Technology Details

Area of Technology:Chemical and Allied

Title of the Innovation: Sodium thiocyanate solvent recovery from acrylic industrial process solution by nanofiltration technology

Brief About Innovation

Acrylic fibre industry generating huge amounts of aqueous effluent stream containing 10-12% sodium thiocyanate (NaSCN) solvent along with color imparting ions, salts and organic compounds such as β-sulfo propionic acid, β-sulfo propionitrile. Membrane based nanofiltration (NF) technique for recovering NaSCN from the industrial process solution.

Salient Technical Features including Competing Features:

• A five-stage NF operation of 4000-6000 L/day feed capacity has been designed and commissioned at CFCL.
• The process showed more than 90% impurity removal with > 99% NaSCN recovery.
• The operating cost per m3 of permeate generated was half of the conventional Gel Filtration Process.
• The process developed was eco-friendly, efficient and cost-effective

Level/Scale of Development: Pilot Scale

IP Status: Patent Granted in US, Morocco, Indonesia, Turkey

Environmental Considerations: No environmental issues involved in the process

Status of Commercialization: Technology transferred

Major Raw Materials to be Utilized: Industrial Effluent, Prefilters, Membrane Modules and Cleaning Chemicals

Major Plant Equipment and Machinery Required: Raw Water Pump, High Pressure Pump, Pressure Vessels, Pressure Gauges, Rotameters, Prefilters, Membrane Modules, Storage tanks.

Techno-Economics: Technically and economically feasible as it is being produced by industry

Technology Package: Can be made available upon request

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