Sulfite-Formaldehyde Pulping and Oxygen Delignification of Wheat Straw

WenJuan Wu; Yu Zhang; Bo Jiang; YongCan Jin

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Sulfite-Formaldehyde Pulping and Oxygen Delignification of Wheat Straw

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In this study,wheat straw pulp was prepared by sulfiteformaldehyde(SF) pulping combined with oxygen delignification to develop a sustainable methodology for chemical pulping of straw materials.The bleachability of oxygen-delignified SF pulp was also evaluated by hypochlorite bleaching.The results indicated that the Na_2SO_3 charge played an important role in lignin removal during SF pulping as well as oxygen delignification.The efficiency of oxygen delignification of wheat straw SF pulp was markedly high.After the oxygenation stage,the Kappa number decreased by over 50%(the original Kappa number of SF pulp was lower than 30) when the Na OH charge was in the range of 3%~5%.The optimal conditions for preparing bleached pulp via combined SF pulping and oxygen delignification involved the use of 12% of Na_2SO_3 and 3% of Na OH,respectively.Pulp with relatively high brightness,a low Kappa number,as well as an acceptable viscosity could be obtained when oxygen-delignified SF pulp was bleached with hypochlorite under a low active chlorine dosage.

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《造纸与生物质材料：英文版》 |2017年第003期|P.12-17|共6页
作者
WenJuan Wu; Yu Zhang; Bo Jiang; YongCan Jin;
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[1]Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources,Nanjing Forestry University, Nanjing, Jiangsu Province, 210037, China [2]State Key Laboratory of Pulp and Paper Engineering, South China University of Technology,Guangzhou, Guangdong Province, 510640, China;

[1]Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources,Nanjing Forestry University, Nanjing, Jiangsu Province, 210037, China [2]State Key Laboratory of Pulp and Paper Engineering, South China University of Technology,Guangzhou, Guangdong Province, 510640, China;

[1]Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources,Nanjing Forestry University, Nanjing, Jiangsu Province, 210037, China [2]State Key Laboratory of Pulp and Paper Engineering, South China University of Technology,Guangzhou, Guangdong Province, 510640, China;

[1]Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources,Nanjing Forestry University, Nanjing, Jiangsu Province, 210037, China [2]State Key Laboratory of Pulp and Paper Engineering, South China University of Technology,Guangzhou, Guangdong Province, 510640, China;

[1]Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources,Nanjing Forestry University, Nanjing, Jiangsu Province, 210037, China [2]State Key Laboratory of Pulp and Paper Engineering, South China University of Technology,Guangzhou, Guangdong Province, 510640, China;

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中图分类轻工业、手工业;
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Sulfite-Formaldehyde Pulping and Oxygen Delignification of Wheat Straw

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