There are requirements that require copper to be dissolved. Depending on the process, this creates different copper salts or copper sulphate. We have summarized for you in this guide which methods are available for dissolving copper and what must be observed.
Solve copper for different reasons
Copper is a non-ferrous metal that is widely used. However, it may now be necessary to loosen the copper for various reasons:
- Also read - pouring copper
- Also read - copper grinding
- Read also - Pressing copper
- Copper should be separated from other metals
- copper sulfate is required
- the or certain copper salts are required
Separate copper from other metals
The separation of other metals is not possible with conventional methods (oxidizing acids) if the other metals are to be preserved. Because usually the copper is the nobler metal. This means that the other, less noble metals would dissolve before the copper. So a process must be used that is also used to dissolve copper for the purpose of obtaining copper sulfate.
Dissolve copper to extract copper sulfate
Copper sulfate can be produced relatively easily by dissolving copper in hydrogen peroxide. The chemical equation for this is: Cu (copper) + H2SO4 (sulfuric acid) + H2O2 (hydrogen peroxide) leads to CuSO4 (copper sulfate) + 2 H2O (double water molecules). The sulfuric acid should be concentrated 30 to a maximum of 50 percent, the hydrogen peroxide maximum 30 percent.
2.2 ml of 50 percent or 4.0 ml of 30 percent sulfuric acid are required per gram of copper, as well as at least 1.8 g of hydrogen peroxide, but preferably 2 g. Since there would be a violent exothermic reaction if everything were poured onto the copper immediately, the solution is introduced in up to 10 steps. Wait three to five minutes in between to prevent the solution from boiling.
Now the solution is left to stand overnight in order to stir it again the next day to loosen the last copper residues. Then the solution is filtered through a paper filter into its own container. The copper sulfate crystals are then rinsed with ethanol alcohol (spirit) until it runs clear through the filter. The copper sulphate is now dried.
Dissolve copper to extract copper salts
The procedure for obtaining the copper salts is similar. Instead of sulfuric acid, any other acid (hydrochloric acid (6.95 € on Amazon *), acetic acid, formic acid) is used, otherwise it remains with hydrogen peroxide. 3 ml hydrochloric acid (33 percent) or 1.7 ml 50 percent acetic acid would be used per gram of copper. Hydrogen peroxide in the amount already mentioned.Tips & Tricks Acids are not only used to dissolve copper. You can also use acids to etch copper.