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Title

Lipophilic extractives from several nonwoody lignocellulosic crops (flax, hemp, sisal, abaca) and their fate during alkaline pulping and TCF/ECF bleaching

AuthorsMarques, Gisela CSIC ORCID; Río Andrade, José Carlos del CSIC ORCID ; Gutiérrez Suárez, Ana CSIC ORCID
KeywordsPitch
Lipophilic extractives
Paper pulp
Nonwoody fibers
Issue Date2010
PublisherElsevier
CitationBioresource Technology 101:260–267 (2010)
AbstractThe fate of lipophilic extractives from several nonwoody species (flax, hemp, sisal and abaca) used for the manufacturing of cellulose pulps, was studied during soda/anthraquinone (AQ) pulping and totally chorine free (TCF) and elemental chlorine free (ECF) bleaching. With this purpose, the lipophilic extracts from the raw materials and their unbleached and bleached industrial pulps, were analyzed by gas chromatography– mass spectrometry. Aldehydes, hydroxyfatty acids and esterified compounds such as ester waxes, sterol esters and alkylferulates strongly decreased after soda/AQ pulping while alkanes, alcohols, free sterols and sterol glycosides survived the cooking process. Among the lipophilic extractives that remained in the unbleached pulps, some amounts of free sterols were still present in the TCF pulps whereas they were practically absent in the ECF pulps. Sterol glycosides were also removed after both TCF and ECF bleaching. By contrast, saturated fatty acids, fatty alcohols and alkanes were still present in both bleached pulps.
Publisher version (URL)http://dx.doi.org/10.1016/j.biortech.2009.08.036
URIhttp://hdl.handle.net/10261/34500
DOI10.1016/j.biortech.2009.08.036
ISSN0960-8524
Appears in Collections:(IRNAS) Artículos
(CIB) Artículos

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