A comparison of bleachability in TCF sequences for alkaline sulphite and kraft pulps
1996 (English)In: Journal of Pulp and Paper Science (JPPS), ISSN 0826-6220, Vol. 22, no 8, J296-J300 p.Article in journal (Refereed) Published
The bleachability in different totally chlorine-free (TCF) bleaching sequences was investigated for two types of alkaline sulphite pulps, ASAM and MSSAQ, and compared with that of pulps produced by different new and industrially applied modified kraft pulping processes. The TCF sequences included oxygen, ozone, peroxide and complexing agent stages. The alkaline sulphite pulps were found to be easier to bleach in terms of the consumption of oxidative agents required to reach a given brightness than the pulps produced by the different modified kraft pulping processes. The relationship between pulp brightness and pulp viscosity was also much better for the sulphite pulps, although the new types of kraft pulps are gradually approaching the level of the alkaline sulphite pulps in this respect. There was no significant difference between the ASAM (alkaline sulphite anthraquinone methanol) and the two-stage MSSAQ (minisulphide sulphite anthraquinone) processes.
Place, publisher, year, edition, pages
1996. Vol. 22, no 8, J296-J300 p.
kraft pulps, oxygen, delignification, chlorine free bleaching, multistage process, selectivity, brightness, viscosity, softwoods, ozone, hydrogen peroxide, alkaline pulps, sulfite pulps
Paper, Pulp and Fiber Technology Materials Engineering
IdentifiersURN: urn:nbn:se:kth:diva-13899ISI: A1996VD41400007OAI: oai:DiVA.org:kth-13899DiVA: diva2:328085
QC 201007012010-07-012010-07-012010-07-01Bibliographically approved