How to Make Vanadium (III) Sulfate

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Vanadium (III) sulfate is a salt of sulfuric acid. It is commonly used as an electrolyte in a redox flow battery and is also used in the production of glass, ceramics and alloys. The present invention provides a method of making vanadium (III) sulfate.

In the present invention, a high concentration of sulfuric acid is used to prepare the aqueous solution. This reduces the reaction time and improves the yield. High purity vanadium (III) sulfate can be readily produced.

The amount of aqueous sulfuric acid solution can be calculated and diluted to a desired concentration. Once the aqueous solution has been diluted, it can be dissolved in water. To dissolve the sulfuric acid, it is necessary to add a nitrogen gas to the solution. Using a nitrogen gas can remove the water generated in the process, which can increase the efficiency of the production.

The aqueous solution has a high viscosity. The reaction solution was filtered through an acid-resistant filter. Kapton windows were used to observe the sample. A chart is shown below.

The amount of vanadium ions in the aqueous solution is about 2 mol / l. If the concentration is lower, it is important to add a larger amount of sulfuric acid to increase the concentration of the solution.

In the previous art, the production of vanadium (III) sulfate was difficult. In the present invention, a high-quality vanadium (III) sulfate aqueous sulfuric acid solution can efficiently be prepared.

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