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Use of chelating surfactants as complexing agents for removal of manganese from mechanical pulp fibres prior to hydrogen peroxide bleaching.
Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences, Engineering and Mathematics. (FSCN)
Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences, Engineering and Mathematics. (FSCN)ORCID iD: 0000-0002-0770-2086
Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences, Engineering and Mathematics. (FSCN)
SCA R&D, Sundsvall, Sweden.
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2011 (English)In: 16th International Symposium on Wood, Fiber and Pulping Chemistry - Proceedings, ISWFPC / [ed] Wang, L.; Kuang, S.; Hou, Q.; Cao, C.;Si, C.; Zhang, H., Tianjin: China Light Industry Press , 2011, p. 682-686Conference paper, Published paper (Refereed)
Abstract [en]

In this investigation a new type of recoverable complexing agent (chelating surfactant) has been compared with a conventional complexing agent (DTPA) in the metal ion management of thermomechanical pulps (TMP) to be hydrogen peroxide bleached. After different degrees of washing of the pulps, bleaching experiments at different total alkali charges were performed with and without sodium silicate additions, and the ISO brightness of hand-made sheets was measured. The residual hydrogen peroxide in the bleaching liquor was also determined. No significant difference in either the brightness development or the residual hydrogen peroxide content could be detected between the pulps treated with equivalent molar ratios of the different complexing agents. Furthermore, the recovery of the surfactant-manganese complexes from laboratory made white water by foam flotation was also studied. Two different foaming agents, SDS and DDAO, were tested. After an addition of 160 ppm of the latter surfactant, about 80% of the manganese chelates could be recovered in the foam, containing 3% of the initial water mass.

Place, publisher, year, edition, pages
Tianjin: China Light Industry Press , 2011. p. 682-686
Keywords [en]
chelating surfactants; complexing agents; manganese; mechanical pulp fibres; hydrogen peroxide bleaching
National Category
Chemical Engineering
Identifiers
URN: urn:nbn:se:miun:diva-14653Scopus ID: 2-s2.0-84855669771OAI: oai:DiVA.org:miun-14653DiVA, id: diva2:452277
Conference
16th International Symposium on Wood, Fiber and Pulping Chemistry, ISWFPC;Tianjin;8 June 2011through10 June 2011;Code88003
Projects
New separable complexing agentsCLEANAvailable from: 2011-10-28 Created: 2011-10-28 Last updated: 2016-09-29Bibliographically approved

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Högberg, IdaZasadowski, DariuszKarlsson, AnetteAndersson, FredrikHedenström, ErikEdlund, HåkanNorgren, Magnus

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Högberg, IdaZasadowski, DariuszKarlsson, AnetteAndersson, FredrikHedenström, ErikEdlund, HåkanNorgren, Magnus
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