• CSIR - Central Salt & Marine Chemicals Research Institute
  • G20
Membranes, Resins & Materials for water desalination, water purification and separation processes

Title of Process/ Know-how/ Product/Design/Equipment

Conversion of low valued salt into high valued salt (KCl to K2SO4/KNO3 or NH4NO3 to KNO3, and similar cases) by ionic metathesis using electrodialysis

  • IPR
    IPR Status & Details:
  • NA
Application/Uses/Problem being addressed

CSIR-CSMCRI has developed electrodialysis technology for conversion of low valued salt into high valued salt using indigenously developed ion-exchange membranes by ionic metathesis.

Salient Technical Features including Competing Features/ Impact
  • All components such as ion-exchange membranes, electrodes are indigenously available.
  • Ground water or municipal water may be taken as feed water.
  • High rate of conversion.
  • Maintenance cost: Negligible
    • TRL Level & Scale of Development:
    TRL 4

    -

    Business scope & opportunity (in terms of scale, cost, market etc.):

    Electrochemical conversion of molecules is of significance in particular in fertilizer segment.

    Environmental Considerations:

    Eco-friendly

    Status of Licensing:
    Not yet licensed
    Status of Commercialization:
    Not applicable
    Major Raw Materials Needed

    Low value salts and water

    Major Plant Equipment and Machinery Required

    Membrane casting facilities, and a workshop

    Techno-Economics

    Depends on the scale of operation; Will be available on request

    Technology Package
  • Electrodialysis unit for ionic metathesis
  • Demonstration of the process