发明名称 |
A PROCESS FOR THE PRODUCTION OF PAPER |
摘要 |
A process for improved dewatering and retention in the production of paper, where an anionic retention agent based on starches, cellulose derivatives or guar gums having no cationic groups and an acidic solution of an aluminium compound are added to the stock containing lignocellulose-containing fibres and optionally fillers. The pH of the stock prior to the addition of the aluminium compound should be at least about 6 to obtain the desired cationic aluminium hydroxide complexes in the stock. The present process is cost effective and insensitive to the content of calcium in the white water.
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申请公布号 |
CA2108027(C) |
申请公布日期 |
1997.05.27 |
申请号 |
CA19922108027 |
申请日期 |
1992.06.12 |
申请人 |
EKA NOBEL AB |
发明人 |
CARRE, BRUNO;CARLSON, ULF |
分类号 |
D21H17/28;D21H17/63;D21H21/10;(IPC1-7):D21H17/74 |
主分类号 |
D21H17/28 |
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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