Process for cleaning or purifying aqueous...

Details Process for cleaning or purifying aqueous... Process for cleaning or purifying aqueous...

B - Operations, Transporting

01

D

B01D 15/02 (2006.01) B01D 15/00 (2006.01) B01D 61/14 (2006.01) C02F 1/28 (2006.01) D01F 13/00 (2006.01) D01F 13/02 (2006.01)

Patent

CA 2056137

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, silica dioxide or alumina adsorbent and filtering, thereby reducing turbidity, eliminating nitrosoamine, decolorizing the solution and removing transition metals like iron therefrom.

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