Process for purifying hexamethylenediamine

Details Process for purifying hexamethylenediamine Process for purifying hexamethylenediamine

C - Chemistry, Metallurgy

07

C

260/612.5

C07C 209/84 (2006.01) C07C 211/12 (2006.01)

Patent

CA 1175072

TITLE Process For Purifying Hexamethylenediamine ABSTRACT OF THE DISCLOSURE Hexamethylenediamine (HMD) is purified by dissolving ammonia in crude molten HMD under pressure, directing the solution thus prepared to a reduced pressure zone where the ammonia is vaporized thereby causing a portion of the HMD to crystallize following which the crystals in the slurry are washed with essentially pure HMD. This purified HMD is suitable for conversion into polyamide fibers.

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