Regeneration copper extraction method of nitric acid etching solution
A technology of etching solution and nitric acid, which is applied in the field of regeneration and copper extraction of nitric acid etching solution, can solve the problems of excessive use of strong oxidizing agents and pollution, and achieve high-efficiency recovery and high-quality effects
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Embodiment 1
[0034] The regeneration copper extraction method of the nitric acid etching solution of the present embodiment may further comprise the steps:
[0035] 1) Separating the copper-containing nitric acid etching solution through a vinylpyridine-based strongly acidic cation exchange membrane to obtain a high-copper solution and a low-copper solution, wherein the copper ion concentration in the high-copper solution is 70g / L, and the copper ion concentration in the low-copper solution The ion concentration is 6g / L;
[0036] 2) adding concentration to the high-copper solution obtained in step 1) is 18% sodium chlorate, the volume of sodium chlorate accounts for 1% of the volume of the high-copper solution, and performs primary electrolysis. The temperature is 18°C. After electrolysis, copper ions crystallize into copper plates at the cathode, and a copper-containing solution is obtained after electrolysis;
[0037] 3) electrifying the low-copper solution obtained in step 1) and the c...
Embodiment 2
[0041] The regeneration copper extraction method of the nitric acid etching solution of the present embodiment may further comprise the steps:
[0042] 1) Separating the copper-containing nitric acid etching solution through a vinylpyridine-based strongly acidic cation exchange membrane to obtain a high-copper solution and a low-copper solution, wherein the copper ion concentration in the high-copper solution is 60 g / L, and the copper ion concentration in the low-copper solution The ion concentration is 5g / L;
[0043] 2) adding concentration to the high-copper solution obtained in step 1) is 15% sodium chlorate, the volume of sodium chlorate accounts for 1.2% of the volume of the high-copper solution, and performs primary electrolysis. The temperature is 18°C. After electrolysis, copper ions crystallize into copper plates at the cathode, and a copper-containing solution is obtained after electrolysis;
[0044]3) electrifying the low-copper solution obtained in step 1) and the...
Embodiment 3
[0048] The regeneration copper extraction method of the nitric acid etching solution of the present embodiment may further comprise the steps:
[0049] 1) Separating the copper-containing nitric acid etching solution through a phenolic strong acidic cation exchange membrane to obtain a high copper solution and a low copper solution, wherein the copper ion concentration in the high copper solution is 50g / L, and the copper ion concentration in the low copper solution The concentration is 4g / L;
[0050] 2) adding concentration to the high-copper solution obtained in step 1) is 13% sodium chlorate, the volume of sodium chlorate accounts for 0.8% of the volume of the high-copper solution, and performs primary electrolysis. The temperature is 18°C. After electrolysis, copper ions crystallize into copper plates at the cathode, and a copper-containing solution is obtained after electrolysis;
[0051] 3) electrifying the low-copper solution obtained in step 1) and the copper-containin...
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Abstract
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