Membrane Technology Forum
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Membrane Technology Forum
Register Today!


Membrane Technology Forum

Henia Pransky
Vice President of Technology, Koch Separation Solutions

Henia has been active in the membrane field for over 25 years, starting as an R&D engineer, working through different disciplines to her current role of managing membrane and product development and field implementation for water and wastewater applications as well as the process separation markets. Henia has an M.Sc. degree in chemical engineering from the Technion, the Israeli Institute of Technology.

 

Innovative Reverse Osmosis Membranes for Concentration of Caustic Solutions

Sodium hydroxide (caustic) is widely used in different applications as a cleaner, sanitizer, or a reagent to dissolve impurities from different products. In many cases the caustic solution is diluted after use via rinse cycles or different reactions. While pH stable membranes are readily available to remove suspended and soluble contaminants from spent caustic, reuse of the dilute chemical could only be viable if the cleaned caustic solution could be concentrated back to high strength. An innovative reverse osmosis membrane has been developed, providing cost competitive technology to concentrate dilute sodium hydroxide solutions from 0.5-1% to a practical concentration for reuse. This product provides a complementing solution to the well-established SelRO® NF product line for caustic purification. The new membrane will be presented, along with potential applications and process considerations.


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