1. Copper sulfate method. Reaction equation:
2CuSO+4NaHCO→CuCO·Cu(OH)↓+2NaSO+3CO↑+HO
Method of operation: the baking soda is formulated into a solution having a relative density of 1.05, first added to the reactor, and at 50 ° C, the purified copper sulfate solution is added under stirring to control the reaction temperature at 70-80 ° C, and the reaction is changed to precipitate. The peacock is green and the pH is maintained at 8. After the reaction, it is allowed to stand and settle. It is washed with 70-80 ° C water or deionized water until the washing liquid has no SO, and then separated by centrifugation and dried to obtain basic copper carbonate. Finished product.
2. Copper nitrate method. Operation method: electrolytic copper reacts with concentrated nitric acid to form copper nitrate, and then reacts with a mixture of sodium carbonate and sodium hydrogencarbonate to form basic copper carbonate, and the precipitate is washed, separated and dehydrated, and dried to obtain a basic copper carbonate product.
3. Using copper nitrate and sodium carbonate as raw materials, prepare the amount of copper nitrate trihydrate and sodium carbonate aqueous solution, and stir while mixing. At this time, a blue-green colloidal precipitate is formed, and stirring is continued at room temperature to form crystals. The substance is filtered and dried in air. You can get the product of the composition.
Alternatively, the same desired product can be obtained by using copper sulfate pentahydrate or copper acetate monohydrate and potassium carbonate as raw materials.
4. In a large hard glass tube, seal the amount of the material such as copper nitrate and calcium carbonate powder, install a mercury pressure gauge, and heat to melt the material in the tube. When the generated carbon dioxide pressure reaches 505 to 808 kPa, a product having a composition of 2CuCO·Cu(OH) is produced.
5. Add the copper sulfate solution to a 50% aqueous solution of sodium bicarbonate with stirring:
The reaction temperature is 70-80 ° C, the addition rate of copper sulfate is not suitable for the foam generated by the generated CO, and the reaction liquid is kept at pH=8. After the reaction is finished, the reaction liquid is boiled for 10 to 15 minutes, and the basic copper carbonate will be rapidly formed. Precipitate. After standing, the upper layer solution is clarified and separated, and the precipitate is washed with 70-80 ° C water or deionized water until no SO ions are contained, and then separated by centrifugation, and dried at 80-100 ° C.
6. Copper is used as a positive electrode, placed in a concentrated aqueous solution of sodium carbonate, and electrolyzed by direct current, and basic copper carbonate is formed on the positive electrode.