酸碱缓冲体系对麦草浆过氧化氢漂白的影响  

Effects of Acid-Base Buffer System on Wheat Straw Pulp Peroxide Bleaching

作　　者：王伦[1] 韩卿[1] 

机构地区：[1]陕西科技大学造纸工程学院,陕西西安710021

出　　处：《纸和造纸》2011年第2期28-31,共4页Paper and Paper Making

摘　　要：采用DEP短序工艺漂白麦草浆,在过氧化氢漂白段(P),添加酸碱缓冲体系,使H2O2充分发挥漂白作用,在不影响漂白效果的前提下,达到减少漂液用量的目的。通过对不同类型酸碱缓冲体系配制的漂液漂白效果及其机理的分析,筛选出了硼砂-氢氧化钠、碳酸钠-碳酸氢钠、磷酸氢二钠-氢氧化钠、硼酸-氯化钾-氢氧化钠等具有较大缓冲容量和较优漂白效果的酸碱缓冲体系,其中硼砂-氢氧化钠效果最佳,添加后麦草浆P段脱木素率达到37.8%,白度可以达到83.58%ISO。ECF short sequence of DEP bleaching was used to bleach wheat straw pulp, add acid-base buffer systems in peroxide bleaching in order to full play H2O2 bleaching effects and reduce its dosage. Through analyzing the bleaching effects and mechanism of different types of acid-base buffer systems, screened out borax-sodium hydroxide, sodium carbonate-sodium bicarbonate, disodium hydrogen phosphate-sodium hydroxide, boric acid-potassium chloride-sodium hydroxide acid-base buffer systems which have great buffering capacity and high bleaching effective. Among them, borax-sodium hydroxide acid-base buffer system bleaching effective is best, adding it into the peroxide bleaching liquor, the rate of delignification can reach to 37.8%, pulp brightness also increase to 83.58%ISO.

关 键 词：漂白 过氧化氢 酸碱缓冲体系 PH值控制 

分 类 号：TS745[轻工技术与工程—制浆造纸工程]