Results 101 to 110 of about 17,533 (207)
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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Menentukan PH Optimum di DO Stage untuk Mengurangi Konsumsi CIO2 pada Proses Pulp Bleaching di PT. RAPP [PDF]
, 2015 The process of bleaching is a chemical process that is used on chemically treated pulp and mechanical pulp aimed at increasing degrees of brightness according to the expected target.
', C. (Chairul) +2 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
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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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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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
Policy vs. Consumer Pressure: Innovation and Diffusion of Alternative Bleaching Technologies in the Pulp Industry [PDF]
In the late 1980s and early 1990s, concern over dioxin in both paper products and wastewater led to the development of techniques that reduced the use of chlorine in the pulp industry. Both regulatory and consumer pressure motivated this change.
David Popp +2 more
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Valorisation of lignin – Achievements of the LignoValue project [PDF]
Lignocellulosic biorefinery for production of biofuels, materials and chemicals requires valorization of all fractions including lignin. As a consequence of its poly-aromatic structure, lignin potentially serves as a source for aromatic chemicals.
Bridgwater, T. +8 more
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