Method for separating and recycling vanadium and chromium from vanadate-chromate-containing solution
A vanadium-containing chromate, separation and recovery technology, applied in the field of separation and recovery of vanadium-chromate solution containing vanadium chromate, can solve the problems of difficult control of process conditions, high cost, incomplete separation, etc.
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
Embodiment 1
[0028] Take 10L vanadium slag containing V 0.4g / L, Cr 2.5g / L, pH value 1.5 to form vanadium precipitation solution, first add sodium hydroxide to adjust the pH value to 2.5, and then use weak base resin D301 to preferentially adsorb Vanadium in the solution after vanadium precipitation, until the concentration of vanadium in the effluent is equal to the concentration of vanadium in the feed solution, the contact time for vanadium adsorption is 30min, and the V in the effluent is 0.02g / L as the breakthrough point for resin adsorption of vanadium . Use weak base anion resin D315 to adsorb chromium in the effluent before the leakage point, and the contact time for chromium adsorption is 45 minutes. The solution that flows out after crossing the dew point returns to the vanadium adsorption process to completely adsorb the vanadium therein. The negative vanadium resin is desorbed with 3.0mol / L NaOH solution, the contact time of vanadium desorption is 45min, the desorption solution...
Embodiment 2
[0030] The leaching solution containing V 4.1g / L and Cr 1.5g / L obtained by extracting vanadium from 15L vanadium slag for the second time, firstly add sulfuric acid to adjust the pH value to 3.0, then use strong base resin D211 to preferentially adsorb and leach the chromium in it until the chromium in the effluent The concentration of chromium is equal to the concentration of chromium in the feed solution, the chromium adsorption contact time is 60min, and the effluent contains 0.03g / L of Cr as the breakthrough point of resin adsorption chromium. The effluent before the leakage point is adsorbed with strong base anion resin D231 to absorb vanadium, and the contact time for vanadium adsorption is 30min. The solution flowing out after the dew point is returned to the chromium adsorption process to completely adsorb the chromium therein. Negative chromium resin is desorbed with 2mol / L NaOH solution, and the contact time of chromium desorption is 80min. Add sodium thiosulfate to ...
Embodiment 3
[0032] 5L high chromium vanadium slag is obtained after sodium roasting-water immersion containing V 12.3g / L, Cr 8.2g / L solution, first add magnesium chloride to the solution to purify and remove impurities, add sulfuric acid to adjust the pH value to 3.5, and then Use strong base anion resin D204 to preferentially adsorb and leach the chromium until the concentration of chromium in the effluent is equal to that in the feed liquid, the chromium adsorption contact time is 60min, and the chromium in the effluent contains 0.05g / L as the resin adsorption Chromium leak point. Add sulfuric acid to the outflowing solution before the leakage point to adjust the pH value to 1.8, then add ammonium sulfate to precipitate ammonium polyvanadate according to 1.2 times the stoichiometric amount required for vanadium precipitation, and ammonium polyvanadate is calcined at 500°C for 3 hours to obtain a purity of 98.8%. Vanadium pentoxide products. The solution flowing out after the dew point ...
PUM
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
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