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Deoxylapachol in Tectona grandis wood as a catalyst for delignification and carbohydrate protection during the kraft cooking of eucalyptus wood

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A Correction to this article was published on 25 February 2023

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Abstract

Kraft cooking is the predominant technology in the pulp and paper industry. However, it is necessary to improve its efficiency and yield. The use of catalysts in kraft cooking increases pulp yield, reduces lignin content in pulp fibers, and energy consumption. In this study, natural 2-methylanthraquinone (2-MAQ) and deoxylapachol were isolated from the acetone extracts of Indonesian Jepara Tectona grandis (teak) wood using column chromatography and used as catalysts in alkaline cooking. Gas chromatography–mass spectrometry revealed that the extract contained deoxylapachol, iso-deoxylapachol, and 2-MAQ. The Indonesian Gunung Kidul teak wood extract also contained lapachol. The kraft cooking time profile of Eucalyptus globulus wood at 145 ºC and charged with 17% active alkali demonstrated the ability of deoxylapachol to enhance the delignification rate and retain carbohydrates. The lignin content in the kraft-deoxylapachol cooking pulp was determined to be lower than that of the control pulp prepared without catalyst. The molecular weights determined for dissolved lignin in black liquor revealed that the addition of deoxylapachol accelerated lignin decomposition; meanwhile, 86% of the carbohydrates were retained at the end of the kraft-deoxylapachol cooking process. An approximately 0.8–1.2% higher pulp yield was obtained when deoxylapachol was added compared to that obtained in the absence of the catalyst. This study showed that natural deoxylapachol from teak wood can be a promising cooking catalyst for the pulp and paper industry and potentially offers a beneficial impact on society and the environment.

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Acknowledgments

Esty Octiana Sari is grateful to the Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan for providing the scholarship to conduct the current research under the MEXT Special Scholarship Program on Trans-world Professional Human Resources Management (TPHRD) for Doctoral Course. Yulia Anita is thankful to the Indonesia Endowment Fund for Education (LPDP) for the scholarship.

Funding

This study was supported by a scholarship from Mitsubishi Gas Chemical, Tokyo, Japan, for the promotion of science (RDE02044) and a scholarship from University of Tsukuba for the promotion of education and research in pulp and paper technology school, University of Riau [Based on Memorandum of Agreement for Academic Exchanges and Cooperation between University of Riau, Republic of Indonesia and University of Tsukuba, Japan-signed on 17th October 2019].

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The authors YA and HO contributed to the study conception and design. Data collection was performed by YA and EOS. Data analysis was performed by YA. Data curation was performed by HO. The first draft of the manuscript was written by EOS. The manuscript was reviewed by EOS, AN, and EE. The manuscript review was written by YA and HO. The review was edited by YA, EOS, and HO. This study was supervised by AN, EE and HO.

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Correspondence to Akiko Nakagawa-izumi.

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The authors have no relevant financial or non-financial interests to disclose.

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The original online version of this article was revised: Co-author name “Evelyn” is updated.

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Anita, Y., Sari, E.O., Nakagawa-izumi, A. et al. Deoxylapachol in Tectona grandis wood as a catalyst for delignification and carbohydrate protection during the kraft cooking of eucalyptus wood. Cellulose 30, 3363–3375 (2023). https://doi.org/10.1007/s10570-023-05063-5

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  • DOI: https://doi.org/10.1007/s10570-023-05063-5

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