发明名称 |
Ozone bleaching with an organic solvent and mineral acid |
摘要 |
A bleached pulp having a high viscosity for a given permanganate number is formed by pretreating never dried pulp with an organic solvent medium to produce a treated pulp composed of said never dried pulp in the medium and then bleaching that treated pulp using ozone at a pH of 1.5-5 to provide a bleached pulp while reducing the viscosity loss during the ozone bleaching step significantly compared to that what would occur if the medium used in the ozone bleaching were water.
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申请公布号 |
US5685953(A) |
申请公布日期 |
1997.11.11 |
申请号 |
US19950489077 |
申请日期 |
1995.06.09 |
申请人 |
MACMILLAN BLOEDEL LIMITED |
发明人 |
SOLINAS, MARCO;MURPHY, THOMAS HOWARD;VAN HEININGEN, ADRIAAN REINHARD PIETER;NI, YONGHAO |
分类号 |
D21C9/10;D21C9/153;D21C9/16;(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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