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Electrolytic purification of copper: A blister copper (99% copper) is previously made into a thick plate as an anode, and pure copper is used as a thin piece as a cathode. A mixed solution of sulfuric acid (H2SO4) and copper sulfate (CuSO4) is used as an electrolyte. After energization, copper dissolves from the anode into copper ions (Cu) and moves to the cathode. After reaching the cathode, electrons are obtained and pure copper is precipitated at the cathode (also called electrolytic copper). Impurities in blister copper, such as iron and zinc that are more reactive than copper, dissolve into ions (Zn and Fe) along with copper. Since these ions are not easily precipitated as compared with copper ions, it is possible to prevent the precipitation of these ions on the anode by properly adjusting the potential difference during electrolysis. Inactive impurities such as gold and silver deposited on the bottom of the electrolytic cell than copper. The copper plate produced in this way is called “electrolytic copper†and is of high quality and can be used to make electrical products. Precipitating at the bottom of the electrolyzer is called “anolyte mudâ€, which is rich in gold and silver. It is very valuable, and it has extremely high economic value to take out and reprocess it. The electrolytic copper can be further processed to produce a very fine electrolytic copper powder. Electrolytic copper powder is a light rose red dendritic powder, easily oxidized in a humid air, soluble in hot sulfuric acid or nitric acid. Electrolytic copper powder uses: widely used in diamond tools, electric carbon products, friction materials, conductive inks and other powder metallurgy products.