What are the extractants of nickel, cobalt and manganese

1. Overview

Nickel, cobalt and manganese are important industrial raw materials, and their extraction and separation technologies have always attracted much attention. In the extraction process of nickel, cobalt and manganese, the selection of extractant is particularly important. This article will introduce some commonly used nickel-cobalt-manganese extractants and their applications.

2. nickel-cobalt extractant

1. Phthalic anhydride extractant

Phthalic anhydride (D2EHPA) is one of the commonly used nickel-cobalt extractants. It is widely used in the extraction and separation of nickel and cobalt. D2EHPA has the characteristics of good selectivity and high extraction efficiency, but the extraction effect of doping impurities such as iron and manganese is not good.

2. Amide extractant

Amide extractants mainly refer to MX, Alamine, Cyanex and other series. These extractants are capable of separating not only nickel, cobalt, but also other similar elements, such as manganese, copper, zinc, etc. However, their extraction rate is slow, and the extraction efficiency will be significantly reduced when the acidity is higher than 2 or lower than 0.5.

3. manganese extractant

1. Acidic sodium carbonate

Acidic sodium carbonate is a kind of manganese extraction agent, which is widely used in the field of environmental protection. Its advantages are simple operation, non-toxic, easy to degrade, and will not cause pollution to the environment. However, it has a great influence on the high concentration of magnesium ions, and the pretreatment is needed to obtain a better extraction effect.

2. Imine oxide extractant

The amine oxide extractant has the advantages of good selectivity and high extraction efficiency, and is mainly used in the extraction and separation of manganese in seawater. A major feature of this type of extractant is its ability to withstand high salinity environments.