RELEASE OF URONIC ACID DURING ALKALINE PEROXIDE BLEACHING OF ASPEN CTMP

摘要：

Aspen CTMP were bleached with alkaline hydrogen peroxide and the effects of various factors, including sodium hydroxide and hydrogen peroxide dosage, bleaching temperature and time, and bleaching consistence on the release of uronic acids during bleaching process was evaluated. The contents of uronic acids in the process waters were determined by spectrophotometric method. The results showed that the release of uronic acids was mainly affected by the system alkalinity. The effect of H2O2 on the release of uronic acids is not obvious. More H2O2 will further oxidize uronic acids to low molecular carboxylic acid derivatives lowering uronic acids content in DCS. A majority of uronic acid could release into the pulp system at the initial stages of bleaching. High bleaching temperature could enhance the release of uronic acids.

关键词： aspen CTMP uronic acid alkaline peroxide bleaching

作者: Dan Huo Menghua Qin Yingjuan Fu Qinghua Xu Na Liu

作者单位: Key Laboratory of Paper Science and Technology of Ministry of Education,Shandong Polytechnic University,Jinan,Shandong,250353,China

会议类型: 国际会议

会议名称: International Mechanical Pulping Conference 2011(2011国际机械浆学术会议)

会议地点: 西安

会议语种:英文

页码: 291-294

在线出版日期: 2011-06-26（万方平台首次上网日期，不代表论文的发表时间）