【摘要】 进行ＡＳ—ＡＱ麦草浆甲醇强化的氧气漂白研究，结果表明：漂前的硫酸预处理是提高氧漂浆质量的重要措施；在实验条件下，甲醇用量和氧气初压是决定漂浆白度的最主要因素；温度对漂浆得率的影响较大；温度太高，将对漂浆白度不利；漂白时间对漂浆白度、得率的作用较小。在选定的６％甲醇、９０℃、８０分钟、０．７ＭＰａ氧气初压的条件下，氧漂浆白度为７３．４％ＳＢＤ；再经１．５％Ｈ２Ｏ２漂白，浆白度达８２％ＳＢＤ，裂断长为６．１千米，ＯＰ漂白的总得率损失低于１０％。ＡＳ—ＡＱ麦草浆的甲醇强化氧漂，具有得率高、强度好、白度高、可漂性好等优点，为我国草浆全无氯短序高白度漂白提供了新的途径。更多还原

【Abstract】 The methanol-reinforced oxygen bleaching of wheat straw AS-AQ pulps has been studied. The results indicate that pretreatment is an important measure to improve the qualities of bleached pulps. Under the trial conditions , methanol charge and initial oxygen pressure are the major factors effecting on pulp whiteness. Bleaching temperature has a strong influence on pulp yield. But an unsuitably high temperature would cause a drop in pulp whiteness. Reaction time plays a minor role on the whiteness and yield of bleached pulps. With the suggested experimental conditions, 10% pulp consistency, 3% alkali charge, 1% Magnesium sulfate input, 6% methanol charge, 90℃ bleaching temperature, 80 minute reaction time, and 0. 7MPa initial oxygen pressure, the whiteness of oxygen bleached pulps increase upto 73. 4% SBD. Having been bleached with 1. 5% H2O2 in alkaline medium, pulps whiten to a whiteness of 82% SBD, and pulp sheets maintain a higher strength properties, the breaking length of 6. 1 km. The total yield loss during OP bleaching is slightly less ten percent. It is obviously that methanol - reinforced oxygen bleaching of AS-AQ pulps prepared from wheat straw has many remarkable advantages, e. g. higher yield, good strength, higher whiteness, better bleachability, and so on. This bleaching process shows us a new way to bleach straw chemical pulps to high whiteness with TCF agents in a short procedure.更多还原