High-purity pulp from paper-grade pulp by enzymatic treatment and post-extraction in caustic-borate solution

Terhi Toivari; Lidia Testova; Marc Borrega; Herbert Sixta

High-purity pulp from paper-grade pulp by enzymatic treatment and post-extraction in caustic-borate solution

Terhi Toivari, Lidia Testova, Marc Borrega, Herbert Sixta

Not published at VTT

Aalto University

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

Abstract

High-purity cellulosic pulps with cellulose contents above 98% were produced from bleached softwood paper-grade pulp by applying an enzymatic treatment followed by caustic-borate extraction. In acetylation experiments, the extracted pulp samples having the lowest amounts of residual hemicelluloses resulted in very low yellowness, even as low as 0.18. However, those samples also showed a low transmittance of the triacetate dope, which is undesirable as regards the production of an acetate-grade pulp. This decrease in transmittance is believed to be due to the formation of Cellulose II and its hornification upon removing the water from the pulp.

Original language	English
Title of host publication	NWBC 2015
Subtitle of host publication	6th Nordic Wood Biorefinery Conference
Editors	Eemeli Hytönen
Place of Publication	Espoo
Publisher	VTT Technical Research Centre of Finland
Pages	377-382
ISBN (Electronic)	978-951-38-8353-9
ISBN (Print)	978-951-38-8352-2
Publication status	Published - 2015
MoE publication type	A4 Article in a conference publication
Event	6th Nordic Wood Biorefinery Conference, NWBC 2015 - Helsinki, Finland Duration: 20 Oct 2015 → 22 Oct 2015

Publication series

Series	VTT Technology
Number	233
ISSN	2242-1211

Conference

Conference	6th Nordic Wood Biorefinery Conference, NWBC 2015
Abbreviated title	NWBC 2015
Country/Territory	Finland
City	Helsinki
Period	20/10/15 → 22/10/15

Access to Document

https://publications.vtt.fi/pdf/technology/2015/T233.pdf

Cite this

@inproceedings{c220c48f05ed4ab888b5d5417cb1673f,

title = "High-purity pulp from paper-grade pulp by enzymatic treatment and post-extraction in caustic-borate solution",

abstract = "High-purity cellulosic pulps with cellulose contents above 98% were produced from bleached softwood paper-grade pulp by applying an enzymatic treatment followed by caustic-borate extraction. In acetylation experiments, the extracted pulp samples having the lowest amounts of residual hemicelluloses resulted in very low yellowness, even as low as 0.18. However, those samples also showed a low transmittance of the triacetate dope, which is undesirable as regards the production of an acetate-grade pulp. This decrease in transmittance is believed to be due to the formation of Cellulose II and its hornification upon removing the water from the pulp.",

author = "Terhi Toivari and Lidia Testova and Marc Borrega and Herbert Sixta",

note = "Funding Information: Many thanks to Yawei Wang and Hairong Xiong (Engineering Research Centre of Bioresources in Southern China, South-central University for Nationalities) and Ossi Turunen (Department of Biotechnology and Chemical Technology, Aalto University) for providing the thermomannanase used in the enzymatic stage. Special thanks to Annariikka Roselli for all the help with the practical issues regarding the enzymatic treatments. This study has been funded by WoodWisdom Network, Tekes, Andritz, Mets{\"a}Fibre, and StoraEnso. Publisher Copyright: {\textcopyright} VTT 2015. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.; 6th Nordic Wood Biorefinery Conference, NWBC 2015, NWBC 2015 ; Conference date: 20-10-2015 Through 22-10-2015",

year = "2015",

language = "English",

isbn = "978-951-38-8352-2",

series = "VTT Technology",

publisher = "VTT Technical Research Centre of Finland",

number = "233",

pages = "377--382",

editor = "Eemeli Hyt{\"o}nen",

booktitle = "NWBC 2015",

address = "Finland",

}

Toivari, T, Testova, L, Borrega, M & Sixta, H 2015, High-purity pulp from paper-grade pulp by enzymatic treatment and post-extraction in caustic-borate solution. in E Hytönen (ed.), NWBC 2015: 6th Nordic Wood Biorefinery Conference. VTT Technical Research Centre of Finland, Espoo, VTT Technology, no. 233, pp. 377-382, 6th Nordic Wood Biorefinery Conference, NWBC 2015, Helsinki, Finland, 20/10/15. <https://publications.vtt.fi/pdf/technology/2015/T233.pdf>

High-purity pulp from paper-grade pulp by enzymatic treatment and post-extraction in caustic-borate solution. / Toivari, Terhi; Testova, Lidia; Borrega, Marc et al.
NWBC 2015: 6th Nordic Wood Biorefinery Conference. ed. / Eemeli Hytönen. Espoo: VTT Technical Research Centre of Finland, 2015. p. 377-382 (VTT Technology; No. 233).

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

TY - GEN

T1 - High-purity pulp from paper-grade pulp by enzymatic treatment and post-extraction in caustic-borate solution

AU - Toivari, Terhi

AU - Testova, Lidia

AU - Borrega, Marc

AU - Sixta, Herbert

N1 - Funding Information: Many thanks to Yawei Wang and Hairong Xiong (Engineering Research Centre of Bioresources in Southern China, South-central University for Nationalities) and Ossi Turunen (Department of Biotechnology and Chemical Technology, Aalto University) for providing the thermomannanase used in the enzymatic stage. Special thanks to Annariikka Roselli for all the help with the practical issues regarding the enzymatic treatments. This study has been funded by WoodWisdom Network, Tekes, Andritz, MetsäFibre, and StoraEnso. Publisher Copyright: © VTT 2015. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.

PY - 2015

Y1 - 2015

N2 - High-purity cellulosic pulps with cellulose contents above 98% were produced from bleached softwood paper-grade pulp by applying an enzymatic treatment followed by caustic-borate extraction. In acetylation experiments, the extracted pulp samples having the lowest amounts of residual hemicelluloses resulted in very low yellowness, even as low as 0.18. However, those samples also showed a low transmittance of the triacetate dope, which is undesirable as regards the production of an acetate-grade pulp. This decrease in transmittance is believed to be due to the formation of Cellulose II and its hornification upon removing the water from the pulp.

AB - High-purity cellulosic pulps with cellulose contents above 98% were produced from bleached softwood paper-grade pulp by applying an enzymatic treatment followed by caustic-borate extraction. In acetylation experiments, the extracted pulp samples having the lowest amounts of residual hemicelluloses resulted in very low yellowness, even as low as 0.18. However, those samples also showed a low transmittance of the triacetate dope, which is undesirable as regards the production of an acetate-grade pulp. This decrease in transmittance is believed to be due to the formation of Cellulose II and its hornification upon removing the water from the pulp.

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M3 - Conference article in proceedings

AN - SCOPUS:85088273243

SN - 978-951-38-8352-2

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BT - NWBC 2015

A2 - Hytönen, Eemeli

PB - VTT Technical Research Centre of Finland

CY - Espoo

T2 - 6th Nordic Wood Biorefinery Conference, NWBC 2015

Y2 - 20 October 2015 through 22 October 2015

ER -

High-purity pulp from paper-grade pulp by enzymatic treatment and post-extraction in caustic-borate solution

Abstract

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NWBC 2015: The 6th Nordic Wood Biorefinery Conference

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