发明名称 |
VERFAHREN ZUR REINIGUNG WAESSERIGER LOESUNGEN VON N-METHYLMORPHOLIN-N-OXID |
摘要 |
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. |
申请公布号 |
AT392776(B) |
申请公布日期 |
1991.06.10 |
申请号 |
AT19890002373 |
申请日期 |
1989.10.16 |
申请人 |
LENZING AKTIENGESELLSCHAFT |
发明人 |
KORGER DIETMAR;EICHINGER DIETER;ASTEGGER STEPHAN;WEINZIERL KARIN;MAENNER JOHANN |
分类号 |
B01D15/04;B01J41/04;D01F2/02;D01F13/02 |
主分类号 |
B01D15/04 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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