摘要
对用黑液预煮的两段改良蔗渣KP浆的氧气和H2O2漂白进行了研究。结果表明,使用OP两段漂白,在H2O2用量低于1.2%的条件下白度很难达到80%SBD。而采用OOP三段漂白,在H2O2用量1.0%的条件下,白度可达80.1%SBD,浆的粘度较高(达752mL/g)。在两段氧气漂白中,NaOH用量3%和H2O2用量1.0%时,提高H2O2漂白温度至86℃,可得到80.9%SBD的漂白浆,浆的粘度达782mL/g。研究认为,两段改良KP浆较常规KP浆具有更好的漂白性能,漂白浆的粘度也较高。
The study on oxygen and hydrogen peroxide bleaching of bagasse black liquor pretreated kraft pulp was carried out.Results showed that using OP two-stage bleaching(H 2 O 2 charge under1.2%)was difficult to reach80%SBD brightness of the pulp.However,using OOP three-stage bleaching(at H 2 O 2 charge1.0%),it was capable to achieve80.1%SBD brightness and the viscosity of the pulp somewhat increased(up to752mL/g).When NaOH charge reduced properly to3%in two -stage oxygen bleaching and temperature of H 2 O 2 bleaching increased to86℃,the bleached pulp with80.9%SBD brightness and higher viscosity(up to782mL/g)could be obtained.Results also showed that comparing black liquor pretreated KP cooking with conventional KP cooking,the pulp from the former has better bleachability and higher viscosity.
出处
《中国造纸》
CAS
北大核心
2003年第4期19-21,共3页
China Pulp & Paper
基金
广西科技厅自然科学资金资助项目。