Supercharge Your Innovation With Domain-Expert AI Agents!

Method for preparing high-purity vanadium pentoxide through sodium salt vanadium precipitation of sodium vanadate solution

A technology of vanadium pentoxide and sodium vanadate, which is applied in the direction of vanadium oxide, etc., can solve the problems of low purity, large consumption of chemicals, increased process cost, etc., and achieve the effect of high purity

Pending Publication Date: 2021-12-17
CHONGQING UNIV
View PDF4 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned deficiencies existing in the prior art, the purpose of the present invention is to provide a method for preparing high-purity vanadium pentoxide by precipitating vanadium from a sodium vanadate solution, so as to solve the problem of low purity of prior art products, long vanadium deposition process, Large consumption of medicaments, increased process costs and other issues

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
  • Method for preparing high-purity vanadium pentoxide through sodium salt vanadium precipitation of sodium vanadate solution
  • Method for preparing high-purity vanadium pentoxide through sodium salt vanadium precipitation of sodium vanadate solution
  • Method for preparing high-purity vanadium pentoxide through sodium salt vanadium precipitation of sodium vanadate solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A method for preparing high-purity vanadium pentoxide by precipitating vanadium from sodium vanadate solution, comprising the following steps:

[0031] 1) Take 50mL of sodium vanadate solution (the content of vanadium element is 41.79g / L, the content of silicon element is 1.2585g / L), after adjusting the pH of the sodium vanadate solution to 2.4 with sulfuric acid, add 0.1g of anionic polyacrylamide CPAM, stirred and reacted at a stirring speed of 200r / min at room temperature for 30min; stood still for 14h, suction filtered, and washed the filter residue with deionized water for 2 to 3 times, the measured desiliconization rate was 86.04%, the vanadium loss rate was 0.19%, and the filtrate Known as vanadium qualified liquid;

[0032] 2) At room temperature, add the qualified vanadium solution dropwise to 0.5 mol / L sulfuric acid solution while stirring until the pH of the mixed solution is 1.8, and stir the mixed solution at T=90°C at a stirring speed of 200r / min. After 6...

Embodiment 2

[0040] A method for preparing high-purity vanadium pentoxide by precipitating vanadium from sodium vanadate solution, comprising the following steps:

[0041] 1) Sodium vanadate solution 50mL, adjust the pH of the solution to 2.8 with sulfuric acid, add 0.1g of anionic polyacrylamide CPAM, stir and react at room temperature at a stirring speed of 200r / min for 50min, let stand for 14h, suction filter, and wash with deionized water Filter residue 2 to 3 times, the measured desiliconization rate is 87.67%, vanadium loss rate is 0.29%, and the filtrate is called vanadium qualified liquid;

[0042] 2) At room temperature, add the qualified vanadium solution dropwise to 1 mol / L sulfuric acid solution while stirring until the pH of the mixed solution is 2.0, then stir and react the mixed solution at T=90°C with a stirring speed of 200r / min for 90min , the solution was naturally cooled to room temperature, the solid and liquid were separated by suction filtration, and the solid was co...

Embodiment 3

[0046] A method for preparing high-purity vanadium pentoxide by precipitating vanadium from sodium vanadate solution, comprising the following steps:

[0047] 1) Sodium vanadate solution 50mL, adjust the pH of the solution to 3.0 with sulfuric acid, add 0.35g of anionic polyacrylamide CPAM, stir and react at room temperature at a stirring speed of 200r / min for 60min, let stand for 14h, suction filter, and use a little deionized water Wash the filter residue 2 to 3 times, the measured desiliconization rate is 88.66%, the vanadium loss rate is 0.14%, and the filtrate is called vanadium qualified liquid;

[0048] 2) At room temperature, add the qualified vanadium solution dropwise to 1mol / L sulfuric acid solution while stirring, until the pH of the mixed solution is 2.4, and stir the mixed solution at T=90°C for 90min at a stirring speed of 200r / min , the solution was naturally cooled to room temperature, the solid and liquid were separated by suction filtration, and the solid wa...

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 method for preparing high-purity vanadium pentoxide through sodium salt vanadium precipitation of a sodium vanadate solution, wherein the method comprises the following steps that: the pH value of the sodium vanadate solution is adjusted to 2.4-5.0 by using a sulfuric acid solution, a silicon removal agent is added, desilicication treatment is carried out, after desilicication is completed, suction filtration separation is carried out and a vanadium qualified solution is collected; the qualified vanadium liquid is dropwise added into a sulfuric acid solution with the pH value smaller than 3.0 till the pH value of the mixed solution ranges from 1.4 to 3.0, sodium salt vanadium precipitation and suction filtration are carried out, and an obtained solid is a vanadium precipitation product; the vanadium precipitation product is added into a sulfuric acid solution with the mass fraction of 30%-70% according to the solid-to-liquid ratio of 1:5-1:30 g / mL, after stirring reaction, suction filtration and washing are carried out, and the obtained solid is sodium-free vanadium polyacid; and the vanadium polyacid is calcined to obtain the high-purity vanadium pentoxide. The method overcomes the defects of an existing vanadium precipitation technology, and solves the problems of low product purity, long vanadium precipitation process, high chemical consumption, process cost increase and the like in the prior art.

Description

technical field [0001] The invention belongs to the fields of vanadium metallurgy and vanadium chemical production, and specifically relates to a method for recovering vanadium and preparing high-purity vanadium pentoxide by using sodium vanadate solution to precipitate sodium ions. Background technique [0002] In the prior art, the traditional vanadium precipitation methods mainly include ammonium salt vanadium precipitation, iron salt vanadium precipitation and hydrolysis vanadium precipitation process. Each of the vanadium deposition processes has advantages and disadvantages. 1. Ammonium salt precipitation vanadium is the NH 4 Cl, (NH 4 ) 2 SO 4 When the ammonium salt is added to the vanadium solution, NH 4 + Can combine with vanadyl ions to form NH 4 VO 3 Or APV precipitation, the resulting precipitation is calcined to obtain vanadium products. This method mainly has the following deficiencies: (1) ammonium salt vanadium precipitation will produce a large amou...

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
CPCC01G31/02C01P2002/72C01P2006/80Y02P10/20
Inventor 李鸿乂王美美郭赟刁江谢兵
Owner CHONGQING UNIV
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com