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Selective froth flo...
Selective froth flotation of pitch components from spruce TMP process water
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- Strand, Anders (författare)
- Åbo Akademi Finland / Turku
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- Zasadowski, Dariusz, 1980- (författare)
- Mittuniversitetet,Institutionen för tillämpad naturvetenskap och design (-2013),Water Chemistry
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- Norgren, Magnus (författare)
- Mittuniversitetet,Institutionen för tillämpad naturvetenskap och design (-2013),Water Chemistry
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- Hedenström, Erik (författare)
- Mittuniversitetet,Institutionen för tillämpad naturvetenskap och design (-2013),Organic Chemistry
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- Willför, Stefan (författare)
- Åbo Akademi Finland / Turku
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- Sundberg, Anna (författare)
- Åbo Akademi Finland / Turku
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(creator_code:org_t)
- 2012
- 2012
- Engelska.
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Ingår i: Appita journal. - 1038-6807. ; 65:4, s. 337-346
- Relaterad länk:
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https://miun.diva-po... (primary) (Raw object)
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- Selective removal of dissolved and colloidal pitch components from an unbleached thermomechanical pulp (TMP)pressate by addition of a cationic foaming agent, dodecyltrimethylammonium chloride (DoTAC), and subsequent frothflotation was assessed. The experiments were conducted with varying pH, temperature, and concentrations of DoTACand calcium. The concentrations of pitch components, lignans, and dissolved polysaccharides were determinedbefore and after flotation.All pitch components were removed more efficiently by flotation at pH 5 and 3.5 than by flotation at pH 7.6. Resinand fatty acids were removed to a higher degree than neutral pitch substances at all the tested pH levels. Most of thewater-soluble uronic acids and galactoglucomannans stayed in the TMP water after flotation.Froth flotation with DoTAC was an effective way of selectively removing colloidal and dissolved pitch. Removal of pitch,especially of resin acids, at an early stage should be beneficial to the overall papermaking process.
Ämnesord
- NATURVETENSKAP -- Kemi -- Fysikalisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Physical Chemistry (hsv//eng)
Nyckelord
- Colloidal pitch
- wood resin
- mechanical pulp
- flotation
- anionic trash
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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