LANXESS new ion exchange resin for water softening

LANXESS is adding Lewatit S1567 Scopeblue to its portfolio of ion exchange resins. The strongly acidic cation exchange resin — which the specialty chemicals company produces in a solvent-free process — is used for softening drinking water in industrial plants and in standard household filter cartridges.

Lewatit S1567 Scopeblue is characterised by its high resistance to disinfectants (Image: LANXESS)

The monomer used in Lewatit S1567 Scopeblue is styrene — which is derived from renewable or waste-based feedstocks — namely tall oil fatty acids. This makes it possible to replace more than 90% of fossil raw materials and reduce the CO2 footprint by up to 76% compared with conventionally produced resins.

The LANXESS site in Bitterfeld, Germany, received ISCC PLUS certification in January 2024, a requirement for offering the resin as a Scopeblue variant.

The LANXESS Liquid Purification Technologies (LPT) business unit has been offering various Scopeblue grades in addition to its conventional Lewatit resins since November 2022. For this purpose, the ion exchange resin production at the Leverkusen site was ISCC PLUS certified at the beginning of 2022. The current product range includes three weak acid cation exchangers (WAC) based on acrylate and one strong acid cation exchanger (SAC) based on polystyrene.

Dr Stefan Neufeind, head of LPT technical marketing, said, “With our new Scopeblue products, we are, for the first time, offering ion exchange resins with improved carbon footprint, underlining our role as a pioneer in climate-friendly solutions.