阴离子定着剂在废新闻纸造纸中的应用

Research on the Application of Anionic Catchers in Waste News Pulp

研究了阴离子定着剂聚乙烯亚胺及其改性物在新闻纸浆中的应用 ,分析了其助留、助滤效果 ,并与硫酸铝、聚合氯化铝进行了比较。结果表明 ,聚乙烯亚胺及其改性物对阴离子的定着效果好于硫酸铝、聚合氯化铝。聚乙烯亚胺及其改性物能提高留着 ,加快滤水速度 ,但会导致纸张白度的下降 ;pH的变化对聚乙烯亚胺定着作用的影响较小 ,在中性条件下也能发挥好的定着效果。

More attention is paid to the application of anionic trash catchers in the waste news pulp,this paper compares with alum and polyaluminum chloride(PAC),and analyzes the effects for polyethyleneimine and modified polyethyleneimine on the retention,drainage.The effects indicate that polyethyleneimine and modified polyethyleneimine are better than alum and polyaluminum chloride(PAC)on the retention of the anionic trash.Polyethyleneimine and modified polyethyleneimine can improve the retention of anionic trash and the dewatering speed of the stock,but decrease the paper brightness and strength;The pH changing has little effect on the retention property of polyethyleneimine.Under the neutral condition,polyethyleneimine also has a good retention effect compared with the other synthetic,water soluable organic polymers,natural and inorganic retention aids,polyethylenimine and their derivations have not only higher charge density and lower molar mass,but also lower viscosities.They are easy to handle and readily miscible with water.They can intensively absorb anionic trash,decrease other chemicals addition and white water concentration.It is very important for the clean production of paper industry.