METHOD OF PRODUCING ETHYLENE AND PROPYLENE POLYAMINES Russian patent published in 2017 - IPC C07C209/08 C07C211/10 C07C211/11 C08G73/02 

FIELD: chemistry.

SUBSTANCE: invention relates to an improved method of producing aliphatic di- and polyamines, used in production of corrosion inhibitors, succinimide additives, amine curing agents, ion-exchange resins etc. Method is realised by reacting dichloroethane or 1,2-and 1,3-dichloropropanes and 25–45 % solution of ammonia in molar ratio of reactants of 1:2.2–4 at high temperature and pressure, followed by neutralising obtained reaction mixture. Reaction of dichloroethane or 1,2 and 1,3-dichloropropanes with ammonia is carried out in presence of a stabiliser, in form of 2,6-ditertbutyl-4-methylphenol (ionole) or 2,6-ditretbutylphenol in amount of 0.1 % of weight 1,5-dichloroethane or 1,2 and 1,3-dichloropropanes, and process is first carried out at temperature of 106–110 °C and pressure 0.4–0.8 MPa for 1–1.5 h, reaction mixture is held at 110–140 °C and pressure of 0.6–1.8 MPa for 1-2 hours with intense mixing. Mixing of reaction mixture is primarily performed with rotation frequency 600–3,000 rpm.

EFFECT: method increases output of ethylene and propylene polyamines to 80,6–96,2% due to reduced formation of by-products - ammonium chloride, vinyl chloride, monochloropropenes.

1 cl, 1 tbl, 10 ex