Method for preparing metavanadate

A technology of metavanadate and calcium vanadate, applied in chemical instruments and methods, vanadium compounds, calcium carbonate/strontium/barium, etc., can solve the problem of low vanadium yield, difficult control of vanadium precipitation process, and large acid consumption and other problems, to achieve the effect of reducing the preparation process and achieving significant economic and environmental benefits

Inactive Publication Date: 2015-05-20
HEBEI IRON AND STEEL
View PDF2 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the pH value needs to be adjusted to 1.1 to 1.6 in the process of precipitating sodium polyvanadate, the consumption of acid is relatively large, the process of vanadium precipitation is difficult to control and the vanadium yield is low

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 metavanadate
  • Method for preparing metavanadate
  • Method for preparing metavanadate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A method for preparing metavanadate: 1) Take the sodiumized vanadium-extracting leachate after impurity removal, put it in a reactor, heat it to 80°C, and add it to the sodiumized vanadium-extracting leachate according to the molar ratio of Ca:V=1.5:1 Calcium oxide was added to the mixture, and after reacting for 30 minutes, after liquid-solid separation, washing, filtration, and drying, a calcium vanadate solid containing V=20%, Ca=40% was obtained; 2) Take the calcium vanadate solid obtained in step 1). Add 300g and 500mL of water into the beaker together, and start stirring and heating, add 92g of sodium bicarbonate according to the molar ratio of Na:V=1:1, and pass in carbon dioxide gas, the ventilation rate is 0.8L / (minKg), Heating to 80°C and reacting for 6 hours, the pH is 8.3; 3) Liquid-solid separation to obtain calcium carbonate solid and sodium metavanadate solution, the solution concentration is 200g / L; place it in a container, turn on and stir for natural cr...

Embodiment 2

[0032] A method for preparing metavanadate: 1) Take the impurity-removed sodium vanadium extraction leaching solution and the reactor, heat it to 100°C, and pour it into the sodium vanadium extraction leaching solution according to the molar ratio of Ca:V=2:1 Add calcium hydroxide slurry, react for 40 minutes, and obtain solid calcium vanadate containing V=19%, Ca=43% after liquid-solid separation, washing, filtration and drying; 2) Take the vanadic acid obtained in step 1) Add 300g of calcium solids and 500mL of water into the beaker together, and turn on stirring and heating, add 88g of sodium bicarbonate according to the molar ratio of Na:V=0.8:1, and pass in carbon dioxide gas, the ventilation rate is 0.1L / (minKg ), heated to 100°C, and measured after 2 hours of reaction, the pH is 8.2; 3) Liquid-solid separation to obtain calcium carbonate solid and sodium metavanadate solution, the solution concentration is 80g / L; put it in the container, turn on and stir Natural crystal...

Embodiment 3

[0034] A method for preparing metavanadate: 1) Take the impurity-removed sodium vanadium extraction leaching solution and the reactor, heat it to 93°C, and pour it into the sodium vanadium extraction leaching solution according to the molar ratio of Ca:V=1.8:1 Add calcium hydroxide slurry, react for 35 minutes, and obtain solid calcium vanadate containing V=19%, Ca=43% after liquid-solid separation, washing, filtration and drying; 2) Take the vanadic acid obtained in step 1) Add 300g of calcium solid and 500mL of water into the beaker together, and turn on stirring and heating, and add sodium bicarbonate according to the molar ratio of Na:V=0.9:1 99 g, and pass in carbon dioxide gas, the ventilation rate is 0.5L / (minKg), heated to 88 ° C, and measured after 1 hour of reaction, the pH is 8.5; 3) liquid-solid separation to obtain calcium carbonate solid and sodium metavanadate solution, the solution The concentration is 120g / L; put it in a container, turn on and stir for natural...

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 relates to a method for preparing metavanadate. The method comprises the following steps: adding a calcium precipitator into a sodium treatment vanadium recovery leaching solution to react for 30-40 minutes, performing liquid-solid separation, washing, and filtering, thereby obtaining calcium vanadate solids; adding the calcium vanadate solids and water into a reactor, stirring, heating, adding bicarbonate, adding according to the molar ratio of metal cations to V of (0.8-1):1 in bicarbonate, introducing carbon dioxide gas, and heating to the temperature of 80-100 DEG C to react for 1-6 hours, thereby obtaining slurry containing metavanadate and calcium carbonate based on the moment when the pH value is 7.5-8.5 as the reaction endpoint; performing liquid-solid separation on the slurry, thereby obtaining the calcium carbonate solids and sodium metavanadate solution; and crystallizing the sodium metavanadate solution, and separating to obtain sodium metavanadate and crystallized solution, drying, thereby obtaining the sodium metavanadate solids. According to the method, vanadium liquid in the vanadium chemical production process can serve as a raw material, the metavanadate is prepared, the pollution problem of ammonia-nitrogen wastewater in the traditional ammonium precipitation process is solved, the complicated process is reduced, and the cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a preparation method of metavanadate. Background technique [0002] There are two specifications of sodium metavanadate and potassium metavanadate, and their chemical compositions are shown in Table 1 and Table 2. Sodium metavanadate is widely used in the chemical industry, and can be used as drier, catalyst, mordant, etc., and can also be used in medical imaging, plant inoculation and corrosion inhibitor, etc.; potassium metavanadate is mainly used as chemical reagents, catalysts, catalysts, etc. Drying agent, mordant, etc. [0003] At present, sodium metavanadate is produced based on the final product or intermediate product in the process of vanadium slag sodium roasting to produce vanadium. One method is to adjust the pH value, evaporate and crystallize the vanadium-extracting leaching solution to obtain solid sodium metavanadate after removing impurit...

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): C01G31/00C01F11/18
CPCC01G31/00C01F11/181C01P2006/80
Inventor 高明磊陈东辉李兰杰石立新周冰晶
Owner HEBEI IRON AND STEEL
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