Selectiveness and efficiency of combined peracetic acid and chlorine dioxide bleaching stage for kraft pulp in removing hexeuronic acid

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Fältnamn	Indikatorer	Metadata
000		03151naa a2200481 4500
001		oai:DiVA.org:kth-32638
003		SwePub
008		110418s2011 \| \|\|\|\|\|\|\|\|\|\|\|000 \|\|eng\|
024	7	a https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-326382 URI
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 Tavast, Danielu KTH,Wallenberg Wood Science Center4 aut0 (Swepub:kth)u1z631wd
245	1 0	a Selectiveness and efficiency of combined peracetic acid and chlorine dioxide bleaching stage for kraft pulp in removing hexeuronic acid
264	1	c 2011
338		a print2 rdacarrier
500		a QC 20110418
520		a Combined peracetic acid and chlorine dioxide bleaching stages of unbleached and oxygen delignified hardwood and softwood kraft pulps were compared with conventional chlorine dioxide and peracetic acid stages as to kappa number and viscosity reduction, selectivity and reduction of hexenuronic acid content. The combined stages were more efficient in kappa number reduction than those with only chlorine dioxide. Part of the increased kappa number reduction was due to an improved degradation of hexenuronic acid. The stages where chlorine dioxide was added before the peracetic acid (DT) showed a higher selectivity than those in which the chemicals were added simultaneously (D+T); in turn, the latter were more efficient than the "pure" chlorine dioxide (D, D-0) and peracetic acid stages (T). However, peracetic acid and chlorine dioxide seemed to react with each other, leading to the degradation of both bleaching chemicals. The mechanisms and practical implementation of these bleaching sequences are discussed.
650	7	a TEKNIK OCH TEKNOLOGIERx Materialteknikx Pappers-, massa- och fiberteknik0 (SwePub)205032 hsv//swe
650	7	a ENGINEERING AND TECHNOLOGYx Materials Engineeringx Paper, Pulp and Fiber Technology0 (SwePub)205032 hsv//eng
653		a NaCl
653		a active chlorine
653		a D
653		a chlorine dioxide bleaching stage
653		a E
653		a alkaline extraction stage
653		a HexA
653		a hexenuronic acid
653		a O
653		a oxygen delignification stage
653		a T
653		a peracetic acid bleaching stage
653		a Cellulose and paper engineering
653		a Cellulosa- och pappersteknik
700	1	a Brännvall, Elisabethu KTH,Wallenberg Wood Science Center,Fiber- och polymerteknologi4 aut0 (Swepub:kth)u1bug0dr
700	1	a Lindström, Mikael E.u KTH,Wallenberg Wood Science Center,Fiber- och polymerteknologi4 aut0 (Swepub:kth)u1uxn4q9
700	1	a Henriksson, Gunnaru KTH,Wallenberg Wood Science Center,Fiber- och polymerteknologi4 aut0 (Swepub:kth)u1lkf75c
710	2	a KTHb Wallenberg Wood Science Center4 org
773	0	t Cellulose Chemistry and Technologyg 45:1-2, s. 89-95q 45:1-2<89-95x 0576-9787
856	4	u http://www.cellulosechemtechnol.ro/pdf/CCT1-2(2011)/p.89-95.pdfy Cellulose Chemistry and Technology
856	4 8	u https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-32638

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Av författaren/redakt...: Tavast, Daniel; Brännvall, Elisa ...; Lindström, Mikae ...; Henriksson, Gunn ...

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TEKNIK OCH TEKNOLOGIER: TEKNIK OCH TEKNO ...; och Materialteknik; och Pappers massa oc ...

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Av lärosätet: Kungliga Tekniska Högskolan

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