FIELD: purification methods in chemical industry. SUBSTANCE: solution of N- hydroxy-N-methylmorpholine, in particular exhausted coagulating bath from production of cellulose shaped products is brought in contact with adsorption substance, which is then filtered off with pollution substances. As adsorption substance, alumina, silica, or activated carbon with grain size less than 0.15 mm can be used. Filtration may be carried out by inwash method, dynamic filtration with through flow or using cellulose as auxiliary means. EFFECT: enhanced efficiency of process. 5 cl, 5 tbl
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