• 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

Process for inter-polymer membranes for the separation/concentration of value-added chemicals/salts from aqueous/organic medium

  • IPR
    IPR Status & Details:
  • WO 2014080427 A1
Application/Uses/Problem being addressed

For the separation/concentration of value-added chemicals/salts from aqueous/organic medium

Salient Technical Features including Competing Features/ Impact
  • High counter ion transport number >0.95
  • Low water uptake 12-15%
  • High ion exchange capacity 1.30-1.45 meqg-1
  • Stability to pH window 1 to 14
    • TRL Level & Scale of Development:
    TRL 5

    -

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

    The technology is ready for technology transfer and can be implemented on commercial scale

    Environmental Considerations:

    Eco-friendly

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

    Polyethylene, styrene, 4-methyl styrene, benzoyl peroxide, trimethyl amine, chlorosulfonic acid

    Major Plant Equipment and Machinery Required

    Polymer making mixtruder, blow film extruder, glass column

    Techno-Economics

    The manufacturing cost of the membranes ₹2000/m2 while the commercial membranes price are around ₹8000-15000/m2

    Technology Package
  • Preparation of acid and alkali stable polyethylene polystyrene interpolymer based cation exchange membrane
  • Preparation of acid and alkali stable polyethylene poly4-methyl styrene interpolymer based anion exchange membrane
  • Use of these membranes for the recovery and concentration of alkali
  • Use of these membranes for the separation/concentration of value-added chemicals/salts from aqueous/organic medium