Selective hydrolysis of hexenuronic acid groups opens new possibilities for development of bleaching processes

Tapani Vuorinen; Pirjo Fagerström; Erkki Räsänen; Anne Vikkula; Kaj Henricson; Anita Teleman

Selective hydrolysis of hexenuronic acid groups opens new possibilities for development of bleaching processes

Tapani Vuorinen^*
, Pirjo Fagerström
, Erkki Räsänen
, Anne Vikkula
, Kaj Henricson
, Anita Teleman

^*Corresponding author for this work

VTT Technical Research Centre of Finland

Helsinki University of Technology

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

46 Citations (Scopus)

Abstract

Hexenuronic acid groups (HexA) in kraft pulps react with permanganate, chlorine, chlorine dioxide, ozone and peracids. HexA does not only increase bleaching chemical consumption in C-, D-, Z- and Paa-stages but is converted to products that are harmful in different aspects. A mild acid treatment hydrolyzes HexA strikingly selectively. Simultaneously the kappa number of a kraft pulp may decrease by several units. Only traces of other carbohydrate structures are dissolved. Cellulose is depolymerized to a limited extent but the selectivity of the treatment is still as high as in oxygen stage.

Original language	English
Title of host publication	ISWPC 9th International Symposium on Wood and Pulping Chemistry
Place of Publication	Montreal
Publisher	Canadian Pulp and Paper Association (CPPA)
Pages	M4-1-M4-4
ISBN (Print)	1-896742-14-9
Publication status	Published - 1997
MoE publication type	A4 Article in a conference publication
Event	ISWPC 9th International Symposium on Wood and Pulping Chemistry - Montreal, Canada Duration: 9 Jun 1997 → 12 Jun 1997

Conference

Conference	ISWPC 9th International Symposium on Wood and Pulping Chemistry
Country/Territory	Canada
City	Montreal
Period	9/06/97 → 12/06/97

Cite this

@inproceedings{8f39428714514c57be85a28a3b5b0638,

title = "Selective hydrolysis of hexenuronic acid groups opens new possibilities for development of bleaching processes",

abstract = "Hexenuronic acid groups (HexA) in kraft pulps react with permanganate, chlorine, chlorine dioxide, ozone and peracids. HexA does not only increase bleaching chemical consumption in C-, D-, Z- and Paa-stages but is converted to products that are harmful in different aspects. A mild acid treatment hydrolyzes HexA strikingly selectively. Simultaneously the kappa number of a kraft pulp may decrease by several units. Only traces of other carbohydrate structures are dissolved. Cellulose is depolymerized to a limited extent but the selectivity of the treatment is still as high as in oxygen stage.",

author = "Tapani Vuorinen and Pirjo Fagerstr{\"o}m and Erkki R{\"a}s{\"a}nen and Anne Vikkula and Kaj Henricson and Anita Teleman",

year = "1997",

language = "English",

isbn = "1-896742-14-9",

pages = "M4--1--M4--4",

booktitle = "ISWPC 9th International Symposium on Wood and Pulping Chemistry",

publisher = "Canadian Pulp and Paper Association (CPPA)",

address = "Canada",

note = "ISWPC 9th International Symposium on Wood and Pulping Chemistry ; Conference date: 09-06-1997 Through 12-06-1997",

}

Vuorinen, T, Fagerström, P, Räsänen, E, Vikkula, A, Henricson, K & Teleman, A 1997, Selective hydrolysis of hexenuronic acid groups opens new possibilities for development of bleaching processes. in ISWPC 9th International Symposium on Wood and Pulping Chemistry. Canadian Pulp and Paper Association (CPPA), Montreal, pp. M4-1-M4-4, ISWPC 9th International Symposium on Wood and Pulping Chemistry, Montreal, Quebec, Canada, 9/06/97.

Selective hydrolysis of hexenuronic acid groups opens new possibilities for development of bleaching processes. / Vuorinen, Tapani; Fagerström, Pirjo; Räsänen, Erkki et al.
ISWPC 9th International Symposium on Wood and Pulping Chemistry. Montreal: Canadian Pulp and Paper Association (CPPA), 1997. p. M4-1-M4-4.

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

TY - GEN

T1 - Selective hydrolysis of hexenuronic acid groups opens new possibilities for development of bleaching processes

AU - Vuorinen, Tapani

AU - Fagerström, Pirjo

AU - Räsänen, Erkki

AU - Vikkula, Anne

AU - Henricson, Kaj

AU - Teleman, Anita

PY - 1997

Y1 - 1997

N2 - Hexenuronic acid groups (HexA) in kraft pulps react with permanganate, chlorine, chlorine dioxide, ozone and peracids. HexA does not only increase bleaching chemical consumption in C-, D-, Z- and Paa-stages but is converted to products that are harmful in different aspects. A mild acid treatment hydrolyzes HexA strikingly selectively. Simultaneously the kappa number of a kraft pulp may decrease by several units. Only traces of other carbohydrate structures are dissolved. Cellulose is depolymerized to a limited extent but the selectivity of the treatment is still as high as in oxygen stage.

AB - Hexenuronic acid groups (HexA) in kraft pulps react with permanganate, chlorine, chlorine dioxide, ozone and peracids. HexA does not only increase bleaching chemical consumption in C-, D-, Z- and Paa-stages but is converted to products that are harmful in different aspects. A mild acid treatment hydrolyzes HexA strikingly selectively. Simultaneously the kappa number of a kraft pulp may decrease by several units. Only traces of other carbohydrate structures are dissolved. Cellulose is depolymerized to a limited extent but the selectivity of the treatment is still as high as in oxygen stage.

M3 - Conference article in proceedings

SN - 1-896742-14-9

SP - M4-1-M4-4

BT - ISWPC 9th International Symposium on Wood and Pulping Chemistry

PB - Canadian Pulp and Paper Association (CPPA)

CY - Montreal

T2 - ISWPC 9th International Symposium on Wood and Pulping Chemistry

Y2 - 9 June 1997 through 12 June 1997

ER -

Selective hydrolysis of hexenuronic acid groups opens new possibilities for development of bleaching processes

Abstract

Conference

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