Supercharge Your Innovation With Domain-Expert AI Agents!

Vanadium precipitation method capable of reducing vanadium precipitation wastewater

A technology for vanadium precipitation wastewater and vanadium precipitation, applied in chemical instruments and methods, vanadium compounds, inorganic chemistry, etc., can solve the problem of high impurities in vanadium precipitation products, achieve high vanadium precipitation rate and product purity, reduce waste water volume, and simple process Effect

Active Publication Date: 2016-09-28
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
View PDF1 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the concentration is too high, it will lead to the problem of high impurities in the product of vanadium precipitation. The maximum concentration allowed in the general industry is 30g / L, and every 1t of vanadium pentoxide will produce about 20t of waste water

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

[0027] Take 200ml of vanadium liquid (TV=28g / L) to carry out acidic ammonium salt vanadium precipitation. After the reaction of vanadium precipitation for 40 minutes, slowly add the high-concentration vanadium solution (TV=58g / L) prepared in advance. Use sulfuric acid to continuously control the pH value of the reaction at 2-3, continue to stir and add ammonium salt. When the amount of high-concentration vanadium liquid added was 1L, stop adding, continue heating to boiling and stirring for 30 minutes, then filter, wash, and dry to obtain 126.43 g of ammonium polyvanadate (APV). Which contains V 49.80wt%.

Embodiment 2

[0029] Take 200ml of vanadium liquid (TV=28g / L) to carry out acidic ammonium salt vanadium precipitation. After the reaction of vanadium precipitation for 60 minutes, slowly add the high-concentration vanadium solution (TV=110g / L) prepared in advance. Use sulfuric acid to continuously control the pH value of the reaction at 2-3, continue to stir and add ammonium salt. When the amount of high-concentration vanadium liquid added was 530mL, stop adding, and continue to heat to boiling, stirred and reacted for 60min, then filtered, washed, and dried to obtain 127.38g of ammonium polyvanadate (APV). Which contains V 49.66wt%.

Embodiment 3

[0031] Take 200ml of vanadium liquid (TV=28g / L) to carry out acidic ammonium salt vanadium precipitation. After the reaction of vanadium precipitation for 20 minutes, slowly add the high-concentration vanadium solution (TV=38g / L) prepared in advance. Use sulfuric acid to continuously control the pH value of the reaction at 2-3, continue to stir and add ammonium salt. When the addition of high-concentration vanadium liquid was 1.5L, stop adding and continue heating to boiling. After stirring and reacting for 30min, filter, wash and dry to obtain 125.86g of ammonium polyvanadate (APV). Which contains V 49.74wt%.

[0032] The method of the invention can effectively reduce the amount of waste water, has simple process, high vanadium deposition rate and low product impurities.

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 vanadium precipitation method capable of reducing vanadium precipitation wastewater. The method comprises the following steps: a. carrying out acidic ammonium salt vanadium deposition on a conventional-concentration vanadium solution; b. after finishing adding the ammonium salt in the step a, regulating the pH value and carrying out vanadium precipitation reaction for some time, injecting the high-concentration vanadium solution into the reaction tank; c. adding acid to keep the pH value at 2-3, and continuing holding while stirring; and d. supplementing a certain amount of ammonium salt to continuously react until the precipitation product can not be easily stirred, and filtering to obtain more ammonium vanadate and less vanadium precipitation wastewater. The method provided by the invention can effectively lower the wastewater quantity, and has the advantages of simple technique, high vanadium precipitation rate and high product purity.

Description

technical field [0001] The invention relates to a wastewater pretreatment method, in particular to a vanadium precipitation method for reducing vanadium precipitation wastewater, and belongs to the fields of chemical industry and environmental protection. Background technique [0002] In the existing acidic ammonium salt vanadium precipitation process, the concentration of vanadium solution affects the composition of the precipitate, and the high concentration is conducive to the grain growth of ammonium polyvanadate (abbreviated as APV) and accelerates the precipitation speed. However, if the concentration is too high, it will cause the problem of high impurities in the vanadium precipitation product. The maximum concentration allowed in the general industry is 30g / L, and every 1t of vanadium pentoxide will produce about 20t of wastewater. Increasing the concentration of pre-precipitation liquid is the fundamental way to reduce the generation of wastewater. The method of t...

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
CPCC01G31/00
Inventor 高官金殷兆迁付自碧郭继科张磊王俊李明蒋霖
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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