What chemical is used for regeneration of anion resin?

What chemical is used for regeneration of anion resin?

sodium hydroxide
The anion exchange resins are generally regenerated with sodium hydroxide (48% w/v rayon grade in lye form (as per IS: 252) solution of suitable strength.

Which solution is used for regeneration of cation exchange resin?

The strong acid cation exchanger resin is regenerated with sulphuric or hydrochloric acid, which effectively strips off the calcium, magnesium and sodium from the resin, substituting hydrogen. Hydrochloric acid is typically applied at between 4 and 6%.

How long does it take for cation resin to regenerate?

Recycling between cation resin and anion resin will remove any remaining regenerant chemical. After rinsing, the resin bed is returned to service. The total time to regenerate is < 2 hours and the total water used is about 7 x the resin volume: 15L bed = 105L (50 gal.

Can a cation or anion resin be scaled?

Resin regeneration is a complex calculation, and the outcome often depends on the overall resin condition, regeneration process water quality, regenerant chemical concentration, flow rate, temperature, and contact time, to name a few. Both cation and anion resin can be scaled from improper regeneration.

How is a regenerant solution injected into anion resin?

The regenerant solution is injected into the IX column at a low flow rate to allow adequate contact time with the resin. The regeneration process is more complex for mixed bed units that house both anion and cation resins.

How are cation exchange resins replaced in water?

At this stage, the resin will be replaced by a fresh resin, or regenerated. If you replace all cations dissolved in water by H+ ions and all anions by OH– ions, these will recombine and form new molecules of water. To do this, you need a cation exchange resin in the H form and an anion exchange resin in the OH form.