A method for deep purification and iron removal in cobalt solution
A technology of deep purification and cobalt solution, which is applied in the chemical industry, can solve the problems of increasing production costs, increasing process flow, and preparing high-purity cobalt, and achieves the effect of low cost and good stability
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Embodiment 1
[0026] First measure 1000mL CoSO 4 solution (CoSO 4 •7H 2 O crystal powder and ultrapure water), the cobalt ion concentration is 60g / L, and the pH value is adjusted to 2 with concentrated sulfuric acid solution. Then through the ion exchange column equipped with 200ml Monophos resin, the exchange rate of the cobalt solution and the resin is controlled to be 0.2~3.0BV / h, the solution temperature is 50~70°C, the pH value of the solution is 2~3, and the impurity elements after ion exchange adsorption Concentrations are shown in Table 1:
[0027] Table 1 Comparison of iron content before and after purification of cobalt sulfate solution
[0028]
Embodiment 2
[0030] First measure 125L CoSO 4 +CoCl 2 mixed solution (CoSO 4 •7H 2 O crystal powder + CoCl 2 •6H 2 O crystal powder and ultrapure water), the cobalt ion concentration is 100g / L, and the pH value is adjusted to 1 with concentrated sulfuric acid solution. Then through the ion exchange column equipped with 25LMonophos resin, the exchange rate between the cobalt solution and the resin is controlled to be 0.2~3.0BV / h, the solution temperature is 50~70°C, the pH value of the solution is 2~3, and the concentration of impurity elements after ion exchange adsorption As shown in table 2:
[0031] Table 2 Comparison of iron content before and after purification of cobalt sulfate solution
[0032]
Embodiment 3
[0034] First measure 50L CoCl 2 Solution (CoCl 2 •6H 2 O crystal powder and ultrapure water), the cobalt ion concentration is 40g / L, and the pH value is adjusted to 1 with concentrated hydrochloric acid solution. Then through the ion exchange column equipped with 10L Monophos resin, the exchange rate between the cobalt solution and the resin is controlled to be 0.2~3.0BV / h, the solution temperature is 50~70°C, the solution pH is 2~3, and the concentration of impurity elements after ion exchange adsorption as shown in Table 3:
[0035] Table 3 Comparison of iron content before and after purification of cobalt sulfate solution
[0036]
[0037] In order to further verify the deep removal effect of Monophos type resin on impurity iron in cobalt solution, take the CoSO 4 6.0L of the solution is placed in the electrowinning tank, the titanium woven basket is used as the anode, and the cathode is a titanium plate. The electrowinning conditions are as follows: the pH value of ...
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