发明名称 |
Use of ethyleneamine for washing pulp containing lignin |
摘要 |
Ethyleneamines are used in washing pulp to remove lignin. A process for washing a cellulose pulp mixture containing lignin to remove at least a portion of the lignin therefrom comprises use of a washing composition with at least about 100 ppm of an ethyleneamine. The process includes an improvement in a washing process a cellulose pulp mixture containing lignin wherein a washing composition is used to remove at least a portion of the lignin, the improvement comprising use of at least about 100 ppm of an ethyleneamine with the washing composition and/or using an amount of ethyleneamine at least equivalent to about 100 ppm based on the washing composition with the washing composition. The washing composition is also novel and includes a washing composition for washing kraft pulp comprising water and at least about 100 ppm of an ethyleneamine.
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申请公布号 |
US5641385(A) |
申请公布日期 |
1997.06.24 |
申请号 |
US19950373354 |
申请日期 |
1995.01.17 |
申请人 |
THE DOW CHEMICAL COMPANY |
发明人 |
CROFT, ALAN P.;SHEFFIELD, BYFORD D. |
分类号 |
D21C9/02;(IPC1-7):D21C9/02 |
主分类号 |
D21C9/02 |
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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