It is related to a process for purifying organic amines. The process comprises (a) providing an organic amine to a first vessel (5), the organic amine having a normal boiling point at one bar; (b) filling the first vessel (5) with inert gas; (c) heating the organic amine in the first vessel (5) to a sub-boiling temperature, wherein the sub-boiling temperature is at least 15° C. less than the normal boiling point; (d) cooling the vapor from the first vessel (5) in a second vessel (20) to provide a liquid; and (e) contacting the organic amine with a resin polymer matrix, wherein the resin polymer matrix is embedded with an amino compound selected from the group consisting of iminodiacetic acid, aminomethylphosphonic acid or a combination thereof.