Vanadium pentoxide as well as ammonium-free preparation method and application thereof

A technology of vanadium pentoxide and vanadium oxysulfate, which is applied to the preparation of vanadium oxide and vanadium compounds, and the improvement of process efficiency. It can solve the problems of high production cost, low production cost, and large specific surface area, and achieve cost reduction and Effects of environmental pollution, reduction of emissions, and simplification of production processes

Active Publication Date: 2022-03-25
DALIAN RONGKE ENERGY STORAGE GRP CO LTD
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is that the traditional production method of vanadium oxide requires ammonium vanadate precipitation and calcination, which is an ammonium-containing chemical process, and the production cost is relatively high, and the waste water produced needs to be deammonized. There are also problems of ammonia pollution and emissions, and an ammonium-free preparation method of vanadium pentoxide is proposed. The production cost of this method is low, and the product vanadium pentoxide has a smaller particle size and a larger specific surface area

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
  • Vanadium pentoxide as well as ammonium-free preparation method and application thereof
  • Vanadium pentoxide as well as ammonium-free preparation method and application thereof
  • Vanadium pentoxide as well as ammonium-free preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] This embodiment discloses a method for preparing vanadium pentoxide without ammonium, such as figure 1 shown, including the following steps:

[0048] 1. The ratio of sodium carbonate to vanadium slag (V 8.3%) is 1:1, calcined at 850°C for 12 hours in an air atmosphere, and the calcined product is clinker;

[0049] 2. Leach the clinker with water according to the liquid-solid ratio of 4:1, and obtain the vanadium slag leach solution containing V 31g / L;

[0050] 3. Add sulfuric acid to acidify until the pH value is 2, maintain the temperature at 80°C, keep stirring, and introduce sulfur dioxide until the solution turns pure blue;

[0051] 4. Use P 2 0 4 As the extraction agent, sodium hydroxide is used to adjust the pH value, and the vanadium is extracted to the organic phase; dilute sulfuric acid is used as the stripping agent, and the extraction is repeated until the vanadium concentration reaches 50g / L;

[0052] 5. Evaporation and crystallization obtains vanadyl su...

Embodiment 2

[0056] This embodiment discloses a method for preparing vanadium pentoxide without ammonium, comprising the following steps:

[0057] 1. The ratio of sodium carbonate to petroleum fly ash (V 16.6%) is 2:1, and it is calcined at 900°C for 6 hours in an air atmosphere, and the calcined product is clinker;

[0058] 2. Leach the clinker with water according to the liquid-solid ratio of 4:1, and obtain the vanadium slag leach solution containing V 40g / L;

[0059] 3. Add sulfuric acid to acidify until the pH value is 1.5, maintain the temperature at 90°C, and continue to stir. According to the amount of vanadium, add citric acid of 1 / 16 the amount of vanadium, and continue to stir until the solution turns pure blue;

[0060] 4. Use P 2 0 4 As the extraction agent, sodium hydroxide is used to adjust the pH value, and the vanadium is extracted to the organic phase; dilute sulfuric acid is used as the stripping agent, and the extraction is repeated until the vanadium concentration reac...

Embodiment 3

[0064] This embodiment discloses a method for preparing vanadium pentoxide without ammonium, comprising the following steps:

[0065] 1. The ratio of sodium carbonate to petroleum gasification coke residue (V 3.2%) is 5:1, calcined at 700°C for 24 hours in an air atmosphere, and the calcined product is clinker;

[0066] 2. Leach the clinker with water according to the liquid-solid ratio of 2:1, and obtain the vanadium slag leach solution containing V 70g / L;

[0067] 3. Add sulfuric acid to acidify until the pH value is 2, maintain the temperature at 90°C, and continue to stir. According to the amount of vanadium, add zinc powder, continue to stir until the solution turns pure blue, and filter out the residual zinc powder;

[0068] 4. Use P 2 0 4 As the extraction agent, sodium hydroxide is used to adjust the pH value, and the vanadium is extracted to the organic phase; dilute sulfuric acid is used as the stripping agent, and the extraction is repeated until the vanadium conc...

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 vanadium pentoxide as well as an ammonium-free preparation method and application thereof. The ammonium-free preparation method of vanadium pentoxide comprises the following steps: step 1, sodium salt roasting: uniformly mixing sodium carbonate and a vanadium-containing raw material, putting the mixture into a furnace kiln, and carrying out high-temperature oxidation roasting to convert vanadium into water-soluble sodium vanadate; step 2, leaching and filtering: dissolving a material obtained by calcining in the step 1 in water, and filtering to obtain a sodium vanadate leaching solution and waste residues; step 3, adding acid to remove impurities; adding a reducing agent, and reducing vanadium to tetravalent to obtain a mixed solution of tetravalent vanadium and sodium sulfate; step 4, extracting vanadium through extraction-reverse extraction: carrying out a liquid-liquid extraction-reverse extraction method by using an extracting agent to obtain a vanadyl sulfate solution and raffinate containing sodium sulfate; 5, crystallizing to obtain vanadyl sulfate crystals; and step 6, calcining and decomposing vanadyl sulfate to obtain vanadium pentoxide. The method is low in production cost, and the product vanadium pentoxide has smaller granularity and larger specific surface area.

Description

technical field [0001] The invention relates to a production method technology of vanadium pentoxide, in particular to a vanadium pentoxide, its ammonium-free preparation method and application. Background technique [0002] At present, vanadium-titanium magnetite is the main source of vanadium resources, and its original content is less than 1%. After the steelmaking process, the iron is refined, and the vanadium is enriched in the slag, V 2 o 5 When the content is increased to more than 8%, it can be used as a source of vanadium to enter the vanadium chemical industry. The traditional vanadium extraction method is sodium roasting, neutralization and impurity removal, ammonium salt precipitation to obtain ammonium vanadate, and then high-temperature calcination or melt casting to obtain vanadium pentoxide or vanadium flakes. In this process, due to the use of ammonium salts, a large amount of ammonium and sodium-containing wastewater is produced, which needs to be deammo...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C22B34/22C22B7/04C22B1/02C22B3/38C01G31/02
CPCC22B34/22C22B7/04C22B7/001C22B1/02C22B7/006C01G31/02C01G31/003C01P2004/03C01P2002/72Y02P10/20
Inventor 刘国昌孟昭扬杨洪许盛
Owner DALIAN RONGKE ENERGY STORAGE GRP CO LTD
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