Results 11 to 20 of about 3,771 (202)

Kraft Lignin Depolymerization in an Ionic Liquid without a Catalyst

BioResources, 2015
In this paper, the depolymerization of lignin was successfully achieved by the thermal treatment of kraft lignin in butyl-1,8-diazabicyclo[5.4.0]undec-7-enium chloride ([DBUC4+][Cl-]) without a catalyst.
Amadou Diop, Khalil Jradi, Claude Daneault, Daniel Montplaisir   +3 more
doaj   +1 more source

Qualitative Structural Characterization of Two Lignin Samples and Quantitative Determination of Hydroxyl and Methoxyl Functional Groups in Kraft Lignin via Acetylation [PDF]

تحقیقات علوم چوب و کاغذ ایران, 2017
In this research, two types of lignin, i.e. one extracted from industrial waste water of the Iran wood and paper (choka) factory as black liquor and another provided from Aldrich company, were studied.
Mehdi Abdolahi, Said amir Mosavian, Akbar Varamsh, Amin Asadi   +3 more
doaj   +1 more source

Tailor-made alkaliphilic and thermostable fungal laccases for industrial wood processing

Biotechnology for Biofuels and Bioproducts, 2022
Background During the kraft process to obtain cellulosic pulp from wood, most of the lignin is removed by high-temperature alkaline cooking, released in the black liquors and usually incinerated for energy. However, kraft lignins are a valuable source of
David Rodríguez-Escribano, Rocío Pliego-Magán, Felipe de Salas, Pablo Aza, Patrizia Gentili, Petri Ihalainen, Thomas Levée, Valérie Meyer, Michel Petit-Conil, Sandra Tapin-Lingua, Michael Lecourt, Susana Camarero   +11 more
doaj   +1 more source

Kraft Lignin Conversion into Energy Carriers under the Action of Electromagnetic Radiation

Journal of Chemistry, 2019
In this work, it was found that the deposition of iron salts (iron acetate) on kraft lignin at extremely low concentrations of 0.1 wt.% leads to a sharp increase in the absorbing capacity of microwave radiation by kraft lignin at its power of 1 kW and ...
P. Zharova, O. V. Arapova, G. I. Konstantinov, A. V. Chistyakov, M. V. Tsodikov   +4 more
doaj   +1 more source

Lignin Phenol Formaldehyde Resoles Using Base-Catalysed Depolymerized Kraft Lignin [PDF]

Polymers, 2018
Lignin phenol formaldehyde (LPF) resols were produced using depolymerized lignin fractions at various levels of phenol substitution (50 to 70 wt %). To produce monomeric-rich (BCD-oil) and oligomeric (BCD-oligomers) bio-based phenolic compounds, softwood kraft lignin was base-catalysed degraded.
Pia Solt, Björn Rößiger, Johannes Konnerth, Hendrikus Van Herwijnen   +3 more
openaire   +2 more sources

Efeito do conteúdo e da natureza da lignina residual na eficiência e na seletividade do branqueamento com ozônio Effect of residual lignin content and nature on the efficiency and selectivity of ozone bleaching

Revista Árvore, 2003
Neste estudo foram avaliados os efeitos do conteúdo e da natureza da lignina residual na eficiência e na seletividade do branqueamento com ozônio de polpa kraft convencional (kraft) e pré-deslignificada com oxigênio (kraft-O).
Elenice Pereira Maia, Jorge Luiz Colodette   +1 more
doaj   +1 more source

Dissolution of kraft lignin in alkaline solutions [PDF]

International Journal of Biological Macromolecules, 2020
Lignins are among the most abundant renewable resources on the planet. However, their application is limited by the lack of efficient dissolution and extraction methodologies. In this work, a systematic and quantitative analysis of the dissolution efficiency of different alkaline-based aqueous systems (i.e.
Melro, Elodie, Filipe, Alexandra, Sousa, Dora, Valente, Artur J. M., Romano, Anabela, Antunes, Filipe E., Medronho, Bruno   +6 more
openaire   +3 more sources

Preparation and Characterization of Lignin Polyols from the Residues of Oil Palm Empty Fruit Bunch

BioResources, 2015
In this work, lignin polyols were prepared from the liquefaction of kraft lignin and from the direct liquefaction of Elaeis guineensis lignocellulosic waste. The liquefaction reaction was performed with polyhydric alcohols using sulfuric acid as catalyst
Abbas Hasan Faris, Mohamad Nasir Mohamad Ibrahim, Afidah Abdul Rahim, Mohd Hazwan Hussin, Nicolas Brosse   +4 more
doaj   +1 more source

Kraft Lignin Behaviour in Diffused Aeration of Kraft Effluents

Water Science and Technology, 1988
Diffused aeration experiments carried out using a Kraft black liquor in batch reactors at 21±1ΩC were performed in order to characterize the relative importance of the mechanisms of chemical oxidation and condensation of lignin structures upon COD, lignin and colour removal and also to evaluate the influence of agitation intensity on these mechanisms ...
L. Larrea, C.F. Forster, D. Melé
openaire   +1 more source

Mimicking the Fungal Decay Strategy for Promoting the Bacterial Production of Polyhydroxyalkanoate from Kraft Lignin

Fermentation, 2023
Producing polyhydroxyalkanoate (PHA) from lignin through biological conversion has great further potential, but is held by its high heterogeneous characteristic toxicity of the depolymerized products, and low bioconversion of the depolymerized products ...
Xiao Fu, Qing Gong, Xuan Liu, Ze Zheng, Xiaoyu Zhang, Fuying Ma, Hongbo Yu, Shangxian Xie   +7 more
doaj   +1 more source