XYLANASE PREBLEACHING ON NaOH-AQ WHEAT STRAW PULP

编号 zgly0000332943

文献类型 期刊论文

文献题名 XYLANASE PREBLEACHING ON NaOH-AQ WHEAT STRAW PULP

学科分类 220.5570;林产化学加工学

作者 CaixiaLi  YongjunDeng  PingLi  GuiganFang  ShuchaiLiu 

作者单位 ResearchInstituteofChemicalProcessingandUtilizationofForestProducts 

母体文献 天津科技大学学报 

年卷期 2004,19(A02)

页码 268-272

年份 2004 

分类号 TS745 

关键词 木聚糖酶  预漂  小麦秸杆纸浆  次氯酸钙漂白 

文摘内容 Before calcium hypochlorite bleaching (H) and chlorination, alkaline extraction, calcium hypochlorite three-stage-bleaching (CEH),we used a kind of hemicellulase, xylanase, to treat wheat straw pulpfrom Gaoyou Papermill. Xylanase pretreatment contained tow stages, the first stage was xylanase treatment, which was followed by alkaline extraction, the second stage. The xylanase could act on partial lignin and carbohydrate, chiefly xylan. The following alkaline extraction could dissolve something that could not be removed during the first stage. The result of pretreatment was to facilitate penetration of bleaching chemicals, to reduce effective chlorine consumption and to lower pollution loading of bleaching effluent. In the case of these two bleaching processes, the enzymatic pretreatment substantially enhanced the optical properties of the pulps. To calcium hypochlorite bleaching, strength properties of pulps wereimproved。