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Enzymes in combination with polyelectrolytes for enhancing the freeness of clarified sludge or recycle old newsprint in papermaking
Enzymes in combination with polyelectrolytes for enhancing the freeness of clarified sludge or recycle old newsprint in papermaking
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机译:与聚电解质结合的酶,可增强造纸中澄清污泥的游离度或回收旧新闻纸
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摘要
A process for improving the freeness of paper pulp, which comprises the steps of adding to the pulp at least 0.05%, based on the dry weight of the pulp, of a cellulolytic enzyme, allowing the pulp to contact the cellulolytic enzyme for from about 40 minutes to about 60 minutes at a temperature of at least 40°C, adding at least 0.01 %, based on the dry weight of the pulp, of a water soluble cationic polymer, adding at least 0.007%, based on the dry weight of the pulp, of a water soluble anionic polymer and forming the thus treated pulp into paper.
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