Project:Deactivating a ferric chloride solution: Difference between revisions
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Project:Deactivating a ferric chloride solution (view source)
Revision as of 14:35, 27 May 2010
, 27 May 2010→In practice
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* Method | * Method | ||
Pour | Pour the spent Ferric Chloride solution in a plastic bucket - do not use metal buckets, add about 5 times its volume of water. | ||
Dissolve | Dissolve 222 grams of Sodium Hydroxide in about 3 litres of water. | ||
In a thin stream, add the Sodium Hydroxide solution to the Ferric Chloride and stir. Once it turns rust coloured it is ready to be | In a thin stream, add the Sodium Hydroxide solution to the Ferric Chloride and stir. Once it turns rust coloured it is ready to be | ||
discarded. | discarded. | ||
If not discarded, on standing, the Iron Hydroxide will separate out at the bottom, while at the top, a crust of copper carbonate CuCO3 will | If not discarded, on standing, the Iron Hydroxide will separate out at the bottom, while at the top, a crust of copper carbonate CuCO3 will form due to the copper from etched circuits. | ||
form due to the copper from etched circuits. | |||
The iron hydroxide at the bottom is a standard commercial pigment and can be separated off the solution and added to latex paint. | The iron hydroxide at the bottom is a standard commercial pigment and can be separated off the solution and added to latex paint. | ||
