Results 121 to 130 of about 894 (162)

Chlorine Dioxide for Bleaching, Industrial Applications and Water Treatment

Indian Chemical Engineer, 2014
AbstractAs an oxidant, chlorine dioxide is highly effective at alkaline pH. Chlorine dioxide exists as a free-radical monomer. It attacks the electron-rich centres of organic molecules and typically reacts with organics as an oxidant with little or no chlorination.
S B Jonnalagadda, Srinivasu Nadupalli
exaly   +2 more sources

Studies on Bleaching Process with Chlorine Dioxide on Cotton Fabric

Advanced Materials Research, 2011
This paper discussed the bleaching process with chlorine dioxide on cotton fabric. Tests of the whiteness, capillary effect, and strength were made and the best bleaching process with chlorine dioxide was determined. Studies showed that compared with the conventional bleaching process of hydrogen peroxide, the whiteness and strength of cotton fabric ...
Jian Feng Di, Jia Yong Tang, Yong Tang Jia   +2 more
exaly   +2 more sources

New Insights into Lignin Modification During Chlorine Dioxide Bleaching Sequences (I): Chlorine Dioxide Delignification

Journal of Wood Chemistry and Technology, 2005
Abstract Chlorine dioxide delignification (D0) modifies kraft residual lignin by oxidizing phenolic groups to both quinonoid and muconic structures. Results from various in situ analyses (i.e., kappa/Klason lignin, methanol, and methoxyl group analyses) demonstrated that the D0 stage preferentially oxidizes phenolic entities to quinones over muconic ...
Lucian Lucia, Brian Brogdon
exaly   +2 more sources

Reactions of aldehydes with chlorous acid and chlorite in chlorine dioxide bleaching

Holzforschung, 2010
Abstract The role of chlorine (III) compounds, i.e. chlorous acid (HClO2) and chlorite (ClO2 -), in chlorine dioxide bleaching were investigated by treating different pulps with Cl(III). It was discovered that in addition to its fully inorganic reactions, chlorous acid is consumed by organic structures present in the pulp ...
Tapani Vuorinen, Susanna Kuitunen, Tuula Lehtimaa   +2 more
exaly   +2 more sources

Inorganic Reactions in Chlorine Dioxide Bleaching of Softwood Kraft Pulp

Journal of Wood Chemistry and Technology, 2006
Abstract A softwood kraft pulp (27 kappa) was bleached with chlorine dioxide to various end pH values. The formation of chlorite, chlorate, and chloride was measured to quantify the amount of chlorine dioxide wasted as a function of pH during a Do (pre‐bleaching) stage. Chlorate formation increased with a decrease in final pH.
Hasan Jameel, John F Kadla
exaly   +2 more sources

Hot chlorine dioxide bleaching – A modified approach

Nordic Pulp and Paper Research Journal, 2004
Martin Ragnar
exaly   +2 more sources

The fate of chlorine species during high temperature chlorine dioxide bleaching

Nordic Pulp and Paper Research Journal, 2005
Jorge Luiz Colodette, Gustavo Ventorim
exaly   +2 more sources

THE INFLUENCE OF THE BLEACHING MEDIUM ON CHLORINE DIOXIDE DELIGNIFICATION

Journal of Wood Chemistry and Technology, 2001
Chlorine dioxide delignification (D0) stages performed in 90% ethanol resulted in post-D0 kappa numbers that were 2 to 2.5 units lower than those performed in water. In spite of the reduction in kappa number, various gravimetric and UV spectroscopic techniques for measuring residual lignin indicated that the ethanol medium did not significantly enhance
Brian N. Brogdon, Donald R. Dimmel, Thomas J. McDonough   +2 more
openaire   +1 more source

Pretreatment of Chlorine Dioxide Solution for Pulp Bleaching

Journal of Biobased Materials and Bioenergy, 2019
Adsorbable organic halogen (AOX) is mainly produced by the reaction of residual lignin and chlorinated bleaching agents during bleaching processes. The formation of AOX can be reduced via optimization, addition of chemical additives, and/or pretreatment processes. Only a few studies exist on the effective purification of chlorine dioxide solutions and
Shuangquan Yao, Baojie Liu, Shuangxi Nie, Shiwei Wang, Chengrong Qin, Shuangfei Wang   +5 more
openaire   +1 more source