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Refiner bleaching i...
Refiner bleaching in a peroxide-based ATMP process compared with conventional bleaching
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- Gorski, Dmitri (author)
- Mittuniversitetet,Institutionen för tillämpad naturvetenskap och design (-2013),FSCN
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- Johansson, L (author)
- Paper and Fibre Research Institute (PFI), Trondheim, Norway
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- Engstrand, Per (author)
- Mittuniversitetet,Institutionen för tillämpad naturvetenskap och design (-2013),FSCN
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(creator_code:org_t)
- Walter de Gruyter GmbH, 2012
- 2012
- English.
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In: Holzforschung. - : Walter de Gruyter GmbH. - 0018-3830 .- 1437-434X. ; 66:3, s. 275-281
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Abstract
Subject headings
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- The aim of this study was to compare refiner bleaching with conventional laboratory bleaching by means of hydrogen peroxide and magnesium hydroxide. Refiner bleaching in this study was a part of the ATMP (advanced thermo mechanical pulping) process, in which bleaching chemicals are added to the first stage refiner. Unbleached reference pulp which underwent similar mechanical treatment as refiner bleached pulp was used for laboratory bleaching. Bleaching efficiency was found to be almost equal for pilot scale refiner bleaching and conventional laboratory bleaching. A brightness increase of 10 ISO was reached with addition of 26 kg t -1 hydrogen peroxide leading to a final brightness of 66 ISO using both methods. Slightly more COD (52kg t -1 compared with 46 kg t -1) was generated in refiner bleaching compared with conventional laboratory bleaching to equal brightness with the same chemicals added. © 2012 by Walter de Gruyter Berlin Boston 2012.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Pappers-, massa- och fiberteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Paper, Pulp and Fiber Technology (hsv//eng)
Keyword
- advanced thermo mechanical pulping (ATMP); COD; hydrogen peroxide; magnesium hydroxide; refiner bleaching
Publication and Content Type
- ref (subject category)
- art (subject category)
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