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Characteristics of lignin obtained from steam-exploded softwood with soda/anthraquinone pulping

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Abstract

Lignins were obtained from a mixture of softwood sawdust using a hydrolytic pretreatment and a subsequent soda-anthraquinone delignification/pulping stage. Their potential uses and the effect of the pretreatment conditions on the yield (% of recovered lignin from black liquors) and chemical composition of isolated lignins were evaluated. The severity factor used combined the temperature and time of the hydrolytic process in a single ordinate (Ro). The severity range was modified from log Ro = 2.6 to log Ro = 4.6 and the pulping conditions were constant throughout the experiments. The effect of the cooking time on the chemical composition of precipitated lignins was also studied between 135–170 min for original (non-pretreated) material. Yield, elemental analysis, molecular weight distribution, Fourier transform infrared spectra (FTIR), structure, and the methoxyl and aliphatic/aromatic alcohol content of the various lignins, were compared.

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Authors and Affiliations

  1. Departament d’Enginyeria Química, Escola Tècnica Superior d’Enginyeria, Universitat Rovira i Virgili, Avda. Països Catalans, 26, 43007, Tarragona, Spain

    M. Neus Anglès, Jordi Reguant, Ricard Garcia-Valls & Joan Salvadó

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  1. M. Neus Anglès
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  2. Jordi Reguant
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  3. Ricard Garcia-Valls
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  4. Joan Salvadó
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Correspondence to Joan Salvadó.

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Anglès, M.N., Reguant, J., Garcia-Valls, R. et al. Characteristics of lignin obtained from steam-exploded softwood with soda/anthraquinone pulping. Wood Sci Technol 37, 309–320 (2003). https://doi.org/10.1007/s00226-003-0183-7

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  • DOI: https://doi.org/10.1007/s00226-003-0183-7

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