A. Gutiérrez, J. Romero, J.C. del Río
Lipophilic Extractives from Eucalyptus globulus Pulp during Kraft Cooking Followed by TCF and ECF Bleaching
Summary
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-mass 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.
Holzforschung, Walter de Gruyter
Print ISSN: 0018-3830
Volume: 55, 04/2001
Pages: 260 - 264
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