Soda-oxygen Pulping of Bagasse at Low Temperature
Soda-oxygen pulping of bagasse under a lower temperature was studied in this paper.Some effects,including the cooking curves,and soda dosages,on the pulping process were investigated.As a result,the soda-oxygen pulping of bagasse at 100℃ was successful.The optimized conditions were: active alkali charge of 23％,maximum cooking temperature of 100℃,time to maximum temperature of 55 min,time at the maximum temperature of 180 min,initial pressure of oxygen of 0.6 MPa,MgSO4 charge of 0.5％,additive AOA-1 of 0.5％,and depithed bagasse consistency of 12％.Some properties of soda-oxygen bagasse pulp produced at the optimal low-temperature cooking conditions were: screened yield of 60.9％,Kappa number of 14,viscosity of 766 dm3/kg,and brightness of 63.7％.Compared with pulping at higher temperatures(125-110℃),this pulp had higher screened yield,higher brightness,and acceptable viscosity,while the delignification degree was moderate.The experimental results indicated that this puling process is well suited for pulping bagasse.The temperature of 100℃ was also the lowest cooking temperature reported for Sodaoxygen pulping of bagasse till now.Pulping at a lower temperature than the conventional methods means that it can more easily be commercialized,because of its much mild operation conditions and the better pulp qualities.
bagasse brightness kappa number low temperature soda-oxygen pulping yield
FENGXIA YUE KELI CHEN
The Research Center of Pulp & Paper Engineering,Kunming University of Science and Technology,Kunming,650101,China
国际会议
第二届国际造纸与环境学术会议(The Second International Papermaking & Environment Conference)
天津
英文
369-372
2008-05-14（万方平台首次上网日期，不代表论文的发表时间）