论文部分内容阅读
在二氧化氯漂白过程中,构建一种或多种pH缓冲体系,使二氧化氯漂液充分发挥漂白作用,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pH缓冲体系配制的漂液漂白效果及其机理的分析,筛选出磷酸氢二钠-柠檬酸、柠檬酸-柠檬酸钠、磷酸-磷酸氢二钠等具有较大缓冲容量和较优漂白效果的酸碱缓冲体系,其中磷酸-磷酸氢二钠效果最佳,添加后麦草浆D0段脱木素率达到61.1%ISO,白度提高16.5%ISO,说明该pH缓冲体系为漂白过程各功能组分的有效发挥提供了良好的酸碱环境和载体。
In the process of chlorine dioxide bleaching, one or more pH buffering systems are constructed to make the chlorine dioxide bleaching solution fully exert the bleaching effect and achieve the purpose of reducing the amount of bleaching solution without affecting the bleaching effect. Through the analysis of the bleaching solution bleaching effect and its mechanism of different types of pH buffer system, we have screened out the large buffer capacity of disodium hydrogen phosphate - citric acid, citric acid - sodium citrate, phosphoric acid - Bleaching effect of acid-base buffer system, of which the optimal effect of phosphoric acid - sodium hydrogen phosphate, D0 after the addition of wheat pulp delignification rate reached 61.1% ISO, whiteness increased by 16.5% ISO, indicating that the pH buffer system bleaching process The effective performance of each functional component provides a good acid-base environment and carrier.