Process for purifying an aqueous solution of N-methyl-morpholine

Details Process for purifying an aqueous solution of N-methyl-morpholine Process for purifying an aqueous solution of N-methyl-morpholine

1990-10-11

1991-10-01

Silverman, Stanley S.

Liquid purification or separation

Processes

Ion exchange or selective sorption

210681, 210683, B01D 1504

Patent

active

050531387

ABSTRACT:
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

REFERENCES:
patent: 4196282 (1980-04-01), Franks
patent: 4426228 (1984-01-01), Brandner
patent: 4581072 (1986-04-01), Laity
patent: 4880469 (1989-11-01), Chanzy et al.

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