THE RESEARCH ON PARTIALLY SUBSTITUTING MgO FOR NaOH AS THE ALKALI SOURCE IN THE HIGH-CONSISTENCY RETENTION STAGE OF TRIPLOID POPLAR P-RC APMP
As an alkali source, sodium hydroxide (NaOH) is used in the conventional preconditioning followed by refiner chemical treatment alkaline peroxide mechanical pulping (P-RC APMP) process. In this study, NaOH was partially substituted by magnesium oxide (MgO) as the alkali source (substitution percentage of up to 50％) in the high-consistency retention stage of triploid poplar P-RC APMP process. The pH values of the bleaching liquor, yields and chemical components of the refined pulp were investigated to explore the potential advantages of MgO instead of NaOH as the alkali source. The results showed that partially substituting MgO for NaOH resulted in a lower pH of bleaching liquor and a higher bleached pulp yield than those of the NaOHbased process. In addition, the dissolution of benzene alcohol extractives, lignin, pentosans, and carbohydrates all decreased.
P-RC APMP MgO substitution carbohydrates pentosans lignin extractives
Qingxi Hou Zhi Liu Linyong Ye Wei Xu Jiangpeng Zhao
Tianjin Key Laboratory of Pulp & Paper, Tianjin University of Science & Technology, Tianjin 300457,China.
国际会议
16th International Symposium on Wood,Fiber and Pulping Chemistry(第十六届木材、纤维及制浆化学国际会议)
天津
英文
655-660
2011-06-08（万方平台首次上网日期，不代表论文的发表时间）