采用HP两段漂白CMP苇浆

Reed CMP Bleached with H-P Sequence

本实验重点研究了次氯酸盐结合过氧化氢二段漂中的药液用量以及其它因素对漂浆白度和物理性质的影响。采用HP两段漂,用8％次氯酸盐及2％H_2O_2下,可使CMP苇浆的白度从32％提高到78％(Elrepho);漂损8～10％,漂后浆除不透明度外,浆的其它物理性质都获得了显著的提高。此外,本文还介绍了用其它几种漂白方法处理CMP苇浆的实验研究。

The application of hypochiorite and peroxide was studied in this paper, emphasis was put on the effect of alkalinity, hypochlorite and peroxide charge on bleach outcome. Results indicated that reed CM pulp responded well to hypochiorite and peroxide in a two-stage sequence. Under optimum bleaching conditions, more than 40 points in brightness gain (from 32% to78%) could be achieved with 8% hypochiorite and 2% peroxide. The strength characteristics of the pulp were significantly improved after bleaching, but at the expense of a yield shrinkage of approximately 8% to 10% ; in other words, the overall pulp yield (on o. d. reed chips) was around 70%.