Triethylenediamine recovery

Details Triethylenediamine recovery Triethylenediamine recovery

1975-03-17

1976-11-23

Rizzo, Nicholas S.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07D47108

Patent

active

039936511

ABSTRACT:
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 crystallization. The process includes initially admixing propylene glycol with a crude triethylenediamine liquid reaction product mixture. The admixture thus formed is then distilled under conditions such that the triethylenediamine and propylene 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.

REFERENCES:
patent: 2950282 (1960-08-01), Farkas
patent: 3045018 (1962-07-01), Mascioli
patent: 3120525 (1964-02-01), Muhlbauer et al.
Houdry Process Corp., Chemical Abstracts, vol. 58, p. 8903d, (1963).

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