Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9610491 | Catalysis Today | 2005 | 6 Pages |
Abstract
The selectivity of the water-soluble and highly active catalyst bis(o-phenanthroline)Cu in the oxygen bleaching of pulp was explored in model compound studies. The experiments were carried out under reaction conditions typical for industrial oxygen bleaching (90 °C, pH 12, p(O2) 8 bar). The generation of hydrogen peroxide was an essential step in the oxidation of the lignin model compounds, veratryl alcohol and 2,2â²-biphenol. Unfortunately, bis(o-phenanthroline)Cu also catalysed the depolymerisation of the carbohydrate model compound, dextran, both with oxygen and with hydrogen peroxide. The results explain well the inadequate selectivity of bis(o-phenanthroline)Cu in the oxygen bleaching of pulp.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Catalysis
Authors
V.O. Sippola, A.O.I. Krause,