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采用次氯酸钙对亚硫酸盐蔗渣浆进行漂白实验,主要有次氯酸盐常规漂和高温漂,添加酰胺类助剂漂白,添加生物酶预处理的漂白及增加过氧化氢的漂白。结果表明,有效氯用量是白度增幅的最重要因素,在10%用量以内更加明显;高温次氯酸盐漂白在此与常规漂相当,用氯量在3%～6%范围内每增加1%用量白度增加4%;添加漂白助剂后反使白度增幅降低;生物酶预处理可以明显提高浆白度,无论是否添加漂白助剂,漂后成浆白度相当;增加过氧化氢漂白后,与过氧化氢用量(1%～6%)相比,次氯酸盐用量(3.5%～10%)对白度贡献大得多;过氧化氢漂后成浆的返黄值随用氯量增大稍增大,但都很低。
The bleaching experiments of the sulfite bagasse pulp with calcium hypochlorite mainly include hypochlorite conventional bleaching and high temperature bleaching, adding amide adjuvant bleaching, adding bleaching of biological enzyme pretreatment and increasing the bleaching of hydrogen peroxide. The results showed that the effective amount of chlorine is the most important factor for the increase of whiteness, which is more obvious when the amount of whiteness is 10%. High temperature hypochlorite bleaching is equivalent to that of conventional bleach, and every increase of 1% % Whiteness increased by 4%; addition of bleach additives to reverse the increase in whiteness decreased; pretreatment of biological enzymes can significantly improve the whiteness of the pulp, whether or not adding bleach additives, Bleached pulp whiteness quite; increased hydrogen peroxide After bleaching, the amount of hypochlorite (3.5% ~ 10%) contributed much more to the whiteness than the amount of hydrogen peroxide (1% ~ 6%); Chlorine increased slightly increased, but are very low.