Lewatit® NM 91 is a premium grade, gel type, high capacity, high purity mixed ion exchange resin prepared with a unique volumetric ratio of 55% gel, strong acid resin, and 45% gel, Type 1 strong base anion resin. lt is a mixture of standard cross-linkage gel type cation exchange resin in the hydrogen (H) form, and a gel type, strong base anion exchanger resin in the hydroxide (OH) form. The mixed resin is prepared from component resins which have been manufactured with a high degree of purity and conversion to the H / OH form.

Lewatit® NM 91 is characterized by high cation exchange capacity. lt is supplied pre-mixed as spherical beads in a heterodisperse particle distribution in the fully swollen bead form.

Lewatit® NM 91 is specially designed for water demineralization applications with high Alkalinity to FMA ratlos, where complete removal of silica and CO2 is not required.

The resin mixture is designed for non-regenerable application.

lt also can be used for demineralization of service water, waste water and water recovery in small units and once-through cartridges (DI water) for:

  • EDM recycling
  • Alkaline feed demineralization
  • Laboratories and photo laboratories
  • Household appliances (e.g. steam irons, air humidifier)
  • Small industrial plants (e.g. refilling of starter batteries or coolant circuits)
  • Water for watering
Product Group: Mixed Bed
  • Chemical Industry
  • Demineralization
  • Desalination
  • Energy
  • Industrial water
  • Power generation
  • Process water
  • Raw water
  • Water Treatment

Technical Data sheet

Safety data sheet

Legal Area Language Legal Entity


Firuza Mir
Commercial Contact

Phone: +1 412 736 0534
Fax: +1 412 736 0534

Worldwide - Firuza Mir