用于化机浆过氧化氢漂白的几种新型稳定剂的性能比较  

Performance Comparison of Several New Stabilizers for Hydrogen Peroxide Bleaching of Chemi-mechanical Pulp

作　　者：程明 滕步彬 季文虎 程芸 张红杰 张雪 侯磊磊 陈铃华 陈雪梅 CHENG Ming;TENG Bubin;JI Wenhu;CHENG Yun;ZHANG Hongjie;ZHANG Xue;HOU Leilei;CHEN Linghua;CHEN Xuemei(Zhejiang Zhongxin Environmental Protection Technology Co.,Ltd.,Jinhua,Zhejiang Province,321100;China National Pulp and Paper Research Institute Co.,Ltd.,Beijing,100102;National Engineering Lab for Pulp and Paper,Beijing,100102)

机构地区：[1]浙江众鑫环保科技集团股份有限公司,浙江金华321100 [2]中国制浆造纸研究院有限公司,北京100102 [3]制浆造纸国家工程实验室,北京100102

出　　处：《中国造纸》2024年第7期172-179,共8页China Pulp & Paper

基　　金：国家自然科学基金项目(32171727);中轻集团科技创新基金项目(ZQ2023JC-GC01);中轻集团科技创新重点专项(ZQ2022JC-QN01)。

摘　　要：本研究探讨了3种稳定剂(LS-8838、SB-005和KML)替代传统Na2 SiO_(3)用于化机浆过氧化氢漂白的可行性及优缺点,优化了漂白稳定剂的使用条件,比较了3种漂白稳定剂与Na2 SiO_(3)在过氧化氢漂白过程中的结垢现象。结果表明,针对未漂杨木化学机械浆进行过氧化氢漂白,当NaOH用量3%、H_(2) O_(2)用量5%、漂白时间60 min时,漂白稳定剂(LS-8838、SB-005、KML)的最佳使用条件均为添加量0.3%、浆浓25%,漂白温度80℃。3种漂白稳定剂添加量为0.3%的漂白效果均能达到Na2 SiO_(3)添加量为1.5%的漂白效果,纸浆白度分别为75.4%、76.4%、74.4%;与Na2 SiO_(3)漂白相比,残余H_(2) O_(2)含量分别提高了62.5%、135.4%和87.5%;纸张抗张指数分别提高了14.3%、18.6%、0.6%。其中SB-005处理过的纸浆白度、纸张抗张强度最佳,但其硅含量较高,结垢现象比较严重;无磷低硅LS-8838与含磷无硅KML的漂白效果(残余H_(2) O_(2)含量、白度、强度)也优于Na2 SiO_(3)的漂白效果,其中LS-8838漂白效果最佳且无结垢现象,可作为Na2 SiO_(3)的替代品。In this study,the feasibility,advantages and disadvantages of three stabilizers(LS-8838,SB-005 and KML)replacing tradition‐al sodium silicate for hydrogen peroxide bleaching of chemical pulp were discussed.The using conditions of bleaching stabilizers were opti‐mized.The scaling phenomena between these three types bleaching stabilizers and Na2SiO_(3) in hydrogen peroxide bleaching process were compared.The results showed that when the dosage of NaOH was 3%,the dosage of H_(2)O_(2) was 5%,and the bleaching time was 60 min,the optimal dosage of bleaching stabilizer(LS-8838,SB-005,KML)was 0.3%,pulp concentration was 25%,and bleaching temperature was 80℃.The bleaching effect with dosage of Na2SiO_(3) of 1.5%could be achieved by adding three bleaching stabilizers with dosage of 0.3%,and the brightness was 75.4%,76.4%and 74.4%,respectively.The amount of residual H_(2)O_(2) was 62.5%,135.4%and 87.5%,and the tensile strength of the paper made from it was increased by 14.3%,18.6%and 0.6%,respectively.Among them,the slurry treated by SB005 had the best brightness and strength,but its silicon content was higher and the scaling phenomenon was more serious.The bleaching ef‐fect(amount of residual H_(2)O_(2),whiteness,and intensity)of LS-8838 and phosphorus-containing silica-free KML was also better than that of Na2SiO_(3),among which LS-8838 had the best bleaching effect and no scaling phenomenon,and could be used as a substitute for sodium silicate.

关 键 词：化学机械浆 过氧化氢 漂白稳定剂 结垢现象 

分 类 号：TS727.1[轻工技术与工程—制浆造纸工程]