Gacl-Nalco Alkalies & Chemicals Pvt. Ltd.

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Caustic Soda

Sodium hydroxide (NaOH), commonly known as Caustic Soda, is a strong base and is one of the most widely used chemicals in the industry either as a raw material or as an auxiliary chemical. Caustic soda is produced by the electrolysis of brine. In the electrolytic cell, brine (sodium chloride solution) is decomposed to chlorine at the anode and to a sodium hydroxide solution and hydrogen at the cathode. About 200 TPD of caustic soda will be purchase by NALCO; the rest can be supplied as 48% lye (liquid) or as flakes (solid).

Applications of caustic soda

  • Water demineralisation: regeneration of ion exchangers
  • Rayon industry: preparation of spinning solutions
  • Pharmaceutical industry: various products, including sodium lactate
  • Cooking oils and fats: refining and purification
  • Production of starches and derivatives
  • Petroleum industry: refining and desulfurisation
  • Steel production: ammonia recovery in cokes production
  • Waste-water treatment: pH-correction, flocculant enhancers
  • Dairy and beverages: bottle-cleaning, cleaning production installations


Chlorine is one of the basic building blocks of our planet. Since chlorine is very active chemically, it is found in nature only in combination with other elements. Chlorine is produced as a co-product in the production of caustic soda by electrolysis of brine. Chlorine is supplied as gas through pipelines and as liquid in 900 Kg, 100 Kg and 50 Kg containers.

Applications of chlorine

  • As disinfectant in drinking water and in swimming pools
  • As bleaching agent in textiles and paper industry
  • As oxidising agent in pharmaceuticals industry
  • for use in construction, automotive, electronic and electrical industries.
  • In the production of plastics, such as PVC, Poly-Urethanes, Epoxy-resins, Teflon, Neoprene etc
  • In the production of chloromethanes, paints, insecticides etc


Hydrogen is one of the most abundant elements on earth, mostly in the form of chemical compounds such as water and hydrocarbons. We produce hydrogen as a co-product in the production of caustic soda by electrolysis of brine. Hydrogen is supplied as gas through pipelines and as compressed gas in 5,6,7 Nm3 cylinders/cylinder banks

Applications of hydrogen

  • As hydrogenating agent in food processing
  • In Hydrogen peroxide production and hydrochloric acid production
  • As fuel; zero emission
  • Ammonia Synthesis
  • Methanol production.
  • Industrial use as rotor coolant

Hydrochloric Acid/ Hydrogen chloride

Hydrogen chloride (HCl) is a colorless gas. Its aqueous solution is known as Hydrochloric Acid. Hydrogen chloride or hydrochloric acid is produced by burning hydrogen and chlorine together. Hydrogen chloride is supplied as gas through pipelines and as acid/30% solution in bulk containers as well as 25, 50 Kg containers.

Applications of hydrochloric acid

  • Cleaning and pickling of metals
  • Ion exchange regeneration
  • pH regulation and neutralization of process streams
  • Acidizing of oil wells
  • Processing of textiles
  • Food processing
  • Manufacture of chloro-organic compounds and polymers such as PVC, chlorinated rubber etc.

Sodium hypochlorite

Sodium hypochlorite (NaOCl) commonly known as soda bleach is produced by adding chlorine into caustic soda solution. It is an excellent steriliser, oxidiser and decolouring agent, and also acts as a germicide, fungicide and deodorant. The chemical is used as a bleaching agent for rayon pulp, paper and fabrics and for industrial water treatment and pool chlorination. It also finds application as a food additive.

Applications of Sodium hypochlorite

  • Bleaching agent for rayon pulp and paper, cotton, linen and jute
  • Disinfectant and deodorant in dairies and creameries (sterilisation)
  • Water treatment (chlorination)
  • Household bleach
  • Pool chlorination
  • Fly control (sterilisation)
  • Germicide
  • Fungicide
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