Preparation method of manganous-manganic oxide

A technology of trimanganese tetraoxide and manganese dioxide, which is applied in the direction of manganese oxide/manganese hydroxide, can solve the problems of low purity and poor quality stability of trimanganese tetraoxide, and achieve good iron removal effect, good crystallization, and raw materials Easy to get effect

Inactive Publication Date: 2020-01-17
四川中哲新材料科技有限公司
View PDF10 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The manganese sulfate method uses Mn 2+ Precipitates to Mn(OH) under alkaline conditions 2 , and then oxidize it by an oxidant to obtain trimanganese tetraoxide; the main disadvantage of this method is that the prepared trima

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A preparation method of trimanganese tetraoxide, comprising the following steps:

[0028] Leaching: In the titanium reaction tank, grind manganese carbonate ore into powder and mix it with manganese dioxide, add sulfuric acid, manganese carbonate ore powder: sulfuric acid: manganese dioxide = 1:2:0.3, the reaction temperature is 80°C, the time is 3h, and the reaction ends , filter, collect the filtrate, wash the filter cake, combine the filtrate and the washing liquid to obtain the leachate; in order to avoid the overflow of toxic hydrogen sulfide gas, add manganese dioxide as an oxidant to oxidize the sulfur ions into simple sulfur, and the leaching rate of manganese element can reach 98.57%.

[0029] Neutralization: Add manganese dioxide to the leaching solution at a temperature of 90°C; react for 1 hour, and use manganese dioxide as an oxidant to oxidize ferrous ions in the solution to ferric ions. After the reaction, adjust the pH to 6 with lime, filter and deionize...

Embodiment 2

[0036] A preparation method of trimanganese tetraoxide, comprising the following steps:

[0037] Leaching: In the titanium reaction tank, grind manganese carbonate ore into powder and mix it with manganese dioxide, add sulfuric acid, manganese carbonate ore powder: sulfuric acid: manganese dioxide = 1:2.5:0.3, the reaction temperature is 85°C, the time is 4h, and the reaction ends , filter, collect the filtrate, wash the filter cake, combine the filtrate and the washing liquid to obtain the leachate; in order to avoid the overflow of toxic hydrogen sulfide gas, add manganese dioxide as an oxidant to oxidize the sulfur ions into simple sulfur, and the leaching rate of manganese element can reach 98.65%.

[0038] Neutralization: Add manganese dioxide to the leaching solution at a temperature of 105°C; react for 2 hours, and use manganese dioxide as an oxidant to oxidize ferrous ions in the solution to iron ions. After the reaction, adjust the pH to 6.5 with lime, filter and deio...

Embodiment 3

[0045] A preparation method of trimanganese tetraoxide, comprising the following steps:

[0046] Leaching: Grind manganese carbonate ore into powder and mix it with manganese dioxide in a titanium reaction tank, add sulfuric acid, manganese carbonate ore powder: sulfuric acid: manganese dioxide = 1:3:0.5, the reaction temperature is 90°C, the time is 5h, and the reaction ends , filter, collect the filtrate, wash the filter cake, combine the filtrate and the washing liquid to obtain the leachate; in order to avoid the overflow of toxic hydrogen sulfide gas, add manganese dioxide as an oxidant to oxidize the sulfur ions into simple sulfur, and the leaching rate of manganese element can reach 98.47%.

[0047] Neutralization: Add manganese dioxide to the leaching solution at a temperature of 100°C; react for 2 hours, and use manganese dioxide as an oxidant to oxidize ferrous ions in the solution to ferric ions. After the reaction, adjust the pH to 6.8 with lime, filter and deioniz...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a preparation method of manganous-manganic oxide, and belongs to the technical field of manganese compound synthesis. The preparation method comprises the following steps: leaching, namely grinding manganese carbonate ore into powder, reacting with manganese dioxide and sulfuric acid, and filtering; neutralizing, namely adding manganese dioxide, adjusting the pH value to 6-7 with lime, and filtering; removing heavy metals, namely adding barium sulfide, and filtering; removing calcium and magnesium, namely adding ammonium fluoride into a solution obtained after heavy metal removing, and filtering; purifying, namely filtering by using a chemical manganese dioxide filter layer; carrying out hydrolysis precipitation, namely slowly adding the purified solution into ammonia water, continuously stirring, carrying out suction filtration, and carrying out vacuum drying on a filter cake; and carrying out oxidation,namely preparing a suspension from the dried filter cake,introducing hot air, dropwise adding ammonia water, carrying out suction filtration, and carrying out vacuum drying to obtain manganous-manganic oxide. According to the method, the high-purity manganous-manganic oxide is prepared by removing impurities through a chemical method, purifying and then directly oxidizing, so that the manganous-manganic oxide is directly prepared from manganese carbonate ore, the process is simple, the preparation cost is low, and the prepared manganous-manganic oxide is high in purity and stable in quality.

Description

technical field [0001] The invention belongs to the technical field of manganese compound synthesis, in particular to a preparation method of trimanganese tetraoxide. Background technique [0002] Trimanganese tetraoxide is a high-performance structural material, mainly used in the electronics industry. It is one of the important raw materials required for the production of soft ferrite, and it is also a high-quality raw material for the preparation of manganese-zinc ferrite. Mn 3 o 4 The prepared soft ferrite accounts for more than 60% of the total soft ferrite. [0003] In recent years, trimanganese tetraoxide has entered the battery field and is used as the positive electrode material lithium manganese oxide (LiMn 2 o 4 ) The raw material for the preparation of the electrode is a better one among many raw materials for synthesizing the spinel structure lithium manganese oxygen positive electrode active material, by (Mn 3 o 4 ) The lithium manganese oxide material obt...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C01G45/02
CPCC01G45/02
Inventor 范强
Owner 四川中哲新材料科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap