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| Releasing of Uronic Acids in Alkaline Peroxide Bleaching of Aspen CTMP |
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| DOI：10.11980/j.issn.0254-508X.2011.06.002 |
| Key Words:aspen CTMP uronic acids alkaline peroxide bleaching |
| Fund Project:国家自然科学基金（30972327）；国家教育部新世纪人才支持计划（NCET-08-0882）项目。 |
| Author Name | Affiliation | | 霍 丹 | 山东轻工业学院制浆造纸科学与技术省部共建教育部重点实验室,山东济南,250353 | | 秦梦华 | 山东轻工业学院制浆造纸科学与技术省部共建教育部重点实验室,山东济南,250353 | | 傅英娟 | 山东轻工业学院制浆造纸科学与技术省部共建教育部重点实验室,山东济南,250353 | | 徐清华 | 山东轻工业学院制浆造纸科学与技术省部共建教育部重点实验室,山东济南,250353 | | 刘 娜 | 山东轻工业学院制浆造纸科学与技术省部共建教育部重点实验室,山东济南,250353 |
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| Abstract:Some dissolved and colloidal substances (DCS) tend to release during the alkline hydrogen peroxide bleaching of mechanical pulp, and the anionic groups (AGs) in DCS are mainly uronic acids. In this paper, the aspen CTMP were bleached with alkaline hydrogen peroxide under different conditions, and the content of uronic acids in the resultant DCS was determined by spectrophotometric method. The results showed that the amount of uronic acids dissolved was mainly affected by the alkalinity of the system; Peroxide could obstruct the release of the uronic acids under high alkalinity. High reaction temperature (e.g. above 80℃) could result in a significant increase of the content of uronic acids. The results of orthogonal experiments indicated that factors affecting the uronic acids relasase were the dosage of NaOH, temperature, dosage of H2O2, consistency of pulp and reaction time in order. |
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