Sodium hydroxide (NaOH)

Sodium hydroxide, also known as caustic soda, has the chemical formula NaOH and is a white solid with a melting point of 1390°C and a density of 2.13 g/cm3. This substance quickly absorbs moisture from the air and must be protected during transportation. The largest amount of sodium hydroxide produced is obtained through the electrolysis process of sodium chloride solutions in one of the types of electrolytic vessels.

Applications

It is used in the oil and petrochemical industries, steel and aluminum industries, detergent and soap industries, textile industries, and chemical industries, including in the production of chemicals, rayon, pulp and paper, in the production of paints, aluminum, petrochemicals, and textiles, soaps, and detergents.

Maintenance risk

  • This compound is corrosive in contact with the skin and care must be taken when using it to avoid its burning effects. It is also very toxic and dangerous if swallowed.
  • If not stored at a certain temperature, it will turn into a crystalline solid.
  • The liquid soda is slippery and easily leaks through cracks.

Maintenance method in plastonic tanks

  • By using plastic tanks, the risks of storing this dangerous chemical liquid can be reduced. The key to storage is to store it in safe and strong tanks.
  • Since this substance is highly corrosive, the use of a secondary tank is essential.
  • Sodium hydroxide can be stored in any concentration in polyethylene tanks.
  • The storage temperature should not exceed 37 degrees Celsius and should not be less than 10 degrees Celsius.
  • The material of the connections used in the tanks to store this substance is polyethylene and polyvinyl chloride, and gaskets made of ethylene propylene diene monomer are used for sealing.
 Resin typeDensityConnection materialGasket material
Sodium hydroxide 50%Polyethylene13 /2 g/cm3PVC-PPEDPM

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