BY: JUAN GONZALEZMEEN 3344

DOWEX 21K XLT Anion Exchange Resin

What Is It

It is a Type I Strong Base Resin Contains quaternary

methylamines producing functionalities which give it the ability to exchange anions.

When in the OH ionic form, this class of resin acts like a very strong insoluble base in solution

Water 55 – 65 % Styrene 35 – 45 % Divinylbenzene Copolymer Ethylstyrene Copolymer Chloromethyl Trimethylamine

functionalized in the chloride form

Physical & Chemical Properties

Physical State: Solid BeadsColor: White to YellowOdor: AmineSpecific Gravity: 1.06 – 1.10Solubility in Water: insoluble in waterpH: essentially neutralParticle Size: 0.3 – 1.2 mm

What Its Used For

This specific type of resin is used in uranium recovery.

Other types of resins are used for other types of metals depending on the nature of reaction.

Uranium comes from the well field, enters anion exchange columns where it is mixed with the resin and is cleaned from the mud and sulfuric acids.

Resin regeneration is completed through elution.

References

DOWEX Ion Exchange Resins, A Powerful Chemical Processing Tool. Dow Liquid Seperations. The DOW Chemical Company. 2002

Material Safety Data Sheet. DOWEX 21K XLT Anion Exchange Resin. The DOW Chemical Company. 2007