发明名称 |
Nitric oxide treatment for ozone bleaching |
摘要 |
A method of bleaching a chemical pulp by adjusting the pH of the pulp to 1.5-3.5, chelating the pulp and then treating the pulp in an N stage with nitric oxide (NO) in the amount of at least 1.5% by weight of the oven dried pulp at a consistency of between 30 and 55% and further treating the pulp in a Z stage with ozone to produce a bleach pulp having a higher viscosity for a given permanganate number compared with a similar pulp bleached without using the N stage.
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申请公布号 |
US5364503(A) |
申请公布日期 |
1994.11.15 |
申请号 |
US19920838169 |
申请日期 |
1992.02.20 |
申请人 |
MACMILLAN BLOEDEL LIMITED |
发明人 |
SOLINAS, MARCO;MURPHY, THOMAS H. |
分类号 |
D21C9/10;D21C9/153;(IPC1-7):D21C9/153 |
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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