Sökning: onr:"swepub:oai:DiVA.org:kth-16900" > Separate bleaching ...
Fältnamn | Indikatorer | Metadata |
---|---|---|
000 | 02535naa a2200409 4500 | |
001 | oai:DiVA.org:kth-16900 | |
003 | SwePub | |
008 | 100805s2007 | |||||||||||000 ||eng| | |
024 | 7 | a https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-169002 URI |
024 | 7 | a https://doi.org/10.1080/027738107014868812 DOI |
040 | a (SwePub)kth | |
041 | a engb eng | |
042 | 9 SwePub | |
072 | 7 | a ref2 swepub-contenttype |
072 | 7 | a art2 swepub-publicationtype |
100 | 1 | a Brännvall, Elisabetu KTH,Fiber- och polymerteknologi4 aut0 (Swepub:kth)u1bug0dr |
245 | 1 0 | a Separate bleaching of pulp fractions enriched in earlywood and latewood fibers |
264 | 1 | b Informa UK Limited,c 2007 |
338 | a print2 rdacarrier | |
500 | a QC 20100525 | |
520 | a Unbleached softwood kraft pulp was fractionated in hydrocyclones into a fine fraction, enriched in earlywood fibers, and a coarse fraction, enriched in latewood fibers. The response to individual bleaching chemicals and the bleachability in bleaching sequences of the pulp fractions was studied. The light absorption coefficient, light scattering coeffient, and brightness were higher in the unbleached fine fraction than in the coarse fraction. Hydrogen peroxide managed to reduce the light absorption coefficient of the earlywood enriched fine fraction more efficiently than that of the latewood enriched fraction. In the TCF-sequence the light absorption coefficient of the fine fraction was reduced to the level of the coarse fraction at a given consumption of bleaching chemicals. In the ECF-sequence the difference in light absorption coefficient remained between the fractions. At a given consumption of bleaching chemicals, the fine fraction had higher brightness than the coarse fraction, 2%- and 1%-units on the ISO-scale in the TCF and ECF bleaching sequence, respectively. | |
653 | a softwood | |
653 | a bleaching response | |
653 | a latewood fibers | |
653 | a earlywood fibers | |
653 | a hydrocyclone | |
653 | a fractionation | |
653 | a loblolly-pine | |
653 | a paper | |
700 | 1 | a Tormund, Disa4 aut |
700 | 1 | a Bakkstrom, Marie4 aut |
700 | 1 | a Bergstrom, Jonas4 aut |
700 | 1 | a Tubek-Lindblom, Anna4 aut |
710 | 2 | a KTHb Fiber- och polymerteknologi4 org |
773 | 0 | t Journal of wood chemistry and technologyd : Informa UK Limitedg 27:2, s. 99-112q 27:2<99-112x 0277-3813x 1532-2319 |
856 | 4 8 | u https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-16900 |
856 | 4 8 | u https://doi.org/10.1080/02773810701486881 |
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