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

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-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 languageEnglish
Title of host publicationNWBC 2015
Subtitle of host publication6th Nordic Wood Biorefinery Conference
EditorsEemeli Hytönen
Place of PublicationEspoo
PublisherVTT Technical Research Centre of Finland
Pages377-382
ISBN (Electronic)978-951-38-8353-9
ISBN (Print)978-951-38-8352-2
Publication statusPublished - 2015
MoE publication typeA4 Article in a conference publication
Event6th Nordic Wood Biorefinery Conference, NWBC 2015 - Helsinki, Finland
Duration: 20 Oct 201522 Oct 2015

Publication series

SeriesVTT Technology
Number233
ISSN2242-1211

Conference

Conference6th Nordic Wood Biorefinery Conference, NWBC 2015
Abbreviated titleNWBC 2015
CountryFinland
CityHelsinki
Period20/10/1522/10/15

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