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Effect of Optical Brightening Agent (OBA) on Bleaching Process on Paper of Eucalyptus Kraft Pulp

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DOI: 10.4236/nr.2013.45046    6,407 Downloads   9,241 Views  

ABSTRACT

In integrated factories of pulp and paper, the bleaching control is made by kappa number and/or brightness. However, the product paper is evaluated and valued for its whiteness. The level of final brightness of pulp certainly affects the demand for optical brighteners in paper manufacturing, nevertheless, there is not a direct correlation between consumption of optical brightener and final brightness, being the method of bleaching pulp, especially from the final stage of bleaching, also important in relation to this demand. Therefore, this study aimed to evaluate the potential of using the parameter whiteness as a tool to control bleaching pulp, instead of the traditional brightness and evaluate the impacts of different methods of bleaching and the pulp final brightness level in action of optical brighteners, to improve their performance. It was observed that the whiteness and brightness of the pulp are highly correlated and that the control of the bleaching plant can be done by any one of these two parameters. It was also concluded that, considering current prices of bleaching reagents and of optical brighteners, it is better to bleach the pulp up to lower brightness values (e.g. 88% ISO) and use larger amounts of optical brighteners to brighten the mass until the whiteness of 130 CIE. This conclusion is valid for whiteness measured before the size press. Further studies are needed to validate this conclusion considering the finished product.

Conflicts of Interest

The authors declare no conflicts of interest.

Cite this paper

B. Barbosa, F. Gomes, J. Colodette, D. Carvalho and M. Manfredi, "Effect of Optical Brightening Agent (OBA) on Bleaching Process on Paper of Eucalyptus Kraft Pulp," Natural Resources, Vol. 4 No. 5, 2013, pp. 378-382. doi: 10.4236/nr.2013.45046.

References

[1] K. M. M. Eiras and J. L. Colodette, “Investigation of Eucalyptus Kraft Pulp Brightness Stability,” Journal of Pulp and Paper Science, Vol. 31, No. 1, 2005, pp. 13-18.
[2] J. A. García Hortal, “Fibras Papeleras,” Edicions PC, Barcelona, 2007, 243 p.
[3] G. Gellerstedt and J. Li, “An HPLC Method for the Quantitative Determination of Hexeneuronic Acid Groups in Chemical Pulps,” Carbohydrate Research, Vol. 294, 1996, pp. 41-51.
[4] J. H. Gullichsen, et al., “Hannu Forest Products Chemistry,” Tappi, Espoo, 2000.
[5] L. Neimo, “Papermaking Science and Technology,” Papermaking Chemistry, Book 4, Fapet Oy, Helsinki, 1999.
[6] M. Scheringer, D. Halder and K. Hungerbühler, “Comparing the Environmental Performance of Fluorescent Whitening Agents with Peroxide Bleaching of Mechanical Pulp,” Journal of Industrial Ecology, Vol. 3, No. 4, 1999, pp. 77-95. doi:10.1162/108819899569575
[7] “Tappi Standard Procedures,” Tappi Press, Atlanta, 2012.
[8] T. Vuorinen, J. Buchert, A. Teleman, M. Tenkanen and P. Fagerstrom, “Selective Hydrolysis of Hexenuronic Acid Groups and Its Application in ECF and TCF Bleaching of Kraft Pulps,” International Pulp Bleaching Conference, Tappi Press, Atlanta, 1996, p. 43.
[9] H. Zhang, Z. He, Y. Ni, H. Hu and Y. Zhou, “Effectiveness of Optical Brightening Agent (OBA) on High Yield Pulps (HYP),” Proceedings of 93rd PAPTAC Annual Meeting, 20 February 2007, Montreal, pp. 235-240.
[10] B. W. Crouse and G. H. Snow, “Fluorescent Whitening Agent in the Paper Industry: Their Chemistry and Measurement,” Tappi Journal, Vol. 64, No. 7, 1981, pp. 87-89.
[11] H. Zhang, H. Hu, Z. He, Y. Ni and Y. Zhou, “Retention of Optical Brightening Agents (OBA) and Their Brightening Efficiency on HYP-Containing Paper Sheets,” Journal of Wood Chemistry and Technology, Vol. 27, No. 3-4, 2007, pp.153-167. doi:10.1080/02773810701700802

  
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