Zinc sulfate impurity removal method
A technology of zinc sulfate and zinc sulfate solution, applied in the direction of zinc sulfate, etc., can solve the problems of excessive zinc powder and high cost, and achieve the effect of rapid response, low cost and obvious impurity removal effect
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Embodiment 1
[0025] S1. The zinc source reacts with sulfuric acid to form a crude zinc sulfate solution, which is filtered and preliminarily removed to detect the content of lead and nickel;
[0026] S2. The temperature of the zinc sulfate solution was raised to 60° C., and a mixed solution of sodium thiocarbamate and thiourea with a nickel content of 15 times was added by weight ratio, stirred for 1.5 hours, and filtered to obtain a refined zinc sulfate solution.
[0027] Wherein the mixed solution of sodium thiourea and sodium thiourea is, by weight, sodium thiourea: the ratio of water is 1: 1: 2.
Embodiment 2
[0029] S1. The zinc source reacts with sulfuric acid to form a crude zinc sulfate solution, which is filtered and preliminarily removed to detect the content of lead and nickel;
[0030] S2. The temperature of the zinc sulfate solution was raised to 65° C., and a mixed solution of sodium thiocarbamate and thiourea with a nickel content of 15 times was added by weight ratio, stirred for 1 hour, and filtered to obtain a refined zinc sulfate solution.
[0031] Wherein the mixed solution of sodium thiourea and sodium thiourea is, by weight, sodium thiourea: the ratio of water is 1: 1: 4.
Embodiment 3
[0033] S1. The zinc source reacts with sulfuric acid to form a crude zinc sulfate solution, which is filtered and preliminarily removed to detect the content of lead and nickel;
[0034] S2. Heat the zinc sulfate solution to 65° C., add a mixed solution of sodium thiocarbamate and thiourea with a nickel content of 12 times by weight, stir for 1.5 hours, and filter to obtain a refined zinc sulfate solution.
[0035] Wherein the mixed solution of sodium thiourea and sodium thiourea is, by weight, sodium thiourea: the ratio of water is 1: 1: 2.
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