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For the demineralization of water in the production of ultra pure water (UPW) (> 18 MOhm*cm at 25°C).
Lewatit® UltraPure 1296 MD is a ready-to-use mixed bed comprising a gel type strongly acidic cation exchange resin (SAC, Lewatit® UltraPure 1216 MD), and a gel type, strongly basic anion exchange resin (SBA, type I, Lewatit® UltraPure 1243 MD), individually with a monodispersed bead size distribution (uniform particles) based an a styrene-divinylbenzene copolymer for the use in polishing systems for the production of ultra pure water.
The monodisperse beads (uniformity coefficient: max. 1.1) are chemically and osmotically highly stable. The optimized kinetics lead to an increased operating capacity, and the very low content of fines also results in a low pressure drop compared to ion exchange resins with heterodisperse bead size distribution.
Lewatit® UltraPure 1296 MD is correspondingly adjusted to the total capacity of the individual components to an equivalent ratio of 1:1. The smaller bead size of the SAC contributes to better mixing properties.
Lewatit® UltraPure 1296 MD is highly regenerated and specially cleaned for meeting the specifications of the semiconductor industry. Leaching of organics from Lewatit® UltraPure 1296 MD into the treated water is reduced to a level less than 1.0 ppb, and its resistivity achieves a level higher than 18MΩ.cm.
