Alkaline and Alkaline/oxidation pre-treatments of spruce wood (Picea abies) – Impact on the quality of kraft pulp
| Autor: | J. Dibdiaková, Milan Gaff, Z. Rázgová, M. Mamoň, Vladimir Vacek, J. Sivák, František Kačík, Rastislav Solar |
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| Rok vydání: | 2011 |
| Předmět: |
Paper
Environmental Engineering genetic structures Bioengineering engineering.material Kappa number Peroxide Polymerization chemistry.chemical_compound stomatognathic system Sodium Hydroxide Biomass Picea Hydrogen peroxide Waste Management and Disposal Triglycerides biology Plant Extracts Renewable Energy Sustainability and the Environment Chemistry Spectrum Analysis Pulp (paper) Fatty Acids Water Picea abies General Medicine Pulp and paper industry biology.organism_classification Wood Sterols stomatognathic diseases Kraft process Sodium hydroxide Monoterpenes engineering Oxidation-Reduction Kraft paper |
| Zdroj: | Bioresource Technology. 102:1921-1927 |
| ISSN: | 0960-8524 |
| Popis: | A comparable series of specimens from spruce wood were pre-treated with sodium hydroxide, sodium hydroxide and hydrogen peroxide, or per-acetic acid sequences. The pre-treatments reduced the yield of pulps and their Kappa number noticeably, diminished the degree of polymerization moderately, and increased their brightness. One-step peroxide bleaching of pulps from the pre-treated spruce wood resulted in their higher brightness compared to bleached pulp from sound wood. From the viewpoint of improved properties of pulp, the most efficient were the sodium hydroxide/per-acetic acid and per-acetic acid/sodium hydroxide sequences. The pre-treatments did not influence mechanical strength of the obtained pulps significantly. |
| Databáze: | OpenAIRE |
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