A method for preparing high-purity trivalent vanadium sulfate crystal based on solvent replacement method and preparing 3.5-valence vanadium electrolyte
The preparation of high-purity trivalent vanadium sulfate crystals by solvent displacement crystallization method solves the preparation problem in the existing technology, realizes the preparation of high-purity and stable vanadium sulfate crystals, reduces production and transportation costs, and allows for on-site preparation of electrolyte.
Patent Information
- Application Number
- CN202610428495.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-04-02
- Publication Date
- 2026-07-17
AI Technical Summary
Existing technologies make it difficult to efficiently prepare high-purity, stable trivalent vanadium sulfate crystals, resulting in high production costs, inconvenient transportation, and complex processes for vanadium electrolyte production.
A solvent displacement crystallization method was adopted. After preparing a high-concentration vanadium oxysulfate solution, electrolysis was performed, and a specific organic solvent was added to induce crystal precipitation. Combined with solid-liquid separation, washing and drying, high-purity vanadium sulfate crystals were obtained and mixed with vanadium oxysulfate to prepare a 3,5-valent vanadium electrolyte.
This technology enables the preparation of high-purity, high-stability vanadium sulfate crystals, reducing production costs, simplifying the process, and allowing for on-site preparation of electrolytes at energy storage power stations, thus reducing transportation costs.
Smart Images
Figure CN122406240A_ABST