What is Caustic Soda Flake?
At room temperature, sodium hydroxide is a white crystalline odorless solid that absorbs moisture from the air. It is a manufactured substance. When dissolved in water or neutralized with acid it liberates substantial heat, which may be sufficient to ignite combustible materials. Sodium hydroxide is very corrosive. It generally uses as solid or 50% solution. Other common names include caustic soda and lye. Caustic Soda Flake is used in soap, rayon, paper, explosives, dyestuffs, and petroleum products. It used in processing cotton fabric, laundering and bleaching, metal cleaning. Also processing, oxide coating, electroplating, and electrolytic extracting. It is commonly present in commercial drain and oven cleaners.
Caustic Soda Flake Grades:
Caustic soda can be found in liquid or solid form (Caustic Soda flake, granules or micro-pearls.) Both forms have the same chemical formula and the same applications; therefore, they are interchangeable.Before working with caustic soda, it is important to use a surgical mask to avoid inhaling it. Latex or gardening-type gloves should also be used, as well as safety glasses.
NaOH Flake Grades specification:
How to using Caustic Soda Flakes:
Water amount who used in a Pyrex-type flask should be cold, because the temperature will rise. Measure the caustic soda flake and add it to the water, taking care to do this neither too fast nor too slow. The soda should be sprinkled because it will sink to the bottom quickly. Always add the soda to the water, never vice versa.
Using a Teflon-type spoon, stir slowly without shaking or whisking. A hard layer will form at the bottom and the solution will become cloudy. This is normal. Never use a shaker or blender for soda.
Let the solution stand for a few minutes, then continue stirring and gradually everything will dissolve and the solution will become clearer. The final state of the solution will always be clear.
It should be prepared just before use at recommended temperature. It shouldn`t be to cool. If it cools completely, it will absorb carbon dioxide from the surrounding environment and will form a layer of sodium carbonate that will cloud the solution.
Caustic Soda in water purification add directly to well water. By neutralizing acid water, it prevents the destruction of pipes and pumps during transportation to the refinery. So, adding Caustic Soda in water purification, to acidic water reduces the acids in water.
Consequently, Caustic Soda prevent the corrosion of the pipes and water transport system. In conclusion this reduction in corrosion helps to neutralize hard constituents and prepares water for the next steps of purification.