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

Preparation method of vanadyl phosphate

A vanadyl phosphate, vanadyl phosphate solid technology, applied in electrical components, battery electrodes, non-aqueous electrolyte storage batteries, etc., can solve the problems of low solubility of vanadium pentoxide in failed vanadium electrolytes, and achieve easy industrial production and recovery. and utilization, the effect of increasing economic benefits

Inactive Publication Date: 2017-01-04
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
View PDF5 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For example, one of the purposes of the present invention is to solve the recovery problem of spent vanadium electrolyte and the little solubility of vanadium pentoxide in phosphoric acid solution

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

[0014] In an exemplary embodiment of the present invention, the preparation method of vanadyl phosphate comprises the following steps:

[0015] First, the vanadium ions in the spent vanadium electrolyte are electrolyzed into pentavalent vanadium ions.

[0016] Secondly, add excess phosphate to the electrolyzed pentavalent vanadium ion electrolyte, stir, and produce yellow-green precipitate. Here, the phosphate may be one or a combination of two or more of potassium phosphate, sodium phosphate, and ammonium phosphate.

[0017] Finally, filter and wash the above yellow-green precipitate with an organic solvent, and dry in air to obtain vanadyl phosphate solid. Here, the organic solvent may be one or a combination of ethanol and acetone.

Embodiment 1

[0020] First, the failed vanadium battery electrolyte was electrolyzed into a V (V) electrolyte, and the sampled solution was tested by ultraviolet-visible light absorption spectrum, and there was no absorption peak of tetravalent vanadium ions in the spectrum. Then, the vanadium ion concentration was determined to be 1.6 mol / L by chemical titration. Take 500mL of the above solution and add excess sodium phosphate. Stirring was continued, and a yellow-green precipitate was rapidly produced in the solution. Finally, filter and wash the yellow-green precipitate with acetone, then place the washed solid in a dry box to obtain vanadyl phosphate (VOPO 4 )solid.

Embodiment 2

[0022] First, the failed vanadium battery electrolyte was electrolyzed into a V (V) electrolyte, and the sampled solution was tested by ultraviolet-visible light absorption spectrum, and there was no absorption peak of tetravalent vanadium ions in the spectrum. Then, the vanadium ion concentration was determined to be 1.5 mol / L by chemical titration. Take 500 mL of the above solution, and add excess ammonium phosphate. Stirring was continued, and a yellow-green precipitate was rapidly produced in the solution. Finally, filter and wash the yellow-green precipitate with ethanol, then place the washed solid in a dry box to obtain vanadyl phosphate (VOPO 4 )solid.

[0023] The invention adopts the invalid vanadium electrode solution to prepare vanadium oxyphosphate, realizes the recovery and utilization of vanadium ions in the electrolyte solution of vanadium batteries, achieves the comprehensive utilization of waste, and avoids the low solubility of vanadium pentoxide in phosph...

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 provides a preparation method of vanadyl phosphate. The method comprises the steps that vanadium ions in an ineffective vanadium electrolyte are electrolyzed into pentavalent vanadium ions; excess phosphate is added in an electrolyzed pentavalent vanadium ion electrolyte, stirring is conducted, and yellow-green precipitates are generated; the precipitates are filtered, washed with an organic solvent and precipitated, and a vanadyl phosphate solid is obtained through drying in the air. According to the preparation method of vanadyl phosphate, the ineffective vanadium electrolyte is adopted for preparing vanadyl phosphate, recovery and utilization of vanadium ions in a vanadium cell electrolyte are achieved, comprehensive utilization of waste is achieved, and meanwhile the problems that vanadium pentoxide is low in solubility and long in reaction time in phosphoric acid are avoided. The method is easy to operate and short in reaction time, the economic benefit is increased, and industrial production is easy to achieve.

Description

technical field [0001] The invention belongs to the field of chemical industry, and in particular relates to a preparation method of vanadyl phosphate. Background technique [0002] Generally, vanadium batteries are considered to be one of the most promising large batteries due to their advantages such as independent output power and capacity, large power and capacity, long cycle life, high energy efficiency, good deep charge and discharge performance, and high safety performance. Large-scale energy storage batteries are attracting more and more attention. However, with the continuous charge and discharge cycles of the vanadium battery, there will be a problem that the concentration and valence state of the vanadium ions in the positive and negative electrolytes do not match, resulting in the failure of the vanadium battery to work normally. When the utilization rate of the electrolyte fails to meet the design requirements, it is necessary to replace the new vanadium electr...

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): H01M4/58H01M10/05
CPCH01M4/5825H01M10/05Y02E60/10
Inventor 陈勇
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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