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Items for "Ozone"

Effect of ozone on ruthenium species in alkaline medium – Part II: Oxidation of pentahydroxo nitrosyl ruthenate(II) ion RuNO(OH)₅^2-

Oxidation of the nitrosyl ruthenium complex RuNO(OH)₅^2- has been carried out in sodium hydroxide solutions in contact with a gas flow containing ozone...

Keywords: Ruthenium, Ozone, Nitrosyl Complex, Oxidation, Alkaline medium

01/2006 | Radiochimica Acta, Oldenbourg Wissenschaftsverlag

Effect of ozone on ruthenium species in alkaline medium – Part I: Oxidative dissolution of ruthenium dioxide hydrate

Several ruthenium species compounds are typically encountered in waste management from nuclear fuel reprocessing operations...

Keywords: Ruthenium, Ozone, Solid dissolution, Ruthenate catalysis, Alkaline medium

01/2006 | Radiochimica Acta, Oldenbourg Wissenschaftsverlag

High-consistency ozonation of hardwood kraft pulp

At present, ozone is one of the main chemicals in elemental chlorine-free (ECF) and totally chlorine-free (TCF) bleaching sequences...

Keywords: brightness, hardwood, hexenuronic acid groups, kappa number, Kinetics, kraft pulp, lignin, Ozone, shrinking core model, viscosity

11/2006 | 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