• CSIR - Central Salt & Marine Chemicals Research Institute
  • G20
Salt and Marine Chemicals

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

Production of industrial grade high purity salt from sea water/subsoil and lake brines suitable for chlor-alkali manufacture

  • IPR
    IPR Status & Details:
  • US 8021442B2, US 8282690B2
Application/Uses/Problem being addressed

For production of salt to be used as raw material in chlor alkali industries

Salient Technical Features including Competing Features/ Impact

The process is an improvement over the existing process of producing salt of high purity from alum-treated brine. More particularly, the invention rectifies the ratio of Ca2+ to Mg2+ from a value <1 to a value in the range of 2-3 desired by chlor-alkali and soda ash industries.

TRL Level & Scale of Development:
TRL 7
Business scope & opportunity (in terms of scale, cost, market etc.):

The technology is ready for technology transfer and can be implemented on commercial scale. The product has high demand in chlor-alkali industrial sector.

Environmental Considerations:

Eco-friendly

Status of Licensing:
Transferred
  • DCM Shriram Consolidated Ltd, New Delhi
  • Grasim Industries Ltd, Chemical Division, Birlagram, Nagda
  • DCW Ltd., Tuticorin, Tamil Nadu
    • Status of Commercialization:
    Commercialized
    Major Raw Materials Needed

    Sea/Subsoil brine, flocculating agents, mineral acid

    Major Plant Equipment and Machinery Required

    Material handling equipment such as pumps, belt conveyors, ridger, harvesters, loaders, crushers, tractors, trailers, Washery etc.

    Techno-Economics

    To be worked out based on proposed capacity.

    Technology Package
  • Collection of brine samples and their physical and chemical characterization.
  • Characterization of soil samples and assessing its suitability for construction of salt works.
  • Assessment of percolation of brine through the soil based on the soil characteristics.
  • Assessment of the quality and yield of salt likely to be produced in the area based on the initial brine density and chemical composition.
  • Study of possibilities of inundation of the area during monsoon with an aim to assess the suitability of the land for construction of salt works.
  • Preparation of feasibility report based on the above-mentioned study.
  • Design and lay-out of solar salt works
  • Demonstration of solar salt production process
  • License fee and other financial details would be provided on specific request