Lipophilic extractives from Eucalyptus globulus pulp during kraft cooking followed by TCF and ECF bleaching

被引:45
作者
Gutiérrez, A
Romero, J
del Río, JC
机构
[1] CSIC, Inst Recursos Nat & Agrobiol, E-41080 Seville, Spain
[2] ENCE, Ctr Invest & Tecnol, E-36157 Pontevedra, Spain
关键词
extractives; pitch; Eucalyptus globulus; pulp; kraft cooking; bleaching;
D O I
10.1515/HF.2001.043
中图分类号
S7 [林业];
学科分类号
0829 ; 0907 ;
摘要
The chemical composition of lipophilic extractives in paper pulps from Eucalyptus globulus wood during kraft cooking followed by TCF ("totally chlorine free") and ECF ("elemental chlorine free") bleaching sequences has been determined by gas chromatography and gas chromatography-moss spectrometry. The chemical analyses revealed that the composition of the lipophilic extractives in pulp after kraft cooking and TCF bleaching with hydrogen peroxide was similar to that of E. globulus wood extractives, sitosterol and sitosterol esters being the predominant compounds. In contrast, the presence of these compounds was almost negligible in pulp after ECF bleaching with chlorine dioxide and only the saturated sterol stigmastanol, in both free and esterified forms, survived the bleaching.
引用
收藏
页码:260 / 264
页数:5
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