A kind of method that reclaims palladium chloride in waste colloidal palladium activation solution
A technology of colloidal palladium activation and palladium chloride, which is applied to the improvement of process efficiency, instruments, electrolytic components, etc., can solve the problems of cumbersome palladium recovery process, high recovery cost and low recovery efficiency, so as to improve social and economic benefits and environment Benefits, high recovery rate, pollution reduction effect
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Embodiment 1
[0046] A method for reclaiming palladium chloride in waste colloidal palladium activation solution, comprising the steps:
[0047] S1: Pretreatment of waste colloidal palladium activation solution: take 250mL of waste colloidal palladium activation solution, then add 1.42g of sodium thiocyanate and 0.33g of sodium sulfite, and age at 35°C for 12 hours to remove copper; Add 20mL of aqua regia to the colloidal palladium activation solution, and heat at 100°C for 3 minutes for oxidative gel breaking treatment, and wait for the solution to cool to room temperature;
[0048] S2: performing liquid film extraction on the waste colloidal palladium activation solution after S1 pretreatment to obtain an aqueous solution rich in palladium; the liquid film extraction includes the following steps:
[0049] (1) 9% N503 extractant (9% refers to N503 extractant accounts for 9% of the membrane phase volume, the same below, and the balance is sulfonated kerosene), 4% Span80, 2% liquid paraffin ...
Embodiment 2
[0061] A method for reclaiming palladium chloride in waste colloidal palladium activation solution, comprising the steps:
[0062] S1: Pretreatment of waste colloidal palladium activation solution: take 250mL of waste colloidal palladium activation solution, then add 1.42g of sodium thiocyanate and 0.33g of sodium sulfite, and age at 35°C for 12 hours to remove copper; Add 20mL of aqua regia to the colloidal palladium activation solution, and heat at 100°C for 3 minutes for oxidative gel breaking treatment, and wait for the solution to cool to room temperature;
[0063] S2: performing liquid film extraction on the waste colloidal palladium activation solution after S1 pretreatment to obtain an aqueous solution rich in palladium; the liquid film extraction includes the following steps:
[0064] (1) Mix 5% N503 extractant (5% means that N503 extractant accounts for 5% of the membrane phase volume, the same below, and the balance is sulfonated kerosene), 6% Span80, 5% liquid para...
Embodiment 3
[0076] A method for reclaiming palladium chloride in waste colloidal palladium activation solution, comprising the steps:
[0077] S1: Pretreatment of waste colloidal palladium activation solution: take 250mL of waste colloidal palladium activation solution, then add 1.42g of sodium thiocyanate and 0.33g of sodium sulfite, and age at 35°C for 12 hours to remove copper; Add 20mL of aqua regia to the colloidal palladium activation solution, and heat at 100°C for 3 minutes for oxidative gel breaking treatment, and wait for the solution to cool to room temperature;
[0078] S2: performing liquid film extraction on the waste colloidal palladium activation solution after S1 pretreatment to obtain an aqueous solution rich in palladium; the liquid film extraction includes the following steps:
[0079] (1) Mix 7% N503 extractant (7% means that N503 extractant accounts for 7% of the membrane phase volume, the same below, the balance is sulfonated kerosene), 2% Span80, 1% liquid paraffin...
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