Cradle to Gate
Identity ID
a992482c-f67c-4f3a-8809-4a86cb828766
Materials
Associated ID
0129a34e-81c4-4e54-be10-cf9f1b69217d
Included activities starts
Included activities ends
Description
Silver nitrate is an important deep-processing product of silver, commonly used in fields such as the electronics industry, catalysts, the manufacture of photographic negatives, mirror making, electroplating, electronic pastes and pharmaceuticals; the dataset contains the main raw and auxiliary materials, energy consumption and the three wastes 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 taken from the literature; the production activities of this product include oxidation, hydrolysis, evaporation and crystallisation, and drying.
Activity Description
The production process of this product includes oxidation, hydrolysis, evaporation crystallization, drying and other steps.
Process Description
The chemical formula of silver nitrate is AgNO3, CAS number is 7761-88-8. It is a colorless and transparent orthorhombic flaky crystal. It is easily soluble in water and ammonia, soluble in ether and glycerin, slightly soluble in absolute ethanol, and almost insoluble in concentrated nitric acid. Silver nitrate is an important product of silver deep processing and is commonly used in the electronic industry, catalysts, making photographic films, mirror making, electroplating, electronic slurries, medicine and other fields.
Time period
2020
2026
Geography
China
Geography comment
China is one of the major producers and consumers of silver nitrate in the world. The explosive growth of the photovoltaic industry is the main driving force for the demand for silver nitrate, because silver nitrate is a key raw material for manufacturing conductive silver paste for solar cells.
Macroeconomic value
Business-as-Usual
Data validation
Yes
Technology
Current Technology
Technology comment
Rinse the silver with pure water, place it in the reaction kettle, add an appropriate amount of deionized water, raise it to the specified temperature, and gradually add nitric acid. In the reaction kettle, silver reacts with nitric acid to generate silver nitrate. When the reaction between nitric acid and silver is completed, the temperature is raised to drive out excess nitric acid, silver oxide is added to adjust the pH value, and an appropriate amount of deionized water is added to adjust the specific gravity of the silver nitrate solution. Other metal ions in the solution undergo hydrolysis reactions with water to form water-insoluble hydroxide precipitates. After filtration, the filtered silver nitrate solution enters the evaporation equipment to be concentrated, evaporated, crystallized, and dried into finished silver nitrate. The silver oxidation reaction equation is as follows: Ag+2HNO3 (concentrated) =AgNO3+NO2↑+H2O↑; 3Ag+4HNO3 (dilute)=3AgNO3+NO↑+2H2O.