[PDF] Top 20 Empirical modeling of chlorine dioxide delignification of oxygen-delignified hardwood kraft pulp
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Empirical modeling of chlorine dioxide delignification of oxygen-delignified hardwood kraft pulp
... oven-dried pulp (weight)], acid charge [1.0%–4.0% on oven-dried pulp (weight)], temperature (40°–95°C), and re- tention time (10–90 min), were considered in the bleaching experiments using response surface ... See full document
6
Evaluation of chloroform formed in process of kraft pulp bleaching mill using chlorine dioxide
... a kraft pulp mill that used an elemental chlorine-free (ECF) bleaching line with chlorine dioxide as well as an effluent treatment ...of hardwood oxygen- ... See full document
6
Alkaline Chlorine Dioxide Bleaching Of Cloned Eucalyptus Wood 2012 and Its Environmental Impact
... southern hardwood kraft pulps with high initial kappa number have lower resistance to oxygen delignifcation and a higher reaction rate compared to pulps with low initial kappa number ...standard ... See full document
10
Examination of polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans in process water of kraft pulp bleaching mill using chlorine dioxide from the aspect of environmental water quality
... two pulp lines with a capacity of 400 000 tons/year before construction of an ECF ...This pulp plant has incorporated extended kraft cooking digestion, two-stage oxygen delignification, ... See full document
6
Biomimetic TCF Bleaching of Pulp by Simple Inorganic Complexes of Cupric/Cobalt Acetate
... high delignification and brightness ...of pulp, some improvements in tensile and tear strength were observed after the application of the new TCF bleaching ...highest delignification, brightness and ... See full document
7
Charge properties of fibres in the paper mill environment. Part I, Effect of electrical conductivity
... observed streaming potential tended to decay following each addition of poly-DADMAC to the bleached hardwood kraft fiber slurry at a conductivity of 1.05 mS/cm. Decay curves of this general nature have been ... See full document
29
Role of Tween 80 in biobleaching of unbleached hardwood kraft pulp with manganese peroxidase
... Despite the fact that MnP activity decreased similarly with each MnP treat- ment, the residual MnP activities in the presence of sur- factants were always higher[r] ... See full document
6
Screening of wood-rotting fungi for kraft pulp bleaching by the Poly R decolorization test and biobleaching of hardwood kraft pulp byPhanerochaete crassa WD1694
... We also studied the ligninolytic enzymes secreted and the effect of cultivation conditions on biobleaching by Phanerochaew crassa WD1694, the fungus that showed the[r] ... See full document
6
Fundamentals of oxygen delignification. Part II, Functional group formation/elimination in residual Kraft lignin
... The presence of carboxylic acid groups on the lignin ma- cromolecule is considered to promote lignin solubilization in alkaline media during oxygen delignification (10, 23) or other bleaching stages (25). ... See full document
10
Disinfection and environmental studies on pathogenic free living amoebae : a thesis presented in partial fulfillment of the requirements for the degree of Master of Science in Microbiology at Massey University
... Further study on the effect of Baquacil, chlorine and chlorine dioxide on amoebae, in conditions involving the use of a known Biochemical Oxygen Demand BOD, a known bacteria concentratio[r] ... See full document
221
Delignification of Kraft-AQ Southern Pine Pulp with Hydrogen Peroxide Catalyzed by Mn(IV)2-Me4DTNE
... “process modeling”, the term “process simulation” is often viewed as a special type of modeling with a distinct purpose to describe the physical and/or chemical path or process that causes the ...the ... See full document
127
Studies of gaseous alkyl nitrite and nitrous acid reactions
... used in the hydrogen atom s·tudy was originally assembled with the intention of investigating the fast reactions of chlorine dioxide with hydrogen, oxygen and nitrogen atoms, the oxygen [r] ... See full document
229
Behavioural analysis of a nonionic detergent in the kraft pulp washing process using cryo-time-of-flight secondary ion mass spectrometry and cryo-scanning electron microscopy
... the kraft pulp decolouring mechanism on using a nonionic detergent, the pulp washing process and the resulting pulp handsheets are investigated by examining the brightness, kappa number, ... See full document
7
Evaluation of the extent of the oxidation reaction during chlorine bleaching of pulp
... It was once supposed that during chlorine bleaching the substitution reaction contributed more to delignification than oxidation, and that oxidation should be suppre[r] ... See full document
5
A Convergent Electrosynthesis for Chlorine Dioxide
... production of Cu2O[2] Other simultaneous electrosynthetic processes have been reviewed elsewhere[1,2,4] and we have summarized several proposed applications for the environmental electro[r] ... See full document
11
Dewatering of refined, bleached hardwood kraft pulp by gravity, vacuum, and centrifugation with applied pressure. Part 1. Physical and ionic effects
... Foi empregado urn teste modificado de valor de retencao de agua (MWRV - modified water retention value).. com pressao aplicada para umedecer plugues de fibras du rante sua [r] ... See full document
14
The Generation of Chlorine Dioxide for drinking water treatment
... Znižanje koncentracije klor- ovega dioksida je bilo 36 % zaradi difuzije plina skozi steno posode in oksidacije 35 % raztopine v klorat (V) (tvorba klorata (V) je bila omogo[r] ... See full document
10
Sulfuric acid bleaching of kraft pulp II: Behavior of lignin and carbohydrate during sulfuric acid bleaching
... Two lignin samples were prepared from the effluents gained after both beech kraft pulp bleaching and red pine kraft pulp bleaching: One is acid lignin, which was pr[r] ... See full document
6
Influence of Extractives on the Bleachability of Batch Extended Delignified Kraft Pulps
... extended delignification process and pulp properties [1, 2, 3, 4, 5, 6, 7, ...extended delignified kraft pulps are harder to bleach than conventional kraft ...extended ... See full document
159
Engineered Biomass Deconstruction: A Multidisciplinary Investigation Towards Understanding Mechanical Refining and its Applications in Lignocellulosic Biorefineries.
... bleached hardwood kraft pulp, BHKP-VB90m=bleached hardwood kraft pulp with 90 minute valley beating, BHKP-PFI10k=bleached hardwood kraft pulp with 10,000 PFI ... See full document
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