METHOD OF AMINE PRODUCTION Russian patent published in 2015 - IPC C07C209/08 C07C211/10 C02F1/461 

FIELD: chemistry.

SUBSTANCE: obtained as a result of the interaction an aminohalogenhydrate solution is processed with an alkali with the further evaporation and rectification. Sewage water, which represents a light fraction, formed on an upper plate of a rectification column and contains about 2% of ammonia and about 1% of ethylenediamine, is subjected to electrochemical processing in a three-chambered membrane electrolyser with ion-exchange membranes with the current density 130-500 A/m² with the supply of sewage water into an anode chamber, the alkali into a cathode chamber, and water into a middle chamber. A concentrated solution of ethylenediamine with ammonia is separated from the middle chamber and directed to obtaining a water ammonia solution, used in the production of amines. The method makes it possible to reduce the volume of sewage waters, eliminate the loss of amines and ammonia with sewage waters. The amines and ammonia are separated almost completely. Sewage waters can be discharged into a plant sewage system without dilution.

EFFECT: method improvement.

1 dwg, 3 tbl, 3 ex