Wastewater Treatment Process in Manufacturing Polyethylene Polyamines

摘要

The present invention relates to a method for treating wastewater generated in the production of polyethylene polyamines, and more particularly, to prepare chain-type polyethylene polyamines and cyclic polyethylene polyamines using ethylene dichloride and anhydrous ammonia as raw materials. The method for treating wastewater generated in the concentration process of caustic soda due to the water produced after neutralization of polyethylene polyamines and the product purification process, and the waste water is fractionated by distillation using 5-30% by weight of hydrochloric acid. A wastewater treatment method characterized by conversion to ammonium chloride.