发明名称 |
PROCESSES OF REDUCING CONTAMINATION FROM CELLULOSIC SUSPENSIONS |
摘要 |
<p>A method of removing synthetic hydrophobic resinous particles from a waste treatment process in which an aqueous cellulosic suspension is formed from waste cellulosic material in a pulping stage, passing the cellulosic suspension to a separation stage in which particles of ink and/or synthetic hydrophobic resinuous materials are separated from the cellulosic suspension, and optionally subjecting the cellulosic suspension to a washing stage and/or thickening stage to provide a treated pulp, in which process water from the separation stage and/or washing and/or thickening stages is clarified in a clarification stage in which suspended solids, comprising synthetic hydrophobic resinous particles are removed, and the clarified water is fed to the pulping stage in a clarification loop and/or combined with the treated pulp, wherein a water soluble cationic polymer is added to the process water at or prior to the clarification stage, characterised in that the water soluble cationic polymer formed from a monomer blend comprising, a first water soluble cationic monoment selected from the group consisting of diallyl dialkyl ammonium halide, dialkylaminoalkyl (meth)acrylamide and dialkylaminoalkyl (meth)acrylate, including quaternary ammonium salts and acid addition salts thereof, and a second water soluble cationic monomer comprising a hydrophobic moiety.</p> |
申请公布号 |
WO0210508(A1) |
申请公布日期 |
2002.02.07 |
申请号 |
WO2001EP08115 |
申请日期 |
2001.07.13 |
申请人 |
CIBA SPECIALTY CHEMICALS WATER TREATMENTS LIMITED;WEIR, JOSEPHINE, MICHELLE;LAYCOCK, MARK, ANTHONY |
发明人 |
WEIR, JOSEPHINE, MICHELLE;LAYCOCK, MARK, ANTHONY |
分类号 |
B01D21/01;C02F1/24;C02F1/56;C02F1/72;C08F220/34;C08F220/60;C08F226/02;C08F226/04;D21C5/02;D21C9/08;(IPC1-7):D21C9/08 |
主分类号 |
B01D21/01 |
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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