Patent ID: 7172744

Claim:
A process for manufacturing hydroxylamine comprising the following steps: (a) feeding an aqueous feed solution comprising hydroxylammonium ion and contaminants into a container containing at least one cation exchange resin to form a hydroxylammonium ion loaded resin; (b) feeding a water wash into said container to wash said loaded resin to remove said contaminants to form a purified hydroxylammonium ion loaded resin having said wash water associated therewith; (c) feeding an aqueous solution comprising hydroxylamine into said container to displace at least a portion of said associated wash water from said purified loaded resin to form a hydroxylamine solution associated resin; (d) feeding an aqueous desorbent into said container to desorb said hydroxylammonium ion from said associated resin to form an unbound hydroxylamine containing aqueous solution; (e) feeding a rinse water feed into said container to remove said unbound solution from said container to form a pure and concentrated aqueous solution comprising said hydroxylamine, and wherein step (c) is conducted prior to step (d).