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Manganese in the chlorine dioxide bleaching of kraft pulp
Journal of Applied Chemistry, 1964AbstractManganese in the pulp during the bleaching process has a marked effect in reducing the reflectance of the pulp. This effect is most notable in the chlorine dioxide bleaching stage. The effect is variable depending on the stage and solubility of the manganese contamination, the final pH of thc pulp, the filter water used in washing the pulp and ...
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Characterisation of pulp demethylation during chlorine dioxide bleaching
Wood Science and Technology, 1995The methoxyl loss from softwood kraft pulp during chlorine dioxide treatment can be accounted for by methanol and the methoxyl content of dissolved organic material in the bleach filtrate. This was established by a methoxyl group mass balance made at different bleaching times.
Y. Ni +2 more
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Formation of chlorine dioxide under laundry bleaching conditions
Journal of Environmental Engineering and Science, 2003Chlorite ion is a by-product of chlorine dioxide and is typically present at concentrations ranging from 0.3 to 1.0 mg/L in the finished water of systems using this oxidant in the treatment process. When combined with free chlorine, these two reactive ions have been shown to react to form chlorine dioxide. Chlorine dioxide concentrations formed in tap
Mary Carr, Kenneth Carlson, Dean Gregory
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Reactions of lignin in chlorine dioxide bleaching of kraft pulps
Research on Chemical Intermediates, 1995The reactions between chlorine dioxide and the residual lignin in oxygen-bleached softwood kraft pulps have been studied. In a first series, isolated lignin samples have been subjected to chlorine dioxide oxidation at different pH values and subsequently analysed by oxidative degradation and elemental analysis. Different analytical techniques have also
Göran Gellerstedt +3 more
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COMPETING/PARALLEL REACTION OF CHLORINE AND CHLORINE DIOXIDE DURING KRAFT PULP BLEACHING
Chemical Engineering Communications, 1993The nature of chlorine dioxide substitution for chlorine in the chlorination reaction sequence of pulp bleaching in not well understood. Multiple results may be obtained by simply altering the order of chlorine-chlorine dioxide addition and the amount of chlorine dioxide substitution. Kinetic curves for chlorine, chlorine dioxide, and various levels of
PETER W. HART, JEFFERY S. HSIEH
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Destruction of PCDD and PCDF in bleached pulp by chlorine dioxide treatment
Chemosphere, 1995Abstract Softwood pulp samples, containing polychlorinated dibenzo-p-dioxins and dibenzofurans (dioxins) were treated with chlorine dioxide and analyzed, before and after treatment, for the contents of dioxins. Two separate experiments were carved out under identical bleaching conditions - similar to the elemental chlorine free bleaching of kraft ...
Lars Renberg +2 more
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Degradation of dibenzodioxin during chlorine dioxide bleaching of kraft pulp
Environmental Science & Technology, 1992The degree of sorption of dihenzodioxin (DBD) to pulp varies with the lignin content of the latter. DBD is rapidly degraded by chlorine dioxide in aqueous solution but is much more stable in the presence of semibleached pulp, suggesting that sorbed DBD is far less reactive than the freely dissolved material.
Daube, A.K. +4 more
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A fundamental study of chlorine dioxide bleaching of kraft pulp
1992This item was digitized as part of a project to share McGill's intellectual legacy with the public. If you are the copyright holder or a relative of the copyright holder who is deceased, you may request withdrawal by emailing escholarship.library@mcgill.ca.
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Characteization of chlorine dioxide bleached pulp effluents
2020ÖZ KLOR DİOKSiT SELÜLOZ BEYAZLATMA ATIKSUYUNUN KARAKTERİZASYONU Şahin, Şebnem M. Yüksek Lisans, Çevre Mühendisliği Bölümü Tez Yöneticisi: Doç. Dr. Ülkü Yetiş Ortak Tez Yöneticisi: Prof. Dr. Celal Gökçay Ocak 1996, 92 sayfa Bu çalışmada klorlama aşamasında klor yerine klor dioksit kullanılmasının ve ekstraksiyon aşamasının oksijen ile güçlendirilmesinin
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SIMPLIFICATION OF THE CHLORINE DIOXIDE BLEACHING SYSTEM
Studies in Conservation, 1972A. Shahin, Otto Wachter
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