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Items for "chlorine dioxide"

A new method for the titration of free phenolic groups in pulps

A fast and semi-quantitative wet chemical method was developed for the titration of free phenolic groups in residual lignins of pulps...

Keywords: cellulose pulps, chemical analysis, chlorine dioxide, in-pulp method, lignins, phenolic hydroxyl groups, rapid testing method

05/2007 | Holzforschung, Walter de Gruyter
The role of non-phenolic lignin in chlorate-forming reactions during chlorine dioxide bleaching of softwood kraft pulp

The affect of phenolic hydroxyl groups on the reaction efficiency during chlorine dioxide pre-bleaching of a softwood kraft pulp was investigated...

Keywords: chlorate, chlorine dioxide, inorganic reactions, Kinetics, phenolic hydroxyl groups

02/2005 | Holzforschung, Walter de Gruyter
Comparative effect of ozone, chlorine dioxide, and hydrogen peroxide on lignin: Reactions affecting pulp colour in the final bleaching stage

Several lignin-like model compounds (vanillin, syringaldehyde, guaiacol, syringol, p-benzoquinone, naphthoquinone) and commercial softwood lignin were submitted to small charges of ozone, chlorine dioxide and hydrogen peroxide in aqueous solution under conditions simulating a final bleaching stage...

Keywords: bleaching, chlorine dioxide, colour, Hydrogen Peroxide, lignin, mechanisms, model compounds, Ozone, reactions

11/2007 | Holzforschung, Walter de Gruyter