• 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

Electro-deionization unit for producing ultrapure water

  • IPR
    IPR Status & Details:
  • WO 2014/080427A1; US 2015/0298116A1
Application/Uses/Problem being addressed

Ultrapure water (resistivity: 18.2 MΩ cm; pH: 7.0) and 10-50 litre per hour using indigenously developed ion-exchange membranes for electronics, pharmaceuticals and other niche applications

Salient Technical Features including Competing Features/ Impact
  • All components such as ion-exchange membranes, resins, electrodes are indigenously available.
  • Continuous regeneration of mixed bed resin
  • Steady quality control for the product water (resistivity: 18.2 MΩ at 25 oC; TOC: 1 ppb; pH: 7.00 flow rate: 15 LPH).
  • Ground water or municipal water may be taken as feed water
  • High percentage of water recovery
  • Maintenance cost: Negligible
    • TRL Level & Scale of Development:
    TRL 8

    -

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

    Use of ultrapure water is on continuous increase. Emphasis on indigenous production of such units, which are currently served from international players, provides opportunity for Atma Nirbhar Bharat.

    Environmental Considerations:

    Eco-friendly

    Status of Licensing:
    Licensed technology
    Status of Commercialization:
    Not yet commercialized
    Major Raw Materials Needed

    Ground/surface water

    Major Plant Equipment and Machinery Required

    Membrane casting facilities, and a workshop

    Techno-Economics

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

    Technology Package

    • Design for electro-deionization unit for producing ultrapure water (resistivity: 18.2 MΩ cm.)

    • Process for ion-exchange membrane

    • Demonstration of the process