Treatment method for acidic waste etching solution
A technology of acid etching waste liquid and its treatment method, which is applied in the field of electrolysis, can solve the problems of long process flow, excessive use of auxiliary materials, unfavorable safety and environmental protection, etc., and achieve the effects of short process flow, reduced increment, and environmental protection
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Embodiment 1
[0048] In the acidic etching waste solution of manufacturer A, the concentration of copper ions is 123g / l, and the acidity is 1.8N.
[0049] Acidic etching waste solution from electrolysis manufacturer A: During the electrolysis process, the anode reacts: 2Cl - -2e-=Cl 2 ; Reaction occurs at the cathode: Cu 2+ +e-=Cu + , Cu + +e-=Cu, after the electrolytic extraction of copper, the electrocleaning liquid is obtained, the copper content in the electrolytic liquid is 15g / L, and the acidity is 1.8N.
[0050] Take 2L of the electro-clear liquid and concentrate it under reduced pressure at a vacuum degree of 0.06mPa and a temperature of 70-90°C. First distill the electro-clear liquid to 1L to obtain 1L of the first distilled water. The acidity of the first distilled water is 0.08N Continue to distill the electroclean liquid to 500mL to obtain the second distilled water of 500mL and the concentrated solution of 500mL, the acidity of the second distilled water is 2.2N.
[0051] ...
Embodiment 2
[0055] In the acidic etching waste solution of manufacturer B, the concentration of copper ions is 130g / l, and the acidity is 1.8N.
[0056] Acidic etching waste solution from electrolysis manufacturer B: During the electrolysis process, the anode reacts: 2Cl --2e-=Cl 2 ; Reaction occurs at the cathode: Cu 2+ +e-=Cu + , Cu + +e-=Cu, after the electrolytic extraction of copper, the electrolytic solution is obtained, the copper content in the electrolytic solution is 10g / L, and the acidity is 1.8N.
[0057] Take 2L of the electro-clear liquid and concentrate it under reduced pressure at a vacuum degree of 0.075mPa and a temperature of 60-80°C. Distill the electro-clear liquid to 1L first to obtain 1L of the first distilled water. The acidity of the first distilled water is 0.08N Continue to distill the electroclean liquid to 500mL to obtain the second distilled water of 500mL and the concentrated solution of 500mL, the acidity of the second distilled water is 2.2N.
[0058]...
Embodiment 3
[0062] In the acidic etching waste solution of manufacturer C, the concentration of copper ions is 121g / l, and the acidity is 1.8N.
[0063] Acidic etching waste solution of electrolysis factory C: During the electrolysis process, the anode reacts: 2Cl - -2e-=Cl 2 ; Reaction occurs at the cathode: Cu 2+ +e-=Cu + , Cu + +e-=Cu, after the electrolytic extraction of copper, the electrocleaning liquid is obtained, the copper content in the electrolytic liquid is 5g / L, and the acidity is 1.8N.
[0064] Take 2L of the electro-clear liquid and concentrate it under reduced pressure at a vacuum degree of 0.085mPa and a temperature of 50-70°C. First distill the electro-clear liquid to 1L to obtain 1L of the first distilled water. The acidity of the first distilled water is 0.08N Continue to distill the electroclean liquid to 500mL to obtain the second distilled water of 500mL and the concentrated solution of 500mL, the acidity of the second distilled water is 2.2N.
[0065] Cool 50...
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