摘要
禾草类纸浆的漂白因生产清洁化的要求而面临着漂白技术升级的选择。通过对碱法蔗渣浆先行氧脱木素(O)加次氯酸盐(H)、二氧化氯(D)或臭氧(Z)的漂白研究表明:蔗渣浆较为合理的氧脱木素程度可控制在40%左右,而黏度损失能控制在100m l/g以内。因氧脱木素的采用,蔗渣浆漂白的有效氯用量可降低60%以上。其后的漂白仅一段就可以把蔗渣浆白度提至80%ISO。它们的漂白废液污染物指标依OZ、OD和OH的顺序显著增加。由于OZ组合所获漂白浆的物理强度也是最好,它应该是蔗渣浆真正意义上的清洁漂白方法。
Nowadays, bleaching methods have to be advanced for clean production of bleached pulp, but oxygen delignification widely used for clean bleaching of wood pulp is hardly applied for bleaching of straw pulps. Here, hleaching of bagasse Soda pulp was carried out with oxygen delignification prior to hypochlorite （H）, chlorine dioxide （D） or ozone （Z） bleaching. About 40% of the residual lignin may be removed from bagasse pulp by oxygen delignification, where the lost of pulp viscosity maintained within 100 ml/g. The following bleaching in only one stage was easy to elevate the pulp brightness to 80%1SO or so. Oxygen delignification resulted in the reduction of more than 60% available chlorine in comparison with the individual H bleaching. Because of the outstanding increase of the pollutant in bleaching effluents in turns of OZ, OD, particularly OH, and furthermore, OZ bleaching gave the pulp the best physical strength properties, OZ should be the truly clean beaching pathway to bagasse pulp.
出处
《中华纸业》
CAS
2015年第12期17-21,共5页
China Pulp & Paper Industry
基金
国家自然科学基金项目(21276119)
关键词
蔗渣浆
氧脱木素
次氯酸盐漂白
二氧化氯漂白
臭氧漂白
bagasse pulp
oxygen delignification
hypochloritebleaching
chlorine dioxide bleaching
ozone bleaching
