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Information at a Glance

  • Sodium silicate, also known as water glass or liquid glass, available in aqueous solution and in solid form, is a compound used in cements, passive fire protection, refractories, textile and lumber processing.
  • Sodium silicates are solids where the proportion between silicon, oxygen and sodium determines what will be the resulting silicate(s). They are based on the silicone atom ability to coordinate four oxygen atoms in a tetraeder.


The major process steps of manufacture of sodium silicate are:

  •  Mixing of soda ash and silica sand

  •  Fusing of mixer in furnace for 12 to 16 hours at about 1200 to 14000C

  •  Drawing of fused melt into RCC Tank

  •  Cooling by spraying of cold water

  •  Dissolving of sodium silicate fragments with preheater steam

  •  Clarification/ setting of dissolved sodium silicate to a desired gravity by mixing with

  •  Hot water

  •  Packing in drums


  • Sodium Silicate find its application in:
  • Detergent Industry
  • Civil Engineering
  • Chemical grouting
  • Ceramic Industry
  • Paper and cardboard industry


  • A variety of solid-state NMR techniques were applied in order to assign resonances in the 29Si and 23Na NMR spectra of a new crystalline silicate to crystallographically distinct silicon and sodium sites, respectively.

  • Rapid advances are occurring in core design and production because of the need for reducing foundry and machining scrap and the need for binders that are environmentally friendly.


    1999: 1,215 thousand short tons; 2000: 1,225 thousand short tons; 2004: 1,260 thousand short tons, projected. Demand equals production plus imports (1999: 30 thousand s.t.; 2000: 44 thousand s.t.) less exports (1999: 59 thousand s.t.; 2000: 49 thousand s.t.).

    Historical (1995 - 2000): -0.3 percent per year; future: 0.7 percent per year through 2004.

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