发明名称 |
Cleaning and bleaching of secondary fiber |
摘要 |
<p>Secondary pulp is deinked and bleached by contacting the pulp simultaneously with oxygen, alkali, and a surfactant in a reaction zone followed by washing to recover a secondary fiber product. Simultaneous contacting with oxygen and surfactant yields higher pulp brightness than sequential contacting in oxygen bleaching and washing stages, and enhances bleachability in further bleaching stages.</p> |
申请公布号 |
EP0542147(B1) |
申请公布日期 |
1997.01.29 |
申请号 |
EP19920119032 |
申请日期 |
1992.11.06 |
申请人 |
AIR PRODUCTS AND CHEMICALS, INC. |
发明人 |
NADDEO, RONALD CHARLES |
分类号 |
D21C5/02;D21C9/10;D21C9/147;(IPC1-7):D21C5/02 |
主分类号 |
D21C5/02 |
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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