Process for cleaning or purifying aqueous N-methylmorpholine-N-o

Details Process for cleaning or purifying aqueous N-methylmorpholine-N-o Process for cleaning or purifying aqueous N-methylmorpholine-N-o

1991-11-22

1993-01-12

Cintins, Ivars

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

210663, 210688, 210777, B01D 1500

Patent

active

051787644

ABSTRACT:
An aqueous N-methylmorpholine-N-oxide solution which was used as a spinning bath in the production of cellulosic products is regenerated by contacting it with active coal, silicon dioxide or alumina adsorbent and filtering, thereby reducing turbidity, eliminating nitrosoamine, decolorizing the solution and removing transition metals like iron therefrom.

REFERENCES:
patent: 2697724 (1954-12-01), Collier
patent: 4851128 (1989-07-01), Rose
patent: 5053138 (1991-10-01), Korger et al.

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