Cradle to Gate
Identity ID
47d64b8d-5c35-4188-8c10-195c9be25172
Materials
Associated ID
2d0968a7-530d-43d7-99df-01c017900645
Included activities starts
Included activities ends
Description
Basic copper carbonate is widely used in industries such as catalysts, pyrotechnics, pesticides, pigments, feed, fungicides, electroplating and anti-corrosion, as well as the manufacture of copper compounds; Basic copper carbonate is modelled as a pure substance; when modelling this substance the user needs to add a solvent of their choice in the model; the dataset contains the main raw and auxiliary materials, energy, atmospheric emissions and wastewater of the production process, and infrastructure such as the manufacture of production equipment and the construction of plant buildings is not included within the dataset boundary; the data inventory is formed by merging data from multiple sources; the production activities of this product include carbonated ammonia reserve, copper conversion, ammonia distillation, centrifugation and ammonia absorption.
Activity Description
The production activities of this product include carbonized ammonia water storage, copper vaporization, ammonia evaporation, centrifugation and ammonia absorption and other processes.
Process Description
Basic copper carbonate chemical formula Cu2(OH)2CO3, CAS number 12069-69-1, is the main component of malachite in nature. It is usually green to blue-green powder or crystal, odorless and fine in texture. It is insoluble in water and ethanol, easily soluble in dilute acid and releases carbon dioxide gas. It reacts with hydrochloric acid and sulfuric acid to form corresponding copper salts. It has relatively stable chemical properties and is not easy to deteriorate at room temperature. It will decompose when heated to about 220°C to produce copper oxide, water and carbon dioxide, and its color gradually turns black. Industrially, it is mainly used in the pigment industry (as green pigment), pesticide field (preparation of fungicides); also used in the electroplating industry (used for electroplating copper or preparing electroplating solution), catalyst synthesis (as a catalyst for organic reactions), and used in pharmaceutical intermediates and feed additives (to supplement copper elements). It is also an important raw material for the preparation of other copper compounds.
Time period
2021
2026
Geography
China
Macroeconomic value
Business-as-Usual
Data validation
Yes
Technology
Current Technology
Technology comment
The carbonized ammonia water method is one of the classic routes for the domestic industrial production of basic copper carbonate, with a market share of approximately 40%–45%, and is a mainstream process at the industrial level. This data set represents this mainstream technology: put electrolytic copper into a copper bath, add prepared carbonized ammonia water, react with air, then filter the solution, heat the filtrate to 75-100°C, and pyrolyze to generate basic copper carbonate precipitate. After centrifugation, washing and drying, the finished product is obtained. The core reaction chemical equation of this process is: NH3↑+ CO2↑+ H2O → NH4HCO3; 2Cu + 6NH3 + 2NH4HCO3 + O2 → 2Cu(NH3)4CO3 + 2H2O; 2Cu(NH3)4CO3 + 2H2O → CuCO3·Cu(OH)2↓+ (NH4)2CO3+6NH3; (NH4)2CO3 → 2NH3↑+ CO2↑+ H2O.