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首页> 外文会议>Research Forum on Recycling; 20040927-29; Quebec City(CA) >IN-SITU GENERATION OF PEROXIDE IN THE BLEACHING OF DEINKED PULP
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IN-SITU GENERATION OF PEROXIDE IN THE BLEACHING OF DEINKED PULP

机译：脱浆纸浆漂白中过氧化物的原位生成

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摘要

Peroxide bleaching has proven to be very successful in bleaching of deinked mixed office waste pulp. The possibility of sodium perborate and sodium percarbonate as the oxidizing agents in the bleaching of industrially deinked pulp with a high mechanical pulp contents was investigated. Both chemicals generate hydrogen peroxide in aqueous solution. In the bleaching with peroxide, sodium hydroxide must be used in order to produce perhydroxyl anions. The advantage of using peroxide generators is that sodium hydroxide is not required, for sodium perborate the alkalinity is provided by borate and for sodium percarbonate, the alkalinity is provided by sodium carbonate. The results are compared with those of the initial deinked pulp and with pulp bleached using hydrogen peroxide. The efficiency of the bleaching was evaluated in terms of optical properties (ISO brightness, opacity, color coordinate, residual ink contents) and physical properties (breaking length, burst, tear). Results of the dissolution of organic material during bleaching or the amount of stickies in the final pulp and total organic contents of the bleaching effluent are presented.
机译：已证明过氧化物漂白在脱墨混合办公室废纸浆的漂白中非常成功。研究了过硼酸钠和过碳酸钠作为氧化剂在高机械纸浆含量的工业脱墨纸浆漂白中的可能性。两种化学品在水溶液中都会产生过氧化氢。用过氧化物漂白时，必须使用氢氧化钠以产生过羟基阴离子。使用过氧化物发生器的优点是不需要氢氧化钠，对于过硼酸钠而言，碱度由硼酸盐提供，对于过碳酸钠而言，碱度由碳酸钠提供。将结果与初始脱墨纸浆和使用过氧化氢漂白的纸浆进行比较。根据光学性能（ISO亮度，不透明度，色坐标，残余墨水含量）和物理性能（断裂长度，破裂，撕裂）评估了漂白效率。给出了漂白过程中有机材料溶解的结果或最终纸浆中的胶粘物含量以及漂白废水中总有机物含量的结果。

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