MAGNESIUM-BASED ALKALIS FOR H2O2 BLEACHING OF MASSON PINE CTMP
Magnesium-based alkalis for hydrogen peroxide bleaching of CTMP from Masson pine was investigated in this paper. The results showed that the optimum conditions for magnesium-based peroxide bleaching of Masson pine CTMP are as follows: hydrogen peroxide charge 4％, Mg(OH)2 charge 1.2％, Na2SiO3 charge 1.5 ﹪, bleaching temperature 80℃ and bleaching time 120min. Under the optimum conditions, the brightness of bleached pulp could reach 63.5％(ISO), while the brightness of bleached pulp by using the NaOH as the alkali source could only reach 61.4％(ISO). Compared to sodium-based peroxide bleaching, the chemical oxygen demand (CODcr) of effluent from bleaching process could decrease by 38.12％ in magnesium-based peroxide bleaching.
masson pine CTMP peroxide bleaching brightness physical strength
Yu Cong Hu Kexin Zhang Haichao Liu Yanxin
College of Chemical and Biological Engineering,Changsha University of Science and Technology Hunan, 410114, China
国际会议
广州
英文
506-509
2010-11-08（万方平台首次上网日期，不代表论文的发表时间）