CAJ | 학술논문

由水预水解提取半纤维素后的桉木片和原木片分别通过烧碱-蒽醌法和硫酸盐法蒸煮获得4组浆料,分析了浆料中铜、锰、铁含量,比较了不同条件H_2O_2漂白后的浆料白度及H_2O_2消耗.研究结果表明,水顶水解提取半纤维素的木片,其碱法浆在H_2O_2漂白中的可漂性明显提高,相同漂白条件下浆料白度提高了4-7个白度单位,漂至相同白度时H_2O_2的消耗量明显降低.木片的水预水解使其碱法浆中的Cu、Mn含量明显降低.对浆料进行漂前预处理使4种浆料样品中的金属元素含量处于相近水平,但相同条件下H_2O_2漂白后白度有明显差别.
유수예수해제취반섬유소후적안목편화원목편분별통과소감-은곤법화류산염법증자획득4조장료,분석료장료중동、맹、철함량,비교료불동조건H_2O_2표백후적장료백도급H_2O_2소모.연구결과표명,수정수해제취반섬유소적목편,기감법장재H_2O_2표백중적가표성명현제고,상동표백조건하장료백도제고료4-7개백도단위,표지상동백도시H_2O_2적소모량명현강저.목편적수예수해사기감법장중적Cu、Mn함량명현강저.대장료진행표전예처리사4충장료양품중적금속원소함량처우상근수평,단상동조건하H_2O_2표백후백도유명현차별.
Using eucalyptus chips with and without water pre-hydrolysis for extracting hemicellulose sugars as raw material,four alkline pulp samples were produced by both sodium hydroxide-anthraquinone and kraft processeg.The contents of transition metals such as copper,manganese and iron Were analyzed.The pulp brightness and H_2O_2 consumption were compared under different peroxide bleaching conditions.The results showed that the pulp bleachability of the resultant pulp in peroxide bleaching is obviously improved when the wood chips are pre-hydrolyzed before cooking.Under the sanle bleaching conditions,4～7 units higher brighmess can be obtained.For the same target hrightness the H_2O_2 consumption is evidently decreased.The contents of copper and manganese in pulp go down obviously by pre-hydrolysis.The transition metal contents in the four pulp samples which are pretreated before bleaching are at quite close level.But obvious diffience in the end btightness is appeared after peroxide bleaching with the same conditions.