发明名称 |
PROCESS FOR DELIGNIFYING RAW CELLULOSE |
摘要 |
A process for delignifying raw cellulose which comprises a preliminary treatment for impregnating raw cellulose with a monopersulphuric acid solution, a successive filtration without washing with recycle of the filtered liquid to the first step, and a treatment, at low temperature and in alkaline solution at a pH higher than 9, of the previously impregnated raw cellulose in order to permit the reaction of the monopersulphuric acid with the lignin contained in the raw cellulose.
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申请公布号 |
CA2088281(A1) |
申请公布日期 |
1993.08.01 |
申请号 |
CA19932088281 |
申请日期 |
1993.01.28 |
申请人 |
AUSIMONT S.P.A. |
发明人 |
MARZOLINI, FAUSTO;CALMANTI, GIULIO;SACCHI, GIANPIERO |
分类号 |
D21C9/10;D21C9/16;(IPC1-7):D21C3/02 |
主分类号 |
D21C9/10 |
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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