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dc.contributor.authorRío Andrade, José Carlos del-
dc.contributor.authorRomero, Javier-
dc.contributor.authorGutiérrez Suárez, Ana-
dc.date.accessioned2011-04-11T11:10:00Z-
dc.date.available2011-04-11T11:10:00Z-
dc.date.issued2000-
dc.identifier.citationJournal of Chromatography A 874: 235-245 (2000)es_ES
dc.identifier.issn0021-9673-
dc.identifier.urihttp://hdl.handle.net/10261/34485-
dc.description11 páginas, 4 tablas, 5 figuras. E-mail address: delrio@irnase.csic.es (J.C. del Río)es_ES
dc.description.abstractTwo organic deposits accumulated in a Kraft pulp mill during pulping of Eucalyptus globulus wood and throughout a TCF (totally chlorine free) bleaching sequence were characterized. One deposit was collected after cooking and an oxygen delignification stage while the other was collected after bleaching with hydrogen peroxide. The deposits were Soxhlet extracted with acetone, and the extracts redissolved in chloroform and subsequently analyzed by gas chromatography (GC) and GC–mass spectrometry (MS) using short and medium length high temperature capillary columns, respectively. On the other hand, the insoluble residues left after the acetone extraction were analyzed by Curie-point flash pyrolysis–GC–MS and by pyrolysis–methylation–GC–MS. The compounds identified in the deposits arise from the E. globulus wood lipophilic extractives that survive the pulping and bleaching processes. Triglycerides were completely hydrolyzed during the Kraft cooking and the fatty acids dissolved. Steroids (alcohols, hydrocarbons, ketones and esters) and waxes were the main components in the deposit collected after the oxygen delignification stage. After the bleaching with hydrogen peroxide, content of the waxes were reduced and fatty acids appeared. High amounts of fatty acids salts were also identified in the deposit collected after the oxygen stage, and in minor amounts in the deposit collected after hydrogen peroxide bleaching. In contrast, this deposit was mainly made up of high amounts of lignin-derived phenolic moieties.es_ES
dc.language.isoenges_ES
dc.publisherElsevieres_ES
dc.rightsopenAccesses_ES
dc.subjectEucalyptus globuluses_ES
dc.subjectWoodes_ES
dc.subjectPyrolysises_ES
dc.subjectKraft pulpes_ES
dc.subjectPitches_ES
dc.subjectDerivatizationes_ES
dc.subjectPyrolysises_ES
dc.subjectSterolses_ES
dc.subjectSterol esterses_ES
dc.subjectTetramethylammonium hydroxidees_ES
dc.titleAnalysis of pitch deposits produced in Kraft pulp mills using a totally chlorine free bleaching sequence.es_ES
dc.typeartículoes_ES
dc.identifier.doi10.1016/S0021-9673(00)00111-4-
dc.description.peerreviewedPeer reviewedes_ES
dc.relation.publisherversionhttp://dx.doi.org/10.1016/S0021-9673(00)00111-4es_ES
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