Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method of high-purity vanadium pentoxide

A vanadium pentoxide, high-purity technology, applied in the field of high-purity vanadium pentoxide preparation, can solve the problems that the purity of vanadium pentoxide cannot meet the requirements, the adsorption rate of vanadium solution is not high, and the regeneration rate of resin is not high. Avoid the effects of low resin regeneration rate, avoid secondary pollution, and reduce production costs

Inactive Publication Date: 2016-12-21
陕西华源矿业有限责任公司
View PDF3 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a method for preparing high-purity vanadium pentoxide to solve the problem that the purity of vanadium pentoxide cannot meet the requirements in the prior art
[0006] Still another object of the present invention is to provide a method for preparing high-purity vanadium pentoxide, so as to solve the problem of high risk of required drugs, easy to cause environmental pollution and high cost when extracting vanadium by solvent extraction in the prior art
[0007] Still another object of the present invention is to provide a kind of preparation method of high-purity vanadium pentoxide, to solve the problems of low resin regeneration rate, low vanadium solution adsorption rate and resin loss rate when ion exchange method extracts vanadium in the prior art. higher question

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of high-purity vanadium pentoxide
  • Preparation method of high-purity vanadium pentoxide
  • Preparation method of high-purity vanadium pentoxide

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0034] The embodiment of the present invention discloses a method for preparing high-purity vanadium pentoxide, the method comprising:

[0035] (1) dissolving solution is configured with ammonium metavanadate crude product;

[0036] (2) adding sodium hydroxide and sodium carbonate to the solution, stirring at a constant temperature and adjusting its pH value to 8.5-9.0;

[0037] (3) adding a purifying agent to the lysate after adjusting the pH value, and stirring at a constant temperature for solid-liquid separation to obtain a filtrate;

[0038] (4) ammonium chloride is added in the filtrate, and the ammonium metavanadate precipitation is obtained after standing layering, and the ammonium metavanadate precipitation obtains the ammonium metavanadate crystal after washing and dehydration;

[0039] (5) Calcining ammonium metavanadate crystals at 500-550° C. for 2-2.5 hours to obtain vanadium pentoxide.

[0040] The preparation method of high-purity vanadium pentoxide provided ...

Embodiment 1

[0068] (1) Add the crude ammonium metavanadate to demineralized water, stir and dissolve at 90°C, prepare a solution, and finally measure the concentration of vanadium ions after it is completely dissolved to be 60.23g / L. Add a total of 2900kg of crude ammonium metavanadate. After testing, the main components and their contents in the added ammonium metavanadate crude product are shown in the following table:

[0069]

[0070] (2) Add industrial-grade flake sodium hydroxide and industrial-grade granular sodium carbonate to the solution, keep stirring at a constant temperature of 90°C under normal pressure, adjust the pH value to 9.0, stop adding sodium hydroxide, and stir until completely dissolved ; Now, add 300kg of sodium hydroxide and 145kg of sodium carbonate in total. During this process, keep the exhaust fan on and collect the volatilized ammonia gas, which can be used to prepare the by-product ammonium oxalate, so the whole process is environmentally friendly and po...

Embodiment 2

[0077] (1) Add the crude ammonium metavanadate to demineralized water, stir and dissolve at 85°C, prepare a solution, and finally measure the concentration of vanadium ions after it is completely dissolved to be 61.36g / L. Add a total of 3020.00kg of the crude ammonium metavanadate. After testing, the main components and their contents in the added ammonium metavanadate crude product are shown in the following table:

[0078]

[0079] (2) Add industrial-grade flake sodium hydroxide and industrial-grade granular sodium carbonate to the solution, keep stirring at a constant temperature of 85°C under normal pressure, adjust the pH value to 9.0, stop adding sodium hydroxide, and stir until completely dissolved ; At this point, a total of 330kg of sodium hydroxide was added, and 150kg of sodium carbonate was added. During this process, keep the exhaust fan on and collect the volatilized ammonia gas, which can be used to prepare the by-product ammonium oxalate, so the whole proces...

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 provides a preparation method of high-purity vanadium pentoxide. The method comprises the following steps of preparing dissolving liquid from an ammonium metavanadate crude product; adding sodium hydroxide and sodium carbonate to the dissolving liquid, and adjusting the pH value to be 8.5-9.0; adding a purifying agent to the dissolving liquid of which the pH value is adjusted, and performing solid-liquid separation so as to obtain a filtrate; adding ammonium chloride to the filtrate to obtain ammonium metavanadate precipitation, washing the precipitation, and dehydrating the washed precipitation so as to obtain ammonium metavanadate crystals; and under 500-550 DEG C, calcining the ammonium metavanadate crystals for 2-2.5 hours so as to obtain the vanadium pentoxide. An impurity removing measure of combining a physical method with a chemical method is taken, so that impurity ions can be rapidly and effectively removed, and the purity of the finished products namely the vanadium pentoxide can be effectively improved. The preparation method is simple in technology, the consumption of used reagents is low, few impurities are introduced, and the preparation method is safe, environmental-friendly, pollution-free and low in production cost.

Description

technical field [0001] The invention relates to a method for preparing vanadium pentoxide, in particular to a method for preparing high-purity vanadium pentoxide. Background technique [0002] High-purity vanadium pentoxide refers to increasing the content of vanadium pentoxide and reducing iron, magnesium, arsenic, silicon, phosphorus, sulfur and other trace elements on the basis of the National Standard of the People's Republic of China on vanadium pentoxide GB3283-87. The content of vanadium pentoxide meets the high-end vanadium fields such as military aerospace, cleaning materials, and vanadium batteries, as well as vanadium pentoxide that meets the international standard for export to the European Union. The high-purity vanadium pentoxide defined in the present invention is a vanadium pentoxide with a purity greater than or equal to 99.50%. [0003] At present, high-purity vanadium pentoxide is widely used as the main raw material of all-vanadium redox flow batteries, ...

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): C01G31/02
CPCC01G31/02C01P2006/80
Inventor 李设军杨宏波朱涛张小伟刘俊高文超刘正刚
Owner 陕西华源矿业有限责任公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com