A Novel Ozone Bleaching Technology for the Alcell® Process
- 1 January 1996
- journal article
- research article
- Published by Taylor & Francis in Journal of Wood Chemistry and Technology
- Vol. 16 (4) , 367-380
- https://doi.org/10.1080/02773819608545821
Abstract
The ALCELL ® process is an ethanol-based autocatalyzed solvent pulping technology which is being developed by Repap Enterprises Inc. The paper will present a novel ozone bleaching process (Zn), which is compatible with the present ALCELL ® technology. It is based on that an acidified ethanol-water mixture is used as the pulp impregnation liquor during ozone bleaching. It was found that the presence of ethanol dramatically reduces that carbohydrate degradation while delignification is not affected. Process parameters in the Zn stage, including the ethanol concentration and pH, on the delignification efficiency and carbohydrate degradation were studied. The underlying mechanism of this novel bleaching technology will also be discussed.Keywords
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