发明名称 |
Dye stripping by oxygen in secondary fiber recovery |
摘要 |
Color is removed from secondary pulps with non-chlorine based bleaching agents in treating sequences using oxygen with combinations of peroxide, ozone, and/or hydrosulfite at/controlled pH conditions. Acid treatment prior to bleaching steps improves color removal and protects fibers from damage at more severe bleaching conditions.
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申请公布号 |
US5332471(A) |
申请公布日期 |
1994.07.26 |
申请号 |
US19930025688 |
申请日期 |
1993.03.03 |
申请人 |
AIR PRODUCTS AND CHEMICALS, INC. |
发明人 |
NADDEO, RONALD C.;HRISTOFAS, KONSTANTINOS;MAGNOTTA, VINCENT L. |
分类号 |
D21B1/32;D21C5/02;D21C9/10;D21C9/147;(IPC1-7):D21C5/02 |
主分类号 |
D21B1/32 |
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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