Process for purifying triethylenediamine

Details Process for purifying triethylenediamine Process for purifying triethylenediamine

1978-12-21

1980-11-11

Niebling, John F.

Organic compounds -- part of the class 532-570 series

Organic compounds

Nitrogen attached directly or indirectly to the purine ring...

C07D48700

Patent

active

042334470

ABSTRACT:
A process is provided for recovering substantially pure triethylenediamine in liquid lower alkylene diol solutions directly from the crude triethylenediamine reaction mixture without resort to a need to purify the triethylenediamine by crystallization. The process includes initially admixing a lower alkylene diol with a crude triethylenediamine liquid reaction product mixture. The admixture thus formed is then heated to remove water and other low boiling impurities. The crude triethylene diaminediol bottoms mixture is then codistilled to recover a pure triethylene diamine product in diol solvent which can be used directly to catalyze urethane systems.

REFERENCES:
patent: 3055809 (1962-09-01), Lichtenwalter
patent: 3080371 (1963-03-01), Spielberger
patent: 3993651 (1976-11-01), Keating

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