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Temperature and effective alkali effect on brown pulp kraft cooking

  • Jaqueline Silveira Comelato Favaro , Gustavo Ventorim , Iliane Rodrigues de Oliveira ORCID logo EMAIL logo and Cláudia Rodrigues de Oliveira
Published/Copyright: April 10, 2021
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Abstract

One way to obtain high quality pulp production is to improve selectivity delignification of step, maximize yield. Brown pulp yield and chemical composition were studied, with variation of temperature and effective alkali in Kraft cooking. Considering that these variables directly affect lignin removal rate and final product quality. Industrial wood chips from Eucalyptus grandis x Eucalyptus urophylla hybrids were used in this study. The cooking was performed to obtain pulps with kappa number 13, 15 and 17 for temperatures 155 °C, 160 °C and 165 °C, using the same Factor H (695). Yields were analyzed according to: total yield, rejects content and screened pulp yield. Klason lignin content, wood and pulp sugars, levels of hexenuronic acids in pulp were also determined. Results indicate that lower cooking temperatures are beneficial in relation to cooking performance, selectivity and preservation of xylans. With a screened pulp yield of 57.1 % for KN 17 at the lowest temperature 155 ºC and 55.3 % at the same KN at 165 ºC. The lowest screened pulp yield obtained, 51 %, was for KN 13 at 165 ºC, with 54.1 % with the same KN at 155 ºC. Evidencing a decreasing linear trend of screened pulp yield with temperature increase and kappa number reduction.

Funding statement: The authors acknowledge Brazilian funding agencie CAPES (Coordinator for the Improvement of Higher Level Personnel) for scholarship to J. S. C. Favaro.

  1. Conflict of interest: The authors declare no conflict of interest.

References

Al-Dajani, W. W. The influence of residual lignin structure in the bleachability of alkaline pulps. (2001) Doctoral thesis. Royal Institute of Technology (KTH) Department of Pulp and Paper Chemistry and Technology, Stockholm/ Sweden.Search in Google Scholar

Almeida, F. S. (2003) Influência da carga alcalina no processo de polpação Lo-Solids® para madeiras de eucalipto. Master’s dissertation, Forest Resources, Escola Superior de Agricultura Luiz de Queiroz. Universidade de São Paulo, Piracicaba- SP/Brazil.Search in Google Scholar

Aurell, R., Hartler, N. (1965) Kraft pulping of pine. Part I. The changes in the composition of the wood residue during the cooking process. Sven Papperstidn. 68(1):59–68.Search in Google Scholar

Bassa, A. G. M. C., Silva Júnior, F. G., Sacon, V. M. (2007) Misturas de madeira de Eucalyptus Grandis x Eucalyptus Urophylla e Pinus Taeda para produção de celulose Kraft através do processo Lo-Solids. Scientia Forestalis. 75(1):19–29.10.11606/D.11.2007.tde-08032007-162226Search in Google Scholar

Buchert, J., Teleman, A., Harjunpää, V., Tenkanen, M., Viikari, V., Vuorinen, T. (1995) Effect of cooking and bleaching on the structure of xylan in conventional pine Kraft pulp. Tappi Journal. 78(11):125–130.Search in Google Scholar

Chai, X.-S., Luo, Q., Yoon, S.-H., Zhu, J. Y. (2001) The fate hexenuronic acid groups during Kraft pulping of hardwoods. Journal of Pulp and Paper Science. 27(12):403–406.Search in Google Scholar

Colodette, J. L., Gomide, J. L., Girard, R., Jääskeläinen, A.-S., Argyropoulos, D. S. (2002) Influence of pulping conditions on eucalyptus kraft pulp yield, quality, and bleachability. Tappi Journal. 1(1):14–20.Search in Google Scholar

Daniel, A. I. D., Pascoal Neto, C., Evtuguin, D. V., Silvestre, A. J. D. (2003) Hexenuronic acid contents of Eucalyptus Globulus Kraft pulps: variation with pulping conditions and effect on ECF bleachability. Tappi Journal. 2(5):3–8.Search in Google Scholar

Dias, R. L. V., Correa, S. A. C. (1980) Contribuição para o efeito de variáveis do cozimento em propriedades da polpa de Eucalyptus grandis. In: Proceedings, Cong. Anual da ABCP, 13, Associação Técnica Brasileira de Celulose e Papel, São Paulo, Brazil. pp. 5–18.Search in Google Scholar

Dryselius, E., Lindberg, B., Theander, O. (1958) Alkaline hydrolysis of glycosidic linkages. Acta Chemica Scandinavica. 12(2):340–342.10.3891/acta.chem.scand.12-0340Search in Google Scholar

Fardim, P., Duran, N. (2004) Retention of cellulose, xylan and lignin in Kraft pulping of Eucalyptus studied by multivariate data analysis: influences on physicochemical and mechanical properties of pulp. Journal of Brazilian Chemical Society. 15(4):514–522.10.1590/S0103-50532004000400012Search in Google Scholar

Favaro, J. S. C. (2015) Estudos da polpação Kraft, branqueamento e refino de Eucalyptus grandis x Eucalyptus urophylla. Doctoral Dissertation, Universidade Estadual Paulista, Faculdade de Engenharia de Guaratinguetá, Guaratinguetá-SP/Brazil.Search in Google Scholar

Foelkel, C. E. B., Brasil, M. A. M., Barrichelo, L. E. G. (1971) Métodos de determinação da densidade básica de cavacos para coníferas e folhosas. IPEF. 2(3):65–74.Search in Google Scholar

Genco, J. M., Medhora, H. K., Busayasakul, N., Robbins, W. (1989) Hemicellulose retention during Kraft pulping. In: Proceedings, TAPPI Pulping C, Westin Seattle, Seattle, Washington, D.C., USA. pp. 585–605.Search in Google Scholar

Gomide, J. L., Colodette, J. L. (1983) Avaliação estatística da otimização de parâmetros da polpação Kraft de eucalipto. In: Proceedings, Cellulose and Paper Latin American C, ABTCP, São Paulo, Brazil. pp. 317–327.Search in Google Scholar

Gustavsson, C. A.-S., Al-Dajani, W. W. (2000) The influence of cooking conditions on the degration of hexenuronic acid, xylan, glucomannan and cellulose during Kraft pulping for softwood. Nordic Pulp and Paper Research Journal. 15(2):160–167.10.3183/npprj-2000-15-02-p160-167Search in Google Scholar

Johansson, M. H., Samuelson, O. (1977) Epimerization and degradation of 2-O-(4-O-Methyl-Α-D-glucopyranosyluronic acid)-D-xylitol in alkaline medium. Carbohydrate Research. 54(2):295–299.10.1016/S0008-6215(00)84821-1Search in Google Scholar

Lennholm, H., Wallbäcks, L., Iversen, T. (1995) Solid-state high-resolution 13 C-NMR studies of regenerated cellulose samples with different crystallinities. Nord Pulp and Paper Research Journal. 10(1):46–50.10.3183/npprj-1995-10-01-p046-050Search in Google Scholar

Mokfienski, A., Colodette, J. L., Gomide, J. L., Carvalho, A. M. M. L. (2008) A importância relativa da densidade da madeira e do teor de carboidratos no rendimento de polpa e na qualidade do produto. Ciência Florestal. 18(3):401–413.10.5902/19805098451Search in Google Scholar

Monrroy, M., Valdebenito, M., Baeza, J., Mendonça, R., Freer, J. (2006) Effect of pulping conditions in uronic and hexenuronic acids concentration in Kraft pulps of Eucalyptus Globulus. In: Proceedings, International Cellulose and Paper Exhibition and Congress, ABTCP-TAPPI, São Paulo, Brasil, Cd-Room.Search in Google Scholar

Pascoal Neto, C. P., Daniel, A. I. D., Evtuguin, D., Silvestre, A. J. (2000) Influence of kappa number of unbleached pulp on ECF bleachability of eucalyptus globulus Kraft pulps. In: Proceedings, International Pulp Bleaching Conference, Halifx, Canada.Search in Google Scholar

Pedrazzi, C., Colodette, J. L., Oliveira, R. C., Muguet, M. C. S., Gomide, J. L. (2010) Avaliação das propriedades físico-mecânicas de polpas produzidas por novas sequências de branqueamento. Ciência Florestal. 20(1):123–135.10.5902/198050981766Search in Google Scholar

Ragauskas, A. J., Lin, W., Mcdonough, T. J., Jiang, J. E. (1999) NMR studies. Part 5: nature of residual lignin in Kraft pulps. Tappi journal. 82(9):113–116.Search in Google Scholar

Rahmati, H., Navaee-Ardeh, S., Aminian, H. (2007) Influence of sulfidity and active alkali charge on the properties from Eucalyptus camaldulensis. Journal of Plant Sciences. 2(6):600–606.10.3923/jps.2007.600.606Search in Google Scholar

Santiago, A. S., Pascoal Neto, C. (2008) Eucalyptus globulus Kraft process modifications: effect on pulping and bleaching performance and papermaking properties of bleached pulps. Journal of Chemical Technology and Biotechnology. 83(9):1298–1305.10.1002/jctb.1947Search in Google Scholar

Sixta, H. Handbook of pulp. Wiley-VCH Verlag, Weinheim, Germany, 2006. pp. 1316.10.1002/9783527619887Search in Google Scholar

Sjöström, E. Wood chemistry: fundamentals and applications. Elsevier, San Diego, USA, 1993. pp. 289.Search in Google Scholar

Tran, A. V. (2002) Effect of cooking temperature on Kraft pulping of hardwood. TAPPI Jounal. 1(4):13–19.Search in Google Scholar

Ventorim, G., Caraschi, J. C., Colodette, J. L., Gomide, J. L. (2009) A Influência dos ácidos hexenurônicos no rendimento e na branqueabilidade da polpa Kraft. Química Nova. 32(2):373–377.10.1590/S0100-40422009000200019Search in Google Scholar

Vuorinen, T., Burchert, J., Teleman, A., Tenkanen, M., Fagerstrom, P. (1996) Selective hydrolysis of hexenuronic acid groups and its application in ECF and TCF bleaching of Kraft pulps. In: Proceedings, International Pulp Bleaching C, Washington, D.C, USA. pp. 43–51.Search in Google Scholar

Received: 2020-09-29
Accepted: 2021-03-31
Published Online: 2021-04-10
Published in Print: 2021-06-25

© 2021 Walter de Gruyter GmbH, Berlin/Boston

Articles in the same Issue

  1. Frontmatter
  2. Review
  3. Aspects on bond strength in sheet structures from TMP and CTMP – a review
  4. Chemical pulping
  5. The impact of using different wood qualities and wood species on chips produced using a novel type of pilot drum chipper
  6. Temperature and effective alkali effect on brown pulp kraft cooking
  7. Mechanical pulping
  8. On the modeling of pulp properties in CTMP processes
  9. Paper technology
  10. Pulp pumping efficiency I – A critical review on loss and its estimation
  11. Pulp pumping efficiency II – Designing of a pulp pump
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  19. Fabrication of rosemary essential oil microcapsules and using in active packaging
  20. Packaging
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  22. Recycling
  23. Wet route pellets production using primary sludge from kraft pulp mill
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