Color stabilization of amines

Details Color stabilization of amines Color stabilization of amines

2007-01-30

2007-01-30

Manoharan, Virginia (Department: 1764)

Distillation: processes, separatory

Addition of material to distilland to inhibit or prevent...

C203S038000, C203S059000, C203S078000, C564S497000

Reexamination Certificate

active

10456655

ABSTRACT:
The present invention concerns a process for providing tertiary amine products which are color-stable, and have a greatly reduced tendency to take on color during their storage. According to the invention, an ethyleneamine derivative is added to the distillation pot prior to or during the distillation of the tertiary amine product. Preferably, the ethyleneamine derivative has a higher boiling point than the desired tertiary amine product so as to preclude the ethyleneamine from distilling over with the tertiary amine.

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patent: 4414879 (1995-11-01), None
patent: 0 028 555 (1983-06-01), None

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