AMINE RECOVERY

摘要

Ethylene amines are manufactured by a process wherein ethylene dichloride is reacted with ammonia and the mixture is stripped of unreacted ammonia. Sodium hydroxide equivalent to the chloride present is added and large quantities of sodium chloride result. Part of the ethylene amines product is lost when this salt is separated from the product amines. Recovery of the ethylene amines from the salt and production of a substantially amine-free salt is accomplished by the disclosed process involving the recrystallization of the process salt to recover the amines and produce a salt free of organic pollutants.