What is Caustic Soda?

Caustic soda is Sodium hydroxide (NaOH) and may be known as lye. Caustic means burn or corrode organic tissue by chemical action, and caustic soda is a highly caustic alkali that decomposes proteins at ordinary ambient temperatures. It can cause severe chemical burns. It is highly soluble in water and readily absorbs moisture and carbon dioxide from the air.

What is Caustic Soda Liquor used for?

Many industries use caustic soda, and the commonest ones include:

Paper manufacture

Caustic soda along with sodium sulphide is used to pulp the wood and remove the lignin from the cellulose fibres. The result is a brown pulp. This is bleached -and again caustic soda plays a key role in this process.

Water Treatment and purification

Sodium hydroxide is a strong alkali with a pH of 14. It is sometimes used to stabilise acidic waters, correcting the pH to a more neutral level of around pH7. This makes the acidic water less corrosive to plumbing and reduces the amount of lead, copper and other toxic metals that can otherwise dissolve into the water.

Cement, Mortars, Concretes and Grouts

Sodium hydroxide is used in some cement mix plasticisers. This helps homogenise cement mixes, preventing segregation of sands and cement, decreases the amount of water required in a mix and increases the workability of the cement product, be it mortar, render or concrete.

Cleaning Agents

Sodium hydroxide is frequently used as an industrial cleaning agent where it is often called “caustic”. It is added to water, heated, and then used to clean process equipment, storage tanks, etc. It can dissolve grease, oils, fats and protein-based deposits. It is also used for cleaning waste discharge pipes under sinks and drains in domestic properties.

Food preparation

Food preparation using sodium hydroxide includes washing or chemical peeling of fruits and vegetables, chocolate and cocoa processing, caramel colouring production, poultry scalding and soft drink processing.

Industries using caustic soda liquor

Many other industries use caustic soda liquor, mainly to raise the pH of the water. They include:

  • Aerospace – pH balance, plating and anodising
  • Agricultural – effluent treatment and pH balance
  • Automotive – tanker cleaning, effluent treatment, degreasing
  • Chemical / Petrochemical – effluent treatment
  • Cleaning – a powerful cleaner, breaks up dirt and pH adjuster
  • Electronics – effluent treatment, pH balance, plating baths as a cleaner
  • Food & Beverage – pH treatment, cleaning of pipes, peeling of fruit & vegetables
  • Pharmaceuticals – production of pharmaceutical intermediates and water treatment
  • Rubber Industry – effluent treatment and reclaiming rubber
  • Waste Recycling – effluent treatment and water purification

Enduramaxx Sodium Hydroxide Storage Tanks

As you can see, caustic soda needs non-reactive durable tanks. Bunded tanks give extra protection, since any spills are contained. The outer tank has a capacity of at least 110% of the inner tank. Our tanks conform to current regulations.                        Caustic soda is classified as a hazardous substance and must be stored out of direct sunlight. They must have leak-proof fittings, pipes and valves. Our one-piece rotationally moulded tanks are made from non-corrosive highest grade mid-density polyethene.

Bunded Caustic Soda Tanks

Enduramaxx manufactures a complete range of bunded storage tanks for the processing and storage of bulk Sodium Hydroxide. Our bunded tanks have been designed explicitly with pollution control in mind. We offer:

Closed Top Bunded Tanks are available in a wide range of sizes from 400 litres to 30,000 litres. The customisation to a client’s specific requirements is available upon request.

Open Top Bunded Tanks like our closed top bunded tanks, our open-top bunded tanks are also available in a wide range of sizes from 400 litres to 30,000 litres.  We can customise your tanks to your specifications – just give us a ring today.

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