发明名称 |
Medium consistency ozone brightening of high consistency ozone bleached pulp |
摘要 |
A process for delignifying and bleaching a lignocellulosic material (2) without the use of elemental chlorine or chlorine-containing compounds by forming (4) a pulp, oxygen delignifying (40) the pulp and thereafter further delignifying the oxygen delignified pulp by lifting, displacing and tossing the pulp in a radial direction while advancing it in an axial direction in a plug fow-like manner with an effective amount of ozone (88) for a sufficient time to obtain a substantially delignified pulp having a GE brightness of at least about 35 %. The substantially delignified pulp may then be brightened to a final product by treating the pulp with a brightening stage peroxide compound, followed by subsequently treating the pulp at low to medium consistency with ozone. |
申请公布号 |
SE9600773(D0) |
申请公布日期 |
1996.02.28 |
申请号 |
SE19960000773 |
申请日期 |
1996.02.28 |
申请人 |
UNION CAMP PATENT HOLDING INC |
发明人 |
W SPENCER *EACHUS;F OMAR *ALI;GEORGE *PANGALOS;F BRUCE *GRIGGS;P THOMAS *GANDEK;A MICHAEL *PIKULIN;ALLEN *ROSEN |
分类号 |
D21C9/10;D21C9/147;D21C9/153;D21C9/16;(IPC1-7):D21C/ |
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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