Menetelmä N-metyylimorfoliini-N-oksidin vesiliuosten puhdistamiseksi

There is disclosed a process for purifying aqueous solutions of N-methyl-morpholine N-oxide (NMMO), such as spinning bath solutions incurred in the production of cellulose products, in which process the solutions to be purified are contacted with an anion exchanger and the purified solutions are sep...

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Bibliographische Detailangaben
Hauptverfasser:	MAENNER,JOHANN, KORGER,DIETMAR, ASTEGGER,STEFAN, WEINZIERL,KARIN, EICHINGER,DIETER
Format:	Patent
Sprache:	fin ; swe
Schlagworte:	APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY NATURAL OR ARTIFICIAL THREADS OR FIBRES PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION SPINNING TEXTILES THEIR RELEVANT APPARATUS TRANSPORTING
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Beschreibung
Zusammenfassung:	There is disclosed a process for purifying aqueous solutions of N-methyl-morpholine N-oxide (NMMO), such as spinning bath solutions incurred in the production of cellulose products, in which process the solutions to be purified are contacted with an anion exchanger and the purified solutions are separated from the anion exchanger. The process is carried out in one step and the anion exchanger, as functional groups, exclusively contains quaternary tetraalkylammonium groups of the formulae -CH2-N(+)(CH3)3X(-) or -CH2-N(+)[(CH3)2(CH2OH)]X(-) wherein X(-) represents the anion of an inorganic or organic acid. After this, the anion exchanger is regenerated with an aqueous acidic solution.