filtrate is subjected to simple distillation to remove water, and the solid ammonium sulfate, manganese sulfate mixture and ionic liquid are centrifuged again. The ionic liquid, ammonium sulfate and manganese sulfate mixture were recovered separately.

[0027] The product synthesized under this condition is characterized by morphology, structure and particle size, and the product is D 50 =1.256μm, spherical ...

Embodiment 2

[0028] Example 2 In the first step, ionic liquid ([EMIM]Br), manganese sulfate monohydrate, ammonium bicarbonate, and water are added into a beaker at a mass ratio of 7:2:1:9, stirred and reacted at 20°C for 20 minutes, filtered and washed with water to obtain manganese carbonate, while collecting carbon dioxide;

[0029] In the second step, the product manganese carbonate is dehydrated and vacuum-dried at 60°C for 6 h (vacuum degree is 0.0868MPa) to obtain the manganese carbonate product.

[0030] In the third step, the washed filtrate is subjected to simple distillation to remove water, and the solid ammonium sulfate, manganese sulfate mixture and ionic liquid are centrifuged again. The ionic liquid, ammonium sulfate and manganese sulfate solid mixtures were recovered separately.

[0031] The product synthesized under this condition is characterized by morphology, structure and particle size, and the product is D 50 =1.125μm, spherical particles of manganese carbonate wi...

Embodiment 3

[0032] Example 3 In the first step, ionic liquid ([EMIM]Br), manganese sulfate monohydrate, ammonium bicarbonate, and water are added into a beaker at a mass ratio of 8:2:1:8, stirred and reacted at 20°C for 20 minutes, filtered, washed and separated to obtain manganese carbonate, while collecting carbon dioxide;

[0033] In the second step, the product manganese carbonate is dehydrated and vacuum-dried at 60°C for 6 h (vacuum degree is 0.0868MPa) to obtain the manganese carbonate product.

[0034] In the third step, the washed filtrate is subjected to simple distillation to remove water, and the solid ammonium sulfate, manganese sulfate mixture and ionic liquid are centrifuged again. The ionic liquid, ammonium sulfate and manganese sulfate solid mixtures were recovered separately.

[0035] The product synthesized under this condition is characterized by morphology, structure and particle size, and the product is D 50 =1.030μm, spherical particles of manganese carbonate wi...

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Abstract

The invention provides a method for synthesizing spherical manganese carbonate by use of an ionic liquid. The method comprises the following steps: mixing an imidazole type ionic liquid, manganese sulfate monohydrate, ammonium bicarbonate and water together in the mass ratio of (6-9): (1-2): (1-2): (7-10), stirring for reacting at a reaction temperature ranging from 20-30 DEG C for 20-30 min, and meanwhile, collecting CO2 generated in the reaction process, after the reaction is ended, performing solid-liquid separation to obtain a solid and a filtrate, washing the solid, and drying in vacuum to obtain the spherical manganese carbonate product. Besides, the obtained filtrate is distilled and separated and then the ionic liquid and the solid are recovered, respectively; and the solid is ammonium sulfate or a sulfate mixture. According to the method, the imidazole type ionic liquid and water are taken as the solvents, and the imidazole type ionic liquid also serves as a template agent and is capable of controlling the precipitation reaction to obtain the spherical submicron-order manganese carbonate. The method is simple in synthesis process, and low in equipment and process operating costs; and the CO2, the ionic liquid and the ammonium sulfate or the sulfate mixture can be recycled to meet the requirement of green production.

Description

technical field [0001] The present invention relates to the preparation method of manganese carbonate. In particular, it relates to a method for synthesizing spherical manganese carbonate from an ionic liquid. Background technique [0002] Spherical MnCO with uniform particle size distribution 3 Widely used in many high-tech fields such as electronics, ceramics, medicine, and catalysts, spherical MnCO 3 Preparation of spherical lithium-ion battery cathode material LiMn with uniform particle size distribution 2 o 4 , has good electrochemical performance and processing performance. Therefore, MnCO 3 The shape control technology has been paid more and more attention. Preparation of MnCO from Inexpensive Manganese Salt and Carbonate Precipitation 3 It has the advantage of low cost, so it has become the preparation of MnCO in recent years 3 The main research direction, but more focus on the influence of reaction conditions on product purity and particle size, less resear...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G45/00
CPCY02P20/54
Inventor 刘胜洋徐瑞全
Owner DALIAN RUIYUANPOWER CO LTD
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