Diethylenetriamine CAS:111-40-0

nature
Yellow hygroscopic transparent viscous liquid with pungent ammonia odor, flammable and strongly alkaline. Soluble in water, acetone, benzene, ether, methanol, etc., insoluble in n-heptane, and corrosive to copper and its alloys. Melting point -35℃. Boiling point 207℃. Relative density o. 9586. Flash point 94℃. Refractive index 1. 4810. This product has the reactivity of secondary amines and easily reacts with a variety of compounds. Its derivatives have a wide range of uses.

Preparation method
It can be obtained by ammoniation of dichloroethane. 1,2-Ethyl chloride and ammonia water are sent into a tubular reactor to perform a hot-pressure ammoniation reaction at a temperature of 150-250°C and a pressure of 392.3kPa. The reaction solution is neutralized with alkali to obtain mixed free amines, which are concentrated while removing sodium chloride. The crude product is then distilled under reduced pressure and the fraction between 195 and 215°C is intercepted to obtain the finished product. This method co-produces ethylenediamine, triethylenetetramine, tetraethylenepentamine and polyethylenepolyamine at the same time. It can be obtained by controlling the temperature of the distillation tower to distill the amine mixture and intercepting different fractions for separation.

use
This product is mainly used as a solvent and organic synthesis intermediate, and can be used to prepare epoxy resin curing agents, gas purifiers (for CO2 removal), lubricating oil additives, emulsifiers, photographic chemicals, surfactants, and fabric finishing agents. , paper enhancer, aminocarboxylic complexing agent, metal chelating agent, heavy metal hydrometallurgy and cyanide-free electroplating diffusion agent, brightener, and synthetic ion exchange resin and polyamide resin, etc.