发明名称 |
PROCESSO PARA A PURIFICACAO DE SOLUCOES AQUOSAS DE N-METILMORFOLINA-N-OXIDO |
摘要 |
<p>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.</p> |
申请公布号 |
PT99598(A) |
申请公布日期 |
1992.10.30 |
申请号 |
PT19910099598 |
申请日期 |
1991.11.25 |
申请人 |
LENZING AKTIENGESELLSCHAFT |
发明人 |
DIETER EICHINGER;KARIN WEINZIERL;JOHANN MANNER;STEFAN ZIKELI;BERND WOLSCHNER;HEINRICH FIRGO;STEFAN ASTEGGER |
分类号 |
B01D37/02;B01D15/00;C02F1/28;C07D295/22;D01D1/02;D01F2/00;D01F13/02;(IPC1-7):C07D295/00 |
主分类号 |
B01D37/02 |
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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