发明名称 |
Hot water extraction for pulp bleaching sequences |
摘要 |
The use of hot water extraction (pH 7-8, 165 DEG F.) in place of an alkaline extraction in pulp bleaching sequences between an ozone delignification stage alkaline wash and a brightening stage allows higher strength pulp to be achieved at essentially the same brightness levels using reduced overall amounts of bleaching chemicals. In addition, effluents from pulp washing stages following these treatments can be recycled without generating scale in process equipment because the solubility of salts that could form such scale is significantly greater in these effluents. |
申请公布号 |
SE9801460(D0) |
申请公布日期 |
1998.04.24 |
申请号 |
SE19980001460 |
申请日期 |
1998.04.24 |
申请人 |
UNION CAMP PATENT HOLDING INC |
发明人 |
GEORG *PANGALOS |
分类号 |
D21C9/00;D21C9/02;D21C9/10;D21C9/153;(IPC1-7):D21C/ |
主分类号 |
D21C9/00 |
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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