Method for purifying cobalt intermediate product of cobalt-containing solution

The invention discloses a method for purifying a cobalt intermediate product of a cobalt-containing solution, which comprises the following steps: neutralization: adding a neutralizer into the cobalt-containing solution to carry out a neutralization reaction, and carrying out solid-liquid separation after the neutralization reaction to respectively obtain a neutralized solution and neutralized slag; cadmium removal: mixing the neutralization solution with zinc powder for a replacement reaction, and separating after the replacement reaction to obtain a cadmium-removed solution and crude cadmium slag; zinc removal: adding an extracting agent into the cadmium-removed liquid, and extracting to respectively obtain a zinc-loaded organic phase and cobalt-containing raffinate; and cobalt precipitation: carrying out cobalt precipitation reaction on the raffinate to obtain a cobalt intermediate product. According to the method, deep removal of cadmium and zinc can be effectively achieved under the condition that cobalt