XYLANASE PREBLEACHING ON NaOH-AQ WHEAT STRAW PULP  

作　　者：CaixiaLi YongjunDeng PingLi GuiganFang ShuchaiLiu 

机构地区：[1]ResearchInstituteofChemicalProcessingandUtilizationofForestProducts,CAF,Nanjing,21004 [2]NorthwestInstituteofLightIndustry,LightChemicalIndustryDepartment,Xianyang,712081

出　　处：《天津科技大学学报》2004年第A02期268-272,共5页Journal of Tianjin University of Science & Technology

摘　　要：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 pulp from 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 were improved.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 pulp from 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 were improved.

关 键 词：木聚糖酶 预漂 小麦秸杆纸浆 次氯酸钙漂白 

分 类 号：TS745[轻工技术与工程—制浆造纸工程]