Method of producing linear plyethylenimine

Details Method of producing linear plyethylenimine Method of producing linear plyethylenimine

C - Chemistry, Metallurgy

08

G

402/364

C08G 73/04 (2006.01)

Patent

CA 1065538

ABSTRACT OF THE DISCLOSURE Ethylenimine or oligomers thereof are polymerized in the presence of various cationic catalysts (taken in an amount of from 0.1 to 1.0 mol.% per each elementary unit) in mass at a temperature of from 40° to 55°C till about 10-25% conversion ratio of the ethylenimine cycles is reached, thereafter the polymerization process is inhibited with an alkali, the unused monomer (or oligomer) is distilled off, water is added in an amount of from 0.3 to 3.5 parts per each part of the oligomeric residue, and the polymerization process is completed at a temperature of from 5° to 25°C. The precipitate of the linear polyethylenimine crystallohydrate is separated, washed with water and dehydrated by way of drying in vacuum at a temperature within the range of from 40° to 100°C.

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