Search for dissertations about: "uniform delignification"
Found 5 swedish dissertations containing the words uniform delignification.
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1. Pulp strength enhancement by oxygen delignification
Abstract : Oxygen delignification is widely used in the pulp and paper industry as a part of delignification process between the kraft cook and bleaching. However, its potential has not been fully utilized. READ MORE
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2. Extended impregnation kraft cooking of softwood : Effects on reject, yield, pulping uniformity, and physical properties
Abstract : Converting wood into paper is a complex process involving many different stages, one of which is pulping. Pulping involves liberating the wood fibres from each other, which can be done either chemically or mechanically. READ MORE
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3. Improved selectivity in kraft cooking through changesin the cooking liquor concentration profiles
Abstract : In the production of bleached kraft pulp, extendeddelignification in the cooking stage is a method of reducingthe load on the receiving waters. A low lignin content (lowkappa number) also means a reduced need for bleachingchemicals. READ MORE
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4. Engineering of lignin in wood towards functional materials
Abstract : Through 270 million years of evolution, the finely tuned hierarchical structure of wood has been optimized for efficient nutrient transport and exceptional mechanical stability. Its distinctive orthotropic constitution can provide inspiration and design opportunities for the development of novel functional materials. READ MORE
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5. The cell wall ultrastructure of wood fibres : effects of the chemical pulp fibre line
Abstract : Knowledge of the ultrastructural arrangement within wood fibres is important for understanding the mechanical properties of the fibres themselves, as well as for understanding and controlling the ultrastructural changes that occur during pulp processing. The object of this work was to explore the use of atomic force microscopy (AFM) in studies of the cell wall ultrastructure and to see how this structure is affected in the kraft pulp fibre line. READ MORE