Preparation technology of potassium aurous cyanide
A technology of potassium aurous cyanide and preparation process, which is applied in the field of gold plating, can solve the problems of high requirements for stirring and high requirements on raw materials, and achieves the effects of avoiding local high temperature, low ionic conductivity and increasing processing capacity
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[0028] Example 1
[0029] (1) Cleaning of gold flakes: take 20kg gold flakes, generally use international No. 1 gold, cut the gold flakes into small pieces, first soak the gold flakes in dilute nitric acid for 20 minutes to remove the oxide layer on the surface of the gold flakes, and then use Rinse the surface of the gold piece with pure water and dry it;
[0030] (2) Electrochemical dissolution: Put the dried gold pieces in a titanium basket, put the titanium basket into the mother liquor tank of the electrolytic cell, use the dried gold pieces as anode, stainless steel as cathode, and cyanide Potassium solution is anolyte, the mass concentration of potassium cyanide solution is 35%, the weight of potassium cyanide in potassium cyanide solution is 12kg, and potassium hydroxide solution is used as catholyte, and the mass concentration of potassium hydroxide solution is 20-40 %, the cathode and the anode are separated by a diaphragm. The diaphragm is preferably a perfluorinated io...
Example Embodiment
[0034] Example 2
[0035] (1) Cleaning of gold flakes: take 20kg gold flakes, generally use international No. 1 gold, cut the gold flakes into small pieces, first soak the gold flakes in dilute nitric acid for 25 minutes to remove the oxide layer on the surface of the gold flakes, and then use Rinse the surface of the gold piece with pure water and dry it;
[0036] (2) Electrochemical dissolution: Put the dried gold pieces in a titanium basket, put the titanium basket into the mother liquor tank of the electrolytic cell, use the dried gold pieces as the anode, stainless steel as the cathode, and cyanide The potassium solution is the anolyte, the mass concentration of the potassium cyanide solution is 37%, the weight of potassium cyanide in the potassium cyanide solution is 10.8 kg, and the potassium hydroxide solution is used as the catholyte, and the mass concentration of the potassium hydroxide solution is 20- 40%, the cathode and anode are separated by a diaphragm. The diaphrag...
Example Embodiment
[0040] Example 3
[0041] (1) Cleaning of gold flakes: take 20kg gold flakes, generally use international No. 1 gold, cut the gold flakes into small pieces, first soak the gold flakes in dilute nitric acid for 30 minutes to remove the oxide layer on the surface of the gold flakes, and then use Rinse the surface of the gold piece with pure water and dry it;
[0042] (2) Electrochemical dissolution: Put the dried gold pieces in a titanium basket, put the titanium basket into the mother liquor tank of the electrolytic cell, use the dried gold pieces as the anode, stainless steel as the cathode, and cyanide The potassium solution is the anolyte, the mass concentration of the potassium cyanide solution is 40%, the weight of potassium cyanide in the potassium cyanide solution is 10.0kg, and the potassium hydroxide solution is used as the catholyte, and the mass concentration of the potassium hydroxide solution is 20- 40%, the cathode and the anode are separated by a diaphragm, the diaph...
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