New Energy Industry Nickel Sulfate Lithium Sulfate Solution for Removing Calcium and Magnesium

Sulfate solutions often contain calcium and magnesium ions, and in some applications, excessive calcium and magnesium ion content can affect the use of sulfate solutions.

For example, battery grade nickel sulfate, cobalt sulfate, and manganese sulfate are important raw materials for emerging lithium battery new energy, especially with the rapid progress of ternary lithium batteries in recent years. The rapid development of the battery field provides broad market prospects for the application of battery grade nickel sulfate, manganese sulfate, and cobalt sulfate, and the demand is increasing year by year.

Crude nickel sulfate, cobalt sulfate, and manganese sulfate exhibit difficulty in removing calcium and magnesium, incomplete removal, long purification time, and high fluoride consumption, reaching ten or even dozens of times. Currently, chemical precipitation methods such as sodium fluoride, ammonium fluoride, or hydrofluoric acid are commonly used to remove calcium and magnesium impurities from nickel sulfate solutions. The fluoride salt precipitation method has a good effect on removing calcium and magnesium, but its drawbacks include: the addition of fluoride salt introduces new cations into the system, which affects the quality of nickel sulfate crystals; Fluorine salts consume a large amount, are expensive, and have high raw material costs; Due to the high excess coefficient of fluoride salts, a large amount of fluorine-containing wastewater is generated during treatment, which is extremely difficult to treat.

Haipu’s chemical industry resins, such as the HP8 resin, are suitable for the selective removal or recovery of divalent metal ions from monovalent metal ions. Divalent metal ions can be easily separated from monovalent metal ions and calcium magnesium iron ions can be removed from lithium sulfate and lithium carbonate solutions.

After preliminary impurity removal and filtration, the feed liquid enters the resin column and selectively adsorbs calcium and magnesium ions in the solution through chelating groups on the resin. The resin product is a highly porous resin containing aminophosphonic acid groups connected to polystyrene copolymers. It is used to selectively remove divalent metal cations from wastewater treatment containing monovalent cations, so that divalent metal cations and other divalent cations can be easily separated from monovalent cations like calcium.

This product can also be used for applications such as removing calcium and magnesium from lithium containing solutions, removing calcium and magnesium from lithium sulfate solutions, removing calcium and magnesium from nickel sulfate solutions, removing calcium and magnesium from lithium carbonate solutions, electroplating and metal pickling, wet metallurgy, lead removal in battery manufacturing, electronics industry, etc.