Copper sulfate (chemical formula: CuSO4), which is a wh […]
Copper sulfate (chemical formula: CuSO4), which is a white or off-white powder. Its aqueous solution is weakly acidic and blue. Copper sulfate is an important raw material for the preparation of other copper-containing compounds. Blended with lime milk to obtain Bordeaux mixture for use as a fungicide. At the same time, copper sulfate is also an electrolyte when electrolytically refining copper.
The common form of copper sulfate is a crystal, copper tetrahydrate sulphate monohydrate ([Cu(H2O)4]SO4·H2O, copper sulfate pentahydrate), which is a blue solid (crystal). The aqueous solution exhibits a blue color due to the hydrated copper ions, so anhydrous copper sulfate is often used to test the presence of water in the laboratory. In actual production and life, copper sulphate is often used to refine copper, and mixed with slaked lime to make pesticide Bordeaux mixture. Copper sulphate is a heavy metal salt, toxic, and the adult lethal dose is 0.9g/kg. If you eat too much, you should immediately eat a lot of protein-rich foods such as milk and egg white, or use EDTA calcium sodium salt to detoxify.
An emetic in the traditional Chinese medicine of copper sulfate. Sexual cold; sour, sin; because it is toxic, misuse, excessive can cause poisoning.
Preparation method of wsdty copper sulfate：
Generally, a waste copper material is dissolved in dilute sulfuric acid to which an oxidizing agent (for example, a 10% hydrogen peroxide solution) is added, and then impurities such as iron are recrystallized and purified, and a large amount of copper sulfate having a high purity can be obtained. The copper sulfate used in the laboratory is generally purchased or purified by dissolving the discarded copper compound in sulfuric acid.
The electrolyte recovery method waste electrolyte (containing Cu50~60g/L, H2SO4180~200g/L) is reacted with the calcined copper mud to make fine copper powder. After the separation of the reaction liquid, the supernatant is cooled, crystallized, separated and dried. Thus, a finished copper sulfate product is obtained.