Method for preparing high-purity vanadium pentoxide by purifying ammonium metavanadate

A technology of vanadium pentoxide and ammonium metavanadate, which is applied in the field of metallurgy, can solve the problems of high cost and complicated process, achieve the effects of low pollution, simple process, and avoid difficult wastewater treatment

Inactive Publication Date: 2021-01-12
CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
View PDF9 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The technical problem to be solved in the present invention is: problems such as complex flow process and high cost existing in the existing ammonium metavanadate purification method

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

[0057] Embodiment 1 adopts the method of the present invention to purify ammonium metavanadate to prepare high-purity vanadium pentoxide

[0058] Weigh 100g of impure ammonium metavanadate (its impurity content is (%): K-0.021, Na-0.020, Si-0.124, Cr-0.087, Ca-0.141, Fe-0.160, P-0.081, Mg-0.064 ), add 200ml of deionized water and 20g of solid sodium hydroxide to dissolve, heat to boil and add 0.03g of lignocellulose, stir and react for 1 hour and then stand for 12 hours, and filter to obtain vanadium solution. Stir 10ml of concentrated sulfuric acid into 10ml of deionized water, add the filtrate to the sulfuric acid solution while it is still hot, heat and boil for 15 minutes, filter and wash twice with deionized water to obtain a filter cake, heat the filter cake to 65°C and add 20ml of Ammonia water was completely dissolved, placed at 5°C for rapid cooling, the precipitated ammonium metavanadate was washed twice with deionized water, dried and sent for inspection. %, Cr-0.0...

Embodiment 2

[0059] Embodiment 2 adopts the inventive method to purify ammonium metavanadate to prepare high-purity vanadium pentoxide

[0060] Weigh 150g of impure ammonium metavanadate (its impurity content is (%): K-0.021, Na-0.020, Si-0.124, Cr-0.087, Ca-0.141, Fe-0.160, P-0.081, Mg-0.064 ), add 300ml of deionized water and 30g of solid sodium hydroxide to dissolve, heat to boil and add 0.07g of lignocellulose, stir and react for 1.5 hours and then stand for 18 hours, and filter to obtain vanadium solution. Stir 15ml of concentrated sulfuric acid into 6.5ml of deionized water, add the filtrate to the sulfuric acid solution while it is still hot, heat and boil for 20 minutes, filter and wash twice with deionized water to obtain a filter cake, heat the filter cake to 70 ° C and add 30ml of ammonia water was completely dissolved, placed at 15°C for rapid cooling, the precipitated ammonium metavanadate was washed twice with deionized water, dried and sent for inspection. 0.0052%, Cr, Ca, ...

Embodiment 3

[0061] Embodiment 3 adopts the method of the present invention to purify ammonium metavanadate to prepare high-purity vanadium pentoxide

[0062] Weigh 300g of impure ammonium metavanadate (its impurity content is (%): K-0.021, Na-0.020, Si-0.124, Cr-0.087, Ca-0.141, Fe-0.160, P-0.081, Mg-0.064 ), add 500ml of deionized water and 50g of solid sodium hydroxide to dissolve, heat to boil and add 1.0g of lignocellulose, stir and react for 2 hours, let stand for 24 hours, and filter to obtain vanadium solution. Add 20ml of concentrated sulfuric acid to 10ml of deionized water while stirring, add the filtrate to the sulfuric acid solution while it is still hot, heat and boil for 30min, filter and wash twice with deionized water to obtain a filter cake, heat the filter cake to 80°C and add 40ml Ammonia water was completely dissolved, placed in rapid cooling at 25°C, the precipitated ammonium metavanadate was washed twice with deionized water, dried and sent for inspection. The obtain...

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 belongs to the technical field of metallurgy, and particularly relates to a method for preparing high-purity vanadium pentoxide by purifying ammonium metavanadate. Aiming at the problemsof complex process, over-high cost and the like of an existing ammonium metavanadate purification method, the invention provides a method for preparing high-purity vanadium pentoxide by purifying ammonium metavanadate, which comprises the following steps of: a, dissolving ammonium metavanadate in an alkali; b, heating and boiling the solution, adding lignocellulose, conducting stirring and reacting for 1-2 hours, conducting standing and precipitating for 12-24 hours, and conducting filtering; c, adding the filtrate into sulfuric acid, conducting heating to boil, conducting stirring for reaction for 10-30 minutes, conducting filtering, and washing a filter cake; d, heating the filter cake to 60-80 DEG C, adding ammonia water to dissolve the filter cake, quenching the solution at 5-25 DEG C, separating out white crystals, and conducting washing to obtain high-purity ammonium metavanadate; and e, calcining ammonium metavanadate to obtain high-purity vanadium pentoxide. According to the method, the ammonium metavanadate and the vanadium pentoxide which are high in purity can be prepared through alkali dissolution precipitation and hydrolysis precipitation, the technological process issimple, and the cost is low.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a method for purifying ammonium metavanadate to prepare high-purity vanadium pentoxide. Background technique [0002] Vanadium has excellent physical and chemical properties, known as metal "vitamin", and has a wide range of uses in metallurgy, chemistry, building materials and other fields, especially for improving the strength and toughness of steel. [0003] Ammonium metavanadate is mainly used as chemical reagent, catalyst, mordant, etc., mostly used to prepare vanadium pentoxide. Due to the complicated preparation process and the difference in the grade of vanadium-containing ores, the currently commercially available ammonium metavanadate produces ammonium metavanadate with poor purity and uneven quality. With the wide application of ammonium metavanadate in various industries, the requirements for the purity of ammonium metavanadate are getting higher and h...

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): C01G31/02
CPCC01G31/02C01P2006/80
Inventor 姚洁刘波李道玉辛亚男
Owner CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST 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