Lewatit® MDS TP 260 is a weakly acidic, macroporous cation exchange resin with chelating amino methyl phosphonic acid groups designed for the selective removal of heavy metal and alkaline earth cations. lt is a small bead variant of Lewatit® MonoPlus TP 260 with excellent kinetic performance. Divalent cations are removed from neutralized waters in following order (decreasing affinity):

Uranium (U022+ > Lead > Copper > Zinc > Nickel > Cadmium > Cobalt » Calcium > Magnesium > Strontium > Barium >» Sodium.

The monodisperse, uniform sized beads of Lewatit® MDS TP 260 are mechanically and osmotically more stable than ion exchange resin beds with a heterodisperse bead size distribution. Additionally they offer superior kinetic behavior which leads to faster uptake of cations and a better utilization of capacity. Due to its modified polymer structure and substitution grade it is suitable for the following applications:

  • fine polishing of brine fed to chloralkali membrane cells, e.g. by removal of Ca2+, Mg2+, Ba2+, Sr2+; in the absence of Fei3+-ions
  • antimony (Sb) and tungsten (Bi) removal from copper containing electrolyte
  • uranium (U) removal from crude phosphoric acid
  • titanium (Ti) removal from recycled battery acid
  • aluminum (Al) removal from urea solutions
  • lead (Pb) and strontium (Sr) removal from BF,- containing waste water out of PCB production
  • removal of iron(II), nickel and zinc from 5 % gluconate containing liquid metal working solutions

Smaller bead size requires adaption of the linear velocity and duration for backwash, downflow conditioning and suspended solid load control.


In secondary brine purification of brine fed to chloralkali electrolyzer membranes Lewatit® MDS TP 260 offers following advantages compared to the standard Lewatit® MonoPlus TP 260 and Lewatit® TP 260:

  • up to 100 % higher operating capacity without requiring additional regenerant chemicals
  • lower leakage levels
  • improved Strontium and Barium removal efficiency
Product Group: Cationic
  • Chemical Industry
  • Flue Gas
  • Industrial water
  • Metal industry
  • Mining
  • Paper industry
  • Process water
  • Purification
  • Recycling
  • Removal
  • Rinse water
  • Softening
  • Waste water treatment
  • Water Treatment

Technical Data sheet

Safety data sheet

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