发明名称 |
Process for bleaching of lignocellulose-containing pulp. |
摘要 |
<p>The present invention relates to a process for bleaching of lignocellulose-containing pulp, in which the pulp is treated at a pH between about 1 and about 7 in the presence of a magnesium compound, whereupon the pulp is washed and subsequently bleached with a peroxide-containing compound. The initial treatment removes from the pulp those trace metal ions that have a negative effect on the subsequent bleaching with a peroxide-containing compound. Owing to the presence of magnesium ions in dissolved form during the initial treatment, the magnesium ions are retained in those positions in the pulp where they have a particularly positive effect on the effectiveness of the bleaching stage.</p> |
申请公布号 |
EP0595386(A1) |
申请公布日期 |
1994.05.04 |
申请号 |
EP19930202821 |
申请日期 |
1993.10.04 |
申请人 |
EKA NOBEL AB |
发明人 |
HOLTINGER, LILLEMOR;HERMANSSON, WENCHE;ANDERSSON, LENNART;BASTA, JIRI;LINSTEN, MAGNUS |
分类号 |
D21C9/147;D21C9/10;D21C9/16;(IPC1-7):D21C9/10 |
主分类号 |
D21C9/147 |
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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