发明名称 |
Method of bleaching paper pulp |
摘要 |
<p>Paper pulp, especially recycled paper pulp which has been deinked, is bleached in a synergistic two-stage process first with sodium bisulfite and then with sodium borohydride. The borohydride is preferably added in an aqueous mixture with sodium hydroxide. A weak acid such as acetic acid may be added to the pulp to advance further the brightness gain.</p> |
申请公布号 |
EP0587270(B1) |
申请公布日期 |
1997.11.12 |
申请号 |
EP19930304507 |
申请日期 |
1993.06.10 |
申请人 |
MORTON INTERNATIONAL, INC. |
发明人 |
WANG, DAVID L.K.;MEYERS, PATRICK |
分类号 |
D21C;D21C5/02;D21C9/10;(IPC1-7):D21C9/10 |
主分类号 |
D21C |
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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