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Items for "TCF bleaching"

Effect of UV radiation on the carbonyl distribution in different pulps

The effect of UV irradiation on unbleached and TCF-bleached dissolving pulp samples of different provenience, a beech sulphite and an eucalyptus prehydrolysis kraft pulp, has been analyzed according to the CCOA method, evaluating the changes in the molecular weight distribution, the total number of carbonyl groups and the carbonyl group profiles of each pulp...

Keywords: carbonyl groups, CCOA method, residual lignin, TCF bleaching, UV irradiation

10/2004 | Holzforschung, Walter de Gruyter
Surface lignin and extractives on hardwood RDH kraft pulp chemically characterized by ToF-SIMS

The chemical characteristics of lignin and extractives on the outermost surface of hardwood rapid displacement heating (RDH) kraft pulp were studied using time-of-flight secondary ion mass spectrometry (ToF-SIMS)...

Keywords: birch, chemical structure, Composition, extractives, hardwood, kraft pulp, lignin, rapid displacement heating (RDH), secondary ion mass spectrometry, Surface, surface analysis, TCF bleaching, time-of-flight secondary ion mass spectrometry (ToF-SIMS)

09/2005 | Holzforschung, Walter de Gruyter
Structural modification of eucalypt pulp lignin in a totally chlorine-free bleaching sequence including a laccase-mediator stage

Structural modification of eucalypt pulp lignin was investigated in a totally chlorine-free (TCF) bleaching sequence including a laccase-mediator stage...

Keywords: 2D NMR, enzymes, Eucalyptus globulus, FTIR, HMBC, HSQC, laccase-mediator system, paper pulp, Py-GC/MS, TCF bleaching

11/2007 | Holzforschung, Walter de Gruyter