Organic compounds -- part of the class 532-570 series – Organic compounds – Nitrogen attached directly or indirectly to the purine ring...
Patent
1978-09-21
1980-01-08
Tovar, Jose
Organic compounds -- part of the class 532-570 series
Organic compounds
Nitrogen attached directly or indirectly to the purine ring...
C07D29502
Patent
active
041828640
ABSTRACT:
A process is provided for recovering substantially pure triethylenediamine in liquid tertiary amine 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 tertiary amine with a crude triethylenediamine liquid reaction product mixture. The admixture thus formed is then distilled under conditions such that the triethylenediamine and tertiary amine codistill as a substantially pure triethylenediamine solute in liquid tertiary amine solution. The collected codistillate being substantially free of reaction by-products can be used directly to catalyze urethane systems.
REFERENCES:
patent: 3080371 (1963-03-01), Spielberger et al.
Nieh Edward C. Y.
Speranza George P.
Bailey James L.
Kulason Robert A.
Ries Carl G.
Texaco Development Corporation
Tovar Jose
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