Question

process of regeneration of anion and cation exchange resin in brief with equation

Answer 1

Anion resins may be either strongly or weakly basic. Strongly basic anion resins maintain their positive charge across a wide pH range, whereas weakly basic anion resins are neutralized at higher pH levels.[3] Weakly basic resins do not maintain their charge at a high pH because they undergo deprotonation.[3] They do, however, offer excellent mechanical and chemical stability. This, combined with a high rate of ion exchange, make weakly base anion resins well suited for the organic salts.

For anion resins, regeneration typically involves treatment of the resin with a strongly basic solution, e.g. aqueous sodium hydroxide. During regeneration, the regenerant chemical is passed through the resin, and trapped negative ions are flushed out, renewing the resin exchange capacity.

Cation-exchange resin[edit]

Formula: R−H

Reaction:

R−H + C+ = R−C + H+.Anion-exchange resin[edit]

Formula: N(R)4−OH

Reaction:

N(R)4−OH + HCl = N(R)4Cl + H2O.

Anion-exchange chromatography makes use of this principle to extract and purify materials from mixtures or solutions.