Results 11 to 20 of about 23,214 (252)
Lignin Valorization for Added-Value Chemicals: Kraft Lignin versus Lignin Fractions
ChemEngineering, 2023 Lignin is a raw material that can potentially be converted into valuable compounds through depolymerization reactions in addition to its use as a polymer or material. However, the chemical recalcitrance and the heterogeneous composition and structure of lignin make it challenging to establish processes that add value to this complex aromatic biopolymer.
Carina A. E. Costa +3 more
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Journal of Wood Science, 2021 Kraft lignin is a valuable aromatic renewable resource that is discharged in large quantities during the kraft pulping process. In this study, kraft lignin derivatives with improved solubility and thermal properties were prepared by a facile chemical ...
Shiori Suzuki, Tadahisa Iwata
doaj +1 more source
Bacterial conversion of depolymerized Kraft lignin [PDF]
Biotechnology for Biofuels, 2019 Lignin is a potential feedstock for microbial conversion into various chemicals. However, the degradation rate of native or technical lignin is low, and depolymerization is needed to obtain reasonable conversion rates. In the current study, base-catalyzed depolymerization-using NaOH (5 wt%)-of softwood Kraft lignin was conducted in a continuous-flow ...
Krithika Ravi +6 more
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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 +3 more
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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 +3 more
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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 +11 more
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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 +4 more
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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 +3 more
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Lignin engineering in forest trees [PDF]
, 2019 Wood is a renewable resource that is mainly composed of lignin and cell wall polysaccharides. The polysaccharide fraction is valuable as it can be converted into pulp and paper, or into fermentable sugars.
Alvarenga Chanoca, Alexandra +2 more
core +1 more source
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 +1 more
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