METHOD OF PURYFYING AQUEOUS SOLUTIONS OF N-METHYLMORPHOLINE N-OXIDE

To purify aqueous solutions of N-methylmorpholine N-oxide, in particular spinning bath solutions, the invention provides that the solutions are brought into contact with adsorbents and then subjected to filtration. The adsorbent employed is preferably alumina, silica or carbon. The adsorbents prefer...

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Bibliographische Detailangaben
Hauptverfasser:	ZIKELI STEFAN, MAENNER JOHAN, EICHINGER DIETER, ASTEGGER STEFAN, FIRGO HEINRICH, WOLSCHNER BERND, WEINZIERL KARIN
Format:	Patent
Sprache:	eng
Schlagworte:	APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS CHEMISTRY HETEROCYCLIC COMPOUNDS MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OFARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES ORRIBBONS METALLURGY NATURAL OR ARTIFICIAL THREADS OR FIBRES ORGANIC CHEMISTRY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION SPINNING TEXTILES TRANSPORTING TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Beschreibung
Zusammenfassung:	To purify aqueous solutions of N-methylmorpholine N-oxide, in particular spinning bath solutions, the invention provides that the solutions are brought into contact with adsorbents and then subjected to filtration. The adsorbent employed is preferably alumina, silica or carbon. The adsorbents preferably have a particle size < 0.15 mm. The presence of adsorbents facilitates the filtration of the substances causing turbidity and, in addition to decolorisation, effects the removal of metal salts.