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

Method for preparing sodium metavanadate

A technology of sodium metavanadate and sodium polyvanadate, which is applied in the fields of chemical instruments and methods, vanadium compounds, inorganic chemistry, etc., can solve the problems of high production cost and high price, and achieve fewer types of raw materials, simple process operation, and convenient The effect of industrial production

Active Publication Date: 2010-06-09
PANGANG GRP PANZHIHUA STEEL & VANADIUM +1
View PDF0 Cites 26 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the method for V 2 o 5 Higher purity requirements, V 2 o 5 More expensive and therefore expensive to produce

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

preparation example Construction

[0022] According to the method for preparing sodium metavanadate of the present invention, the pH value of the sodium metavanadate leaching solution is adjusted to 1.1-1.6 with inorganic acid, and then heated to 90° C. and kept in a boiling state for 60-90 minutes, so that the vanadium can be hydrolyzed and precipitated The rate reaches more than 99.5%. During the heat preservation process, in order to ensure that the reaction proceeds more fully, inorganic acid can be added to the reactant to maintain the pH value at 1.1-1.6.

[0023] If the pH value is less than 1.1, not only the acid consumption increases, but also vanadium is easily converted into dissolved VO 2 + cation, the vanadium precipitation rate decreased significantly. If the pH value is greater than 1.6, the solubility of polyvanadate ions increases, and the vanadium precipitation rate decreases significantly. The inorganic acid can be selected from at least one of sulfuric acid, hydrochloric acid, nitric acid...

Embodiment 1

[0032] Get 500mL of sodium vanadium extraction leachate (V 5+ Concentration is 29.23g / L, Na + The concentration is 16.2g / L, Cr 6+ Concentration is 1.1g / L, and Si element concentration is 0.7g / L, and P element concentration is 0.01g / L), is the concentrated sulfuric acid of 98% that the pH value of the vanadium extracting leaching solution of sodiumization is adjusted to 1.1 with concentration, then it is Heating to 90°C, fully stirring, adding concentrated sulfuric acid with a concentration of 98% during the heat preservation period so that the pH value remains at 1.1, filtering out the hydrolyzed solid (sodium polyvanadate) after maintaining at 90°C for 60 minutes, and washing quickly to obtain Sodium polyvanadate crystals. The sodium polyvanadate crystal of gained is placed in the reactor, to it gradually adding concentration is 40% sodium hydroxide solution and fully stirred, so that the pH value of solution in the solid-liquid mixture is 8 (after adding sodium hydroxide s...

Embodiment 2

[0038] Get 500mL of sodium vanadium extraction leachate (V 5+ The concentration is 21.5g / L, Na + The concentration is 18.9g / L, Cr 6+ Concentration is 1.34g / L, and Si element concentration is 0.78g / L, and P element concentration is 0.04g / L), is the concentrated sulfuric acid of 98% that the pH value of the vanadium extracting leaching solution of sodiumization is adjusted to 1.3 with concentration, then its Heating to 95°C, fully stirring, adding concentrated sulfuric acid with a concentration of 98% during the heat preservation period so that the pH value remains at 1.3, filtering out the hydrolyzed solid (sodium polyvanadate) after maintaining at 95°C for 70 minutes, and washing quickly to obtain Sodium polyvanadate crystals. The sodium polyvanadate crystal of gained is placed in the reactor, to it gradually adding concentration is the sodium hydroxide solution of 50% and fully stirs, makes the pH value of solution in the solid-liquid mixture be 8 (after adding sodium hydro...

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 method for preparing sodium metavanadate, which comprises the following steps: a. adjusting the pH value of a leach solution obtained by sodium treatment and vanadium extraction to 1.1-1.6 by an inorganic acid, then heating the leach solution to 90 DEG C until boiling, and keeping for 60-90 minutes to generate solid sodium polyvanadate; b. adding sodium hydroxide solution to the obtained solid sodium polyvanadate, and stirring the obtained solid-liquid mixture, so that the pH value of the solution in the solid-liquid mixture is 8-8.5; and c. heating the solid-liquid mixture to 90 DEG C until boiling to generate solid sodium metavanadate. By the method, high-purity sodium metavanadate can be prepared and the method has small consumption of alkali and low cost.

Description

technical field [0001] The present invention relates to a kind of method of preparing sodium metavanadate, more specifically, relate to a kind of method of preparing sodium metavanadate by sodium vanadium extraction leach solution. Background technique [0002] Sodium metavanadate (NaVO 3 ) is widely used in the chemical industry. It can be used as a catalyst, drier, mordant, and ammonium vanadate and potassium metavanadate. It can also be used in medical imaging, plant inoculation, and corrosion inhibitor. At present, sodium metavanadate can be extracted from vanadium-containing sodium roasting leaching solution, and there are two main methods. [0003] The first method is to evaporate, concentrate and crystallize the vanadium-extracting leaching solution after removing impurities, so as to obtain sodium metavanadate solid. The method is simple in process and convenient in operation, but the leach solution for extracting vanadium has complex components and incomplete remo...

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): C01G31/00
Inventor 陈亮熊仁利李千文李大标
Owner PANGANG GRP PANZHIHUA STEEL & VANADIUM
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