The basic copper carbonate has a blue or green color […]
The basic copper carbonate has a blue or green color depending on the composition (as explained above). It is an amorphous powder with fine particles and a density of 3.85. It is insoluble in cold water and alcohols, soluble in acids and forms corresponding copper salts, and soluble in aqueous solutions of cyanide, sodium hydroxide, ammonium salts and carbonates of alkali metals to form copper complexes. When boiled in an alkali metal carbonate solution, brown copper oxide is formed and decomposes into black copper oxide at 200 ° C. It is unstable in a hydrogen sulfide atmosphere. There are more than a dozen compounds in basic copper carbonate according to the ratio of CuCO₃: H₂O.
In industrial production, its molecular formula is CuCO₃ · Cu (OH) ₂ · xH₂O. The solubility in water is 0.0008%, and its decomposition temperature is 200-220 ° C. Low toxicity.
Thermal decomposition: CuCO₃ = CuO + CO₂ ↑
Generate basic copper carbonate in contact with water 2CuCO3 + H2O = Cu2 (OH) 2CO3 + CO2 ↑
Also, it should be not that the reaction mixture of sodium carbonate and copper salt is a mixture of basic copper carbonate and copper hydroxide. The specific composition depends on the reaction conditions, which is caused by the intense hydrolysis of sodium carbonate.
Uses of copper carbonate:
It is used in the preparation of various copper compounds in the inorganic salt industry, as an organic synthesis catalyst in the organic industry, as an additive for copper in the electroplated copper-tin alloy industry, and as a desulfurizer for crude oil storage. Wood preservation and other fields.
Used in pyrotechnics, pesticides, pigments, and other industries and manufacturing copper compounds.