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Title:
METHOD FOR PURIFYING AQUEOUS SOLUTION OF N-METHYL-MORPHOLINE N-OXIDE
Document Type and Number:
Japanese Patent JPH03137943
Kind Code:
A
Abstract:

PURPOSE: To use an aq. soln. of N-methyl-morpholine N-oxide as a complete fresh soln. for cellulose spinning by bringing the aq. soln. into contact with an anion exchanger contg. specified functional groups and separating the purified aq. soln. from the anion exchanger.

CONSTITUTION: An aq. soln. of N-methyl-morpholine N-oxide to be purified, in particular a spinning bath soln. incurred in the production of a cellulose product is brought into contact with an anion exchanger contg. quat. tetraalkylammonium groups of the formula -CH2H+(CH3)3X- or -CH2 N+[(CH3)2(CH2OH)]X- (where X- is an anion of an inorg. or org. acid) as functional groups and the purified aq. soln. is separated from the anion exchanger. The anion exchanger is regenerated with an acidic aq. soln. and the anion X- is derived from a volatile acid, in particular carbonic acid, formic acid or acetic acid. The purified aq. soln. is concd. and used for preparing a fresh soln. for cellulose spinning.


Inventors:
DEIITOMAA KORUGAA
DEIITAA AIHINGAA
SHIYUTEFUAN ASUTETSUGAA
KARIN BUAINTSUIIRU
YOHAN MENNAA
Application Number:
JP1990000278829
Publication Date:
June 12, 1991
Filing Date:
October 16, 1990
Export Citation:
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Assignee:
CHEMIEFASER LENZING AG
International Classes:
B01D15/04; B01J41/04; D01F2/02; D01F13/02; (IPC1-7): B01J41/04; D01F2/02