Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Method for recovering vanadium and sodium from sodium vanadate solution

A technology from sodium vanadate and sodium vanadate, applied in chemical instruments and methods, vanadium oxide, alkali metal carbonate, etc., can solve problems such as difficult to handle, exist environmental risks, and be difficult to use, and achieve high crystallization yield, The effect of eliminating environmental hazards

Inactive Publication Date: 2019-10-22
PANGANG GROUP VANADIUM TITANIUM & RESOURCES
View PDF4 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Sodium vanadate solution is obtained by immersing sodiumized roasted clinker in water. The method of vanadium precipitation with acidic ammonium salt is generally used to prepare vanadium products. This process will produce a large amount of solid waste sodium sulfate mixed with a large amount of ammonium sulfate, which is difficult to use and has environmental risks.
[0003] Literature "Extracting V from trona sodium vanadium slag 2 o 5 and recovery of sodium salt" (Zhou Zude, Lu Tao, Liao Deyi, Zhang Zetian. Iron and Steel Vanadium Titanium, 1984, (1): 65-70.) After evaporation and concentration, carbon dioxide carbonization is used to recover part of the sodium salt in the form of sodium bicarbonate, and then add chlorine Ammonium chloride vanadium precipitation, this process can only recover part of the sodium salt in the solution, and ammonium chloride is added to the solution after separating sodium bicarbonate to precipitate vanadium, which is not conducive to the recovery of sodium salt
[0004] The document "Vadium extraction from sodium vanadium slag and recovery of soda ash" (Zhang Zhonghao, Lu Wulin, Cheng Zhengdong, Zhang Xinghe, Hu Wenbin. Iron and Steel, 1986,21(10):14-18.) uses electrodialysis to remove part of the sodium and Through carbon dioxide carbonization, sodium salt is recovered in the form of sodium bicarbonate, ammonium sulfate is added to the solution after separation of sodium bicarbonate to precipitate vanadium, this process can only recover part of the sodium salt in the solution, and ammonium sulfate is added to the solution after separation of sodium bicarbonate to precipitate vanadium It will produce wastewater containing sodium sulfate and ammonium sulfate, which is difficult to treat

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

[0043] Take 1000mL of sodium vanadate solution (V 27.64g / L, Na 20.38g / L), press NH 4 + Add 124g of ammonium bicarbonate at a molar ratio of 2.9, stir and react for 180min at a vanadium precipitation temperature of 10°C, separate solid and liquid to obtain ammonium metavanadate and supernatant liquid, ammonium metavanadate is oxidized and calcined at 550°C for 3h to obtain V of vanadium products 2 o 5 The content is 99.2%. Supernatant V 2.59g / L, NH 4 + 20.42g / L, stirring deamination at 90°C for 40min, deamination solution NH 4 + The concentration was 1.6g / L; the deamination solution was further concentrated to a V concentration of 28g / L, the pH was adjusted to 7.8 by carbon dioxide, and cooled to 10°C to crystallize sodium bicarbonate, and 63.2g of sodium bicarbonate was obtained by solid-liquid separation. The crystallization mother liquor returns to the sodium vanadate solution to further precipitate ammonium metavanadate.

Embodiment 2

[0045] Take 1000mL of sodium vanadate solution (V 35.92g / L, Na 38.66g / L), press NH 4 + Add 194g of ammonium bicarbonate at a molar ratio of 3.5, stir and react for 180min at a vanadium precipitation temperature of 15°C, separate solid and liquid to obtain ammonium metavanadate and supernatant liquid, ammonium metavanadate is oxidized and calcined at 550°C for 3h to obtain V of vanadium products 2 o5 The content is 98.7%. Supernatant V 3.25g / L, NH 4 + 32.67g / L, stirring deamination at 100°C for 60min, deamination solution NH 4 + The concentration was 1.8g / L; the deamination solution was further concentrated to a V concentration of 33g / L, adjusted to pH=7.8 by passing through carbon dioxide and cooled to 10°C to crystallize sodium bicarbonate, and 129.2g of sodium bicarbonate was obtained by solid-liquid separation. The crystallization mother liquor returns to the sodium vanadate solution to further precipitate ammonium metavanadate.

Embodiment 3

[0047] Take 1000mL of sodium vanadate solution (V 39.24g / L, Na 24.18g / L), press NH 4 + Add 74g of ammonium carbonate at / V molar ratio 2.0, stir and react for 180min at the vanadium precipitation temperature of 20°C, separate the solid and liquid to obtain ammonium metavanadate and the supernatant liquid, and oxidize and calcinate the ammonium metavanadate at 550°C for 3h to obtain vanadium pentoxide Product's V 2 o 5 The content is 99.6%. Supernatant V 3.16g / L, NH 4 + 17.97g / L, stirring deamination at 80°C for 60min, deamination solution NH 4 + The concentration is 1.5g / L; the deamination solution is further concentrated to a V concentration of 38g / L, the pH is adjusted to 8.2 by carbon dioxide and cooled to 10°C to crystallize sodium bicarbonate, and 78.3g of sodium bicarbonate is obtained by solid-liquid separation. The crystallization mother liquor returns to the sodium vanadate solution to further precipitate ammonium metavanadate.

[0048] The method of the inven...

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 vanadium hydrometallurgy, and particularly relates to a method for recovering vanadium and sodium from a sodium vanadate solution. The method comprisesthe following steps: (1) adding ammonium salt into the sodium vanadate solution, and carrying out solid-liquid separation after reaction to obtain solid and liquid; and (2) calcining the solid to obtain vanadium pentoxide; decomposing ammonium salt in the liquid to obtain a deamination solution, introducing CO2 to adjust pH to 7.8-8.5, and carrying out solid-liquid separation to obtain sodium bicarbonate. The method can improve recovery rate of vanadium, and simultaneously recover sodium salt; and generation of solid waste sodium sulfate can be avoided.

Description

technical field [0001] The invention belongs to the technical field of vanadium hydrometallurgy, and in particular relates to a method for recovering vanadium and sodium from sodium vanadate solution. Background technique [0002] Vanadium slag is the main raw material for producing vanadium oxide, and the traditional production process is sodium roasting-water leaching to extract vanadium. Sodium vanadate solution is obtained by soaking sodiumized roasted clinker in water. The method of precipitating vanadium with acidic ammonium salt is generally used to prepare vanadium products. This process will produce a large amount of solid waste sodium sulfate mixed with a large amount of ammonium sulfate, which is difficult to use and has environmental risks. [0003] Literature "Extracting V from trona sodium vanadium slag 2 o 5 and recovery of sodium salt" (Zhou Zude, Lu Tao, Liao Deyi, Zhang Zetian. Iron and Steel Vanadium Titanium, 1984, (1): 65-70.) After evaporation and con...

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): C22B34/22C22B26/10C22B7/00C01G31/02C01D7/00
CPCC01D7/00C01G31/02C22B7/00C22B26/10C22B34/22Y02P10/20
Inventor 王英付自碧汪超李千文游本银
Owner PANGANG GROUP VANADIUM TITANIUM & RESOURCES
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
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