Proposed mechanism of the enzymatic bleaching of kraft pulp with xylanases

Anne Kantelinen, Bo Hortling, Jorma Sundquist, Matti Linko, Liisa Viikari (Corresponding Author)

Research output: Contribution to journalArticleScientificpeer-review

151 Citations (Scopus)

Abstract

The modification of fibre surface by an enzymatic pretreatment was studied by analyzing the hydrolysis products released from the pulps and the molar mass distribution of the alkali-extracted residual lignin. In kraft pulp, the reprecipitated or readsorbed alkali-resistant xylan appears to form a physical barrier to the extraction of residual lignin from the fibres. The treatment of kraft pulp with hemicellulases removes some of this xylan and renders the fibre structure more- permeable. The increased permeability allows the passage of lignin or lignin-carbohydrate molecules in higher amounts and of higher molecular masses in the subsequent chemical extraction. The improved extractability of lignin leads to higher brightness of pulp, or can alternatively be exploited to reduce the consumption of bleaching chemicals.
Original languageEnglish
Pages (from-to)318 - 324
Number of pages7
JournalHolzforschung
Volume47
Issue number4
DOIs
Publication statusPublished - 1993
MoE publication typeA1 Journal article-refereed

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Kraft pulp
Lignin
Bleaching
Xylans
Alkalies
Pulp
Fibers
Molar mass
Molecular mass
Carbohydrates
Luminance
Hydrolysis
Molecules

Cite this

Kantelinen, A., Hortling, B., Sundquist, J., Linko, M., & Viikari, L. (1993). Proposed mechanism of the enzymatic bleaching of kraft pulp with xylanases. Holzforschung, 47(4), 318 - 324. https://doi.org/10.1515/hfsg.1993.47.4.318
Kantelinen, Anne ; Hortling, Bo ; Sundquist, Jorma ; Linko, Matti ; Viikari, Liisa. / Proposed mechanism of the enzymatic bleaching of kraft pulp with xylanases. In: Holzforschung. 1993 ; Vol. 47, No. 4. pp. 318 - 324.
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Kantelinen, A, Hortling, B, Sundquist, J, Linko, M & Viikari, L 1993, 'Proposed mechanism of the enzymatic bleaching of kraft pulp with xylanases', Holzforschung, vol. 47, no. 4, pp. 318 - 324. https://doi.org/10.1515/hfsg.1993.47.4.318

Proposed mechanism of the enzymatic bleaching of kraft pulp with xylanases. / Kantelinen, Anne; Hortling, Bo; Sundquist, Jorma; Linko, Matti; Viikari, Liisa (Corresponding Author).

In: Holzforschung, Vol. 47, No. 4, 1993, p. 318 - 324.

Research output: Contribution to journalArticleScientificpeer-review

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T1 - Proposed mechanism of the enzymatic bleaching of kraft pulp with xylanases

AU - Kantelinen, Anne

AU - Hortling, Bo

AU - Sundquist, Jorma

AU - Linko, Matti

AU - Viikari, Liisa

N1 - Project code: BIO2022

PY - 1993

Y1 - 1993

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AB - The modification of fibre surface by an enzymatic pretreatment was studied by analyzing the hydrolysis products released from the pulps and the molar mass distribution of the alkali-extracted residual lignin. In kraft pulp, the reprecipitated or readsorbed alkali-resistant xylan appears to form a physical barrier to the extraction of residual lignin from the fibres. The treatment of kraft pulp with hemicellulases removes some of this xylan and renders the fibre structure more- permeable. The increased permeability allows the passage of lignin or lignin-carbohydrate molecules in higher amounts and of higher molecular masses in the subsequent chemical extraction. The improved extractability of lignin leads to higher brightness of pulp, or can alternatively be exploited to reduce the consumption of bleaching chemicals.

U2 - 10.1515/hfsg.1993.47.4.318

DO - 10.1515/hfsg.1993.47.4.318

M3 - Article

VL - 47

SP - 318

EP - 324

JO - Holzforschung

JF - Holzforschung

SN - 0018-3830

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ER -