Triethylenediamine recovery

Details Triethylenediamine recovery Triethylenediamine recovery

C - Chemistry, Metallurgy

07

D

202/57, 260/265.

C07D 487/08 (2006.01)

Patent

CA 1060019

ABSTRACT OF THE DISCLOSURE A process is provided for recovering substantially pure triethylenediamine in liquid propylene glycol solutions directly from a crude triethylenediamine reaction mixture without the need to purify the triethylenediamine by crystal- lization. The process includes initially admixing propylene glycol with a crude triethylenediamine liquid reaction prod- uct mixture. The admixture thus formed is then distilled under conditions such that the triethylenediamine and pro- pylene glycol codistill. The codistillate is then collected as the substantially pure triethylenediamine solute in liquid propylene glycol solution. The collected codistillate being substantially free of reaction by-products can be used directly to catalyze urethane systems.

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