Regeneration of acidic cationic exchange resin used in the...

Details Regeneration of acidic cationic exchange resin used in the... Regeneration of acidic cationic exchange resin used in the...

B - Operations, Transporting

01

D

23/346, 362/41

B01D 53/14 (2006.01) B01J 39/04 (2006.01) B01J 49/00 (2006.01)

Patent

CA 2028427

Case No. 8163 REGENERATION OF ACIDIC CATIONIC EXCHANGE RESIN USED IN THE REACTIVATION OF SPENT ALKANOLAMINE Abstract Spent aqueous alkanolamine solution containing free alkanolamine, alkali metal salts of anions which form heat stable salts with such alkanolamine and heat stable alkanolamine salts is reactivated by contacting the solution with an acidic cation ion exchange resin to remove alkali metal cations and alkanolamine cations resulting from (1) protonation of free alkanolamine with hydrogen on the resin and (2) the alkanolamine salts, followed by eluting the resin with aqueous ammonia to preferentially displace alkanolamine from the resin and thereafter eluting the resin with a dilute mineral acid to displace the ammonia, metal cations and any remaining alkanolamine. The displaced alkanoamine is recovered for reuse. The aqueous ammonia may also be recovered for reuse.

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