Results 101 to 110 of about 17,378 (210)
Evaluation of kraft cooking behaviour for six different softwoods species [PDF]
, 2010 The main goal of this paper is to observe de differences of behaviour between six softwoods species during the kraft cooking sequence, knowing that morphological, physicochemical and hygroscopic characters are different.
Anjos, O. +3 more
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Impact of lignin and carbohydrate chemical structures on degradation reactions during hardwood kraft pulping processes [PDF]
BioResources, 2013 Most studies aimed at determining rates of hardwood delignification and carbohydrate degradation have focused on understanding the behavior of a single wood species.
Ricardo B. Santos +3 more
doaj
MOLYBDENUM CATALYZED ACID PEROXIDE BLEACHING OF EUCALYPTUS KRAFT PULP [PDF]
, 2008 Molybdenum catalyzed peroxide bleaching (PMo Stage) consists of pulp treatment with hydrogen peroxide under acidic conditions in the presence of a molybdenum catalyst.
Jorge L. Colodette +4 more
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Evaluation of kraft cooking behaviour for different hardwood species [PDF]
, 2010 In this study six wood species (birch, chestnut, oak, beech, poplar and eucalyptus) were analysed separately. Lignin content, Polysaccharides content (cellulose and hemicelluloses), Yield, Hexenuronic acids were evaluated for three cooking temperatures
Anjos, O. +3 more
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BioResources, 2013 The main challenge in the oxygen delignification process is the improvement of selectivity. To further understand the effect of the amount of hydroxyl radicals on the selectivity of oxygen delignification, in this work, the hydroxyl radicals were generated by the improved Fenton reaction system and were quantified by UV spectrophotometry.
Shilin Cao +5 more
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BioResourcesPartial delignification of alder wood specimens was performed with alkaline sulfite and peracetic acid (PAA) methods, and subsequently the delignified samples were saturated with furfuryl alcohol, as an eco-friendly chemical.
Seyed Mohammad Hossein Yahyaee +3 more
doaj
Enzyme loading dependence of cellulose hydrolysis of sugarcane bagasse
Química Nova, 2012 The enzymatic hydrolysis of steam-pretreated sugarcane bagasse, either delignified or non-delignified, was studied as a function of enzyme loading. Hydrolysis experiments were carried out using five enzyme loadings (2.5 to 20 FPU/g cellulose) and the ...
Carlos Martín +4 more
doaj +1 more source
Application of a Doehlert experimental design for optimizing the dioxane organosolv extraction of lignin from hydrolyzed almond shells [PDF]
, 2011 The solubility of lignin from hydrolyzed almond (Prunusamygdalus) shells in 1,4-dioxane–water mixtures (dioxaneconcentration, 0-100% vol.) and different extraction conditions [extraction temperature (150-230oC) and cookingtime (10-40 min)] was studied ...
López-Cremades, Francisco +2 more
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Action of Soft Rot- and White Rot Fungi on Partially Delignified Softwoods [PDF]
, 1976 この論文は国立情報学研究所の学術雑誌公開支援事業により電子化されました。Fourty-four species of softwoods were partially delignified with acidified sodium chlorite for 6 hours at 40℃ and exposed to a soft rot fungus, Chaetomium globosum KUNZE, for 8 weeks at 28℃. The weight losses after the
NISHIMOTO, Koichi, TAKAHASHI, Munezoh
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Delignification in Alkaline Sulfite Cooking
The Journal of the Society of Chemical Industry, Japan, 1963 亜硫酸ナトリウムに炭酸水素ナトリウム,炭酸ナトリウム,水酸化ナトリウム,硫化ナトリウムなどを添加した薬液を用いて,アルカリ性亜硫酸塩蒸解の速度論的な研究を行ない,その脱リグニン機構について検討した。(1)炭酸水素ナトリウム,炭酸ナトリウムを添加した弱アルカリ性蒸解においては,リグニンに結合したイオウはすべてスルホン基で,そのスルホン化度は相当に高い(4～6%S/lignin)。脱リグニンの進行模様は,既報のpH6.3の亜硫酸塩蒸解のそれと類似している。(2)水酸化ナトリウム,硫化ナトリウムを添加した強アルカリ性蒸解においては,リグニンのスルホン化はわずかしか進行しない(0.3% S/lig.) 。その全イオウ含量(1～2% ) がスルホン基に相当するものよりも高いことから ...
openaire +2 more sources