Preparation method of copper electrolyte impurity removal agent and method for removing impurities in copper electrolyte
A copper electrolyte and electrolyte technology, applied in the field of copper electrolyte purification, can solve the problems of affecting the environment, high power consumption, and large equipment investment.
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[0019] In view of the high cost of removing antimony and bismuth impurities in the copper electrolyte in the prior art and the problem that it is difficult to effectively remove them, the application provides a method for preparing a copper electrolyte de-doping agent. The de-doping agent prepared by this method is applied to copper The removal of impurities in the electrolyte can achieve the purpose of low cost and high removal rate. Specifically, the invention discloses a preparation method of a copper electrolyte removal agent, which includes the following steps:
[0020] Pickling the dynamic wave mud and antimony white with sulfuric acid to obtain a mixture;
[0021] The mixture is oxidized under the action of an oxidizing agent to obtain a copper electrolyte de-doping agent.
[0022] In the preparation process of the copper electrolyte impurity removal agent, the application first configures the raw materials. In a specific embodiment, the dynamic wave mud and the antimon...
Embodiment 1
[0039]First, mix 50g of dynamic wave mud and antimony white according to the mass ratio of 3:1, add 150ml of 220g / L dilute sulfuric acid, add 60ml of hydrogen peroxide, and react at 70-80°C for 1-2 hours to obtain the impurity removal agent; The ingredients are shown in Table 1:
[0040] Table 1 Data sheet of impurity removal agent composition (wt%)
[0041]
[0042] Add the obtained impurity removal agent to the electrolyte to be purified for one time of impurity removal. The temperature of the impurity removal is 60-70°C, and the time is 1.5-2 hours. The composition of the electrolyte and the obtained results are shown in Tables 2 and 3:
[0043] Table 2 Electrolyte composition list
[0044]
[0045] Table 3 1st to 3rd times of impurity removal solution composition list
[0046]
[0047]
[0048] From the above results, it can be seen that the removal rates of antimony and bismuth reached 79.9% and 89.6%, respectively, reaching the expected target.
Embodiment 2
[0050] First, mix 50g of dynamic wave mud and antimony white according to the mass ratio of 2:1, add 150ml of 200g / L dilute sulfuric acid, add 50ml of hydrogen peroxide, and react at 70-80°C for 1-2 hours to obtain the impurity removal agent; The ingredients are shown in Table 4:
[0051] Table 4 Cleaning agent composition list (wt%)
[0052]
[0053] Add the obtained impurity removal agent to the electrolyte to be purified, and carry out the impurity removal once. The temperature of the impurity removal is 60-70°C, and the time is 1.5-2 hours. The composition of the electrolyte and the obtained results are shown in Tables 5 and 6:
[0054] Table 5 Electrolyte composition list
[0055]
[0056] Table 6 1st to 3rd times of impurity removal solution composition list
[0057]
[0058] It can be seen from the above results that the highest removal rates of antimony and bismuth are 91.34% and 95.48%, respectively, reaching the expected goal.
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