LEWATIT® MDS TP 260

Product Description

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 (UO₂ ²⁺) > 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 Fe³⁺-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.

Note:
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