Total Chlorine-Free Bleaching of Populus deltoides Kraft Pulp by Oxone
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چکیده
منابع مشابه
Analysis of pitch deposits produced in kraft pulp mills using a totally chlorine free bleaching sequence.
Two organic deposits accumulated in a Kraft pulp mill during pulping of Eucalyptus globulus wood and throughout a TCF (totally chlorine free) bleaching sequence were characterized. One deposit was collected after cooking and an oxygen delignification stage while the other was collected after bleaching with hydrogen peroxide. The deposits were Soxhlet extracted with acetone, and the extracts red...
متن کاملEffects of Additives on Absorbable Organic Halide Reduction in Elemental Chlorine-Free Bleaching of Bagasse Kraft Pulp
In order to further reduce absorbable organic halide (AOX) formation in the bleaching effluent, NH2SO3H and DMSO were added during the elemental chlorine-free (ECF) bleaching (D0EpD1) of bagasse kraft pulp. In the D0 stage, AOX formation decreased by 10% with 0.1% NH2SO3H, and a reduction of 11.2% with 1.0% DMSO, respectively. Ultraviolet (UV) spectra, Fourier transform infrared spectroscopy (F...
متن کاملcomparison of soda and kraft pulp properties of populus deltoides sapwood and heartwood
this study was conducted to compare the yield and strength properties of soda and kraft pulp produced from populus deltoeides sapwood and heartwood. initially fiber length, lignin content in both sapwood and heartwood were measured. then from either sapwood or heartwood pulps were prepared with using soda and kraft processes, handsheets were made from this pulp and mechanical properties were me...
متن کاملManganese Peroxidase, Produced by Trametes versicolor during Pulp Bleaching, Demethylates and Delignifies Kraft Pulp.
Previous work has shown that Trametes (Coriolus) versicolor bleaches kraft pulp brownstock with the concomitant release of methanol. In this work, the fungus is shown to produce both laccase and manganese peroxidase (MnP) but not lignin peroxidase during pulp bleaching. MnP production was enhanced by the presence of pulp and/or Mn(II) ions. The maximum level of secreted MnP was coincident with ...
متن کاملBehaviour of Residual Lignin in Kraft Pulp During Bleaching
of Gasification of Black Liquor Char by actions of Some Sulfur Compounds, Inorg. Steam, IEC Research 30(7): 1594 (1991). Chem. 22(22):3243 (1983). 26. DEARNALEY, R.I., KERRIDGE, D.H. and 27. ZOU, X., Recovery of Kraft Black Liquor ROGERS, D.J., Molten Lithium Sulfate-SoIncluding Direct Causticization, Ph.D. Metallurgical Trans. B 19B(2):73 (1988). Thesis, McGill Univ. (1991). 28. WYNNYCKYJ, J.R...
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ژورنال
عنوان ژورنال: International Journal of Carbohydrate Chemistry
سال: 2015
ISSN: 1687-9341,1687-935X
DOI: 10.1155/2015/381242