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LANXESS expands range of membranes for reverse osmosis

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LANXESS is expanding its range of membrane elements for reverse osmosis (RO). The new Lewabrane HP (high performance) series comprises elements that consist of an enhanced brackish water membrane to serve applications in which high rejection and energy efficiency are important. Using the new types in combination with monodisperse Lewatit ion exchange resins provides high quality produced water at lower operational cost.

With an average salt rejection of 99.7 per cent and high permeability, the new product types are a further development of the high cross-linked polyamide membrane which LANXESS launched in 2012. Controlling the degree of polyamide cross-linking during production process provides a small effective “pore size” that results in high rejection of solutes, regardless their charge. “By optimisation of the process, the flux could be improved without compromising permeate quality. Therefore, high rejection, even at changing feed parameters like pH or salinity, can be achieved at high flux rate,” explains Dr. Jens Lipnizki, head of Technical Marketing Membranes in the Liquid Purification Technologies business unit.

LANXESS is showcasing its new Lewabrane HP membrane elements for the first time at the Membrane Technology Conference & Exposition, hosted by the American Membrane Technology Association (AMTA) and the American Water Works Association (AWWA) in New Orleans (LA), USA, February 25 to 28, 2019.

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