Method for Drying and Purifying Sodium Chloride Produced in the Production of Polyethylene Polyamines

摘要

The present invention relates to a process for producing polyethylene polyamines and cyclic polyethylene polyamines of the following chain type using ethylene dichloride and anhydrous ammonia as starting materials and to provide a process for producing ethylene polyamine and cyclic polyethylene polyamine by reacting ethylene diamine contained in sodium chloride produced after neutralization of polyethylene polyamine with caustic soda, Characterized in that carbon dioxide is used to convert caustic soda to sodium carbonate at 80-170C.