As is well known, caustic soda is used in various industries, so its production process varies depending on its use. Today, we will briefly introduce the operation process of diaphragm electrolysis in caustic soda.
1. Diaphragm electrolytic cell This electrolytic cell is a key equipment for the production of caustic soda. During production, due to the high content of calcium and magnesium ions in saltwater, sodium hydroxide forms calcium hydroxide (magnesium) precipitate, and the diaphragm may be blocked. This not only affects production, but also leads to an increase in sodium hydroxide concentration, a decrease in battery current efficiency, and an increase in battery voltage, posing a threat to safety production.
2. The production method of caustic soda membrane for chlorine gas drying and compression is a system that uses 98% sulfuric acid to perform four stage countercurrent drying on the chlorine gas produced by electrolysis, so that the moisture content in the chlorine gas reaches 10ppm.
3. The liquefaction, storage, and packaging of chlorine gas is a system that liquefies and condenses chlorine gas into liquid chlorine, which is transported externally through refining, storage, bottling, or loading.
During the refining and gasification process of liquid chlorine, nitrogen trichloride accumulates. Nitrogen trichloride can branch in the presence of free chlorine, leading to explosive decomposition.
4. Hydrogen washing compression is a system that uses sulfuric acid, sodium hydroxide, sodium thiosulfate, and hydrochloric acid to wash and remove impurities such as ammonia, chlorine, nitrogen trichloride, and oxygen to below 5ppm. After drying, it is pressurized and sent out.
The above is about the membrane production process of caustic soda. You can learn more about it. Once you encounter it during the later use of the product, it can also better help you.
