Advantages of magnesium oxide cobalt deposition

Mild alkaline release: MgO dissolves slowly and is suitable for precise reaction control, avoiding impurities co precipitation caused by high pH. Good selectivity: When controlling the pH reasonably, only cobalt can be precipitated without copper, nickel, etc

Environmental safety: Mg ² ⁺ is non-toxic, environmentally friendly, and the by-product liquid can be recycled

Moderate cost: Compared to alkalis such as NaOH and NH ₄ OH, MgO is safer to transport and store

Stir thoroughly: Ensure even distribution of magnesium oxide; Application Process Overview

Acid leaching of cobalt: First, use sulfuric acid or other acids to leach cobalt containing materials, forming a solution containing Co ² ⁺;

Adjust pH: Add magnesium oxide to slowly raise the pH of the solution to about 8.0-9.0;

Reaction precipitation: Co ² ⁺ precipitates as Co (OH) ₂ within this pH range;

Filtration and separation: Filter out the precipitate, wash it, and further refine it into metallic cobalt or convert it into other cobalt salts.

Precautions

Reaction time: usually takes 30 minutes to several hours to react;

Preventing cobalt from re dissolving: Low pH control or incomplete reaction may lead to cobalt not settling or re dissolving;

Moderate temperature: The reaction is faster and more efficient at 40-60 ℃