Journal of the Korean Wood Science and Technology

The Korean Society of Wood Science & Technology (한국목재공학회)
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Effect of Sugarcane Bagasse Soda-AQ Pulp Bleaching Properties by Type of Chelate Compounds and Simultaneous Process of (DQ) Stage

이산화염소 표백단계와 킬레이트 처리단계 동시 진행 시 킬레이트 종류가 사탕수수 Soda-AQ 펄프 표백에 미치는 영향

  • Lee, Jai-Sung (Department of Wood and Paper Science, College of Agriculture, Life & Environments Sciences, Chungbuk National University) ;
  • Shin, Soo-Jeong (Department of Wood and Paper Science, College of Agriculture, Life & Environments Sciences, Chungbuk National University)
  • 이재성 (충북대학교 농업생명환경대학 목재종이과학과) ;
  • 신수정 (충북대학교 농업생명환경대학 목재종이과학과)
  • Received : 2015.11.27
  • Accepted : 2015.12.30
  • Published : 2016.01.25
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Abstract

Pulp made from sugarcane bagasse (SCB) was bleached in element chlorine free (ECF) sequence. The peroxide bleaching process for the final bleaching process has been introduced in order to reduce the use of chlorine dioxide. Prior to peroxide bleaching, different chelating chemicals were applied. When 4.5% of the total chlorine dioxide was used, bleached SCB pulp using additional DTPA chelate stage (DEDQP) resulted in 87.0% of the ISO brightness. However, bleached pulp using simultaneous stage of DTPA chelate and chlorine dioxide (DE(DQ)P) was reached at 83.9% of the ISO brightness. The viscosity of DEDQP bleached pulp was 25.6 cPs, and the one of DE(DQ)P bleached pulp was 21.9 cPs. Decreasing of chelate effect by chlorine dioxide led to a decrease in the final brightness and a lower viscosity. But simultaneous stage of EDTA chelate and chlorine dioxide (DE(DQ)P) led to higher final brightness (87.0% ISO) and higher viscosity (25.8 cPs) than those of the $DEDQ_{EDTA}P$ bleached pulp (86.4% ISO, 25.2 cPs).

본 연구는 사탕수수 부산물 펄프를 Element Chlorine Free (ECF) 표백 처리할 때 마지막 과산화수소 표백단계를 추가하여 최종 표백 펄프의 잔류 이산화염소를 제거하고, 총 이산화염소 사용량을 제거하고자 하였다. 특히 과산화수소 표백단계를 효과적으로 사용하기 위한 킬레이트 처리 단계를 반응 조건이 비슷한 이산화염소 표백 단계와 동시 진행하였을 때, 개별적으로 킬레이트 처리를 진행한 표백 펄프의 표백 특성을 비교하였다. 총 이산화염소 사용량이 4.5%(w/w oven dried pulp)일 때 EDTA의 경우 킬레이트를 동시 처리할 때 백색도와 점도는 각각 87.0% ISO와 25.8 cPs로 개별 처리하는 경우 보다 더 높은 표백 특성(86.4% ISO, 25.2 cPs)을 나타냈다. 반면 DTPA를 킬레이트 화합물로 사용하는 경우 동시처리 시(83.9% ISO, 21.9 cPs) 개별처리(86.8% ISO, 25.6 cPs) 보다 표백 특성이 낮은 수준을 나타냈다. 특히 EDTA를 킬레이트 화합물로 사용시 잔류 전이금속(망간 이온, 철 이온) 농도가 개별처리 시 0.65 ppm, 66.74 ppm으로 나타난 반면 동시 처리시 0.52 ppm과 55.68 ppm으로 킬레이트 처리 효과가 향상됨을 확인할 수 있다. DTPA는 동시 처리시 0.71 ppm과 116.88 ppm의 망간 이온, 철 이온 농도가 나타난 반면 개별 처리시 0.56 ppm, 86.17 ppm의 농도로 동시 처리 시 킬레이트 처리 능력이 감소됨을 알 수 있다. 이를 통해 킬레이트 화합물 종류와 처리 방법에 따라 킬레이트 효과의 차이가 나타나며, 효율적인 공정을 위해서는 EDTA를 킬레이트 화합물로 이산화염소 표백단계와 동시 처리하는 것이 표백 효율과 공정효율을 위해 유리한 것으로 나타났다.

Keywords

References

  1. Abrantes, S., Amaral, E., Costa, P., Shatalov, A., Duarte, P. 2007. Hydrogen peroxide bleaching of Arundo donax L. kraft-anthraquinone pulp - effect of a chelating stage. Industrial Crops and Products 25: 288-293. https://doi.org/10.1016/j.indcrop.2006.12.006
  2. Ahn, C.-D., Seo, J.-H., Kim, H.-J., Chung, S.-H. 2014. Evaluation of brightness and environmental load by hydrogen peroxide bleaching conditions of TMP. Jounal of Korea TAPPI 46(3): 20-27.
  3. Axegard, P., Renberg, L. 1989. The influence of bleaching chemicals and lignin content on the formation of polychlorinated dioxins and dibenzofurans. Chemosphere 19: 661-668. https://doi.org/10.1016/0045-6535(89)90387-1
  4. Basta, J., Holtinger, L., Hook, J. 1991. Controlling the profile of metals in the pulp before hydrogen peroxide treatment. Proceedings of 6th International Symposium on Wood and Pulping Chemistry Vol 1: 237-244.
  5. Carvalho, M.G.V.S., Carvalho, N.M.V., Loureiro, P.E.G. 2008. Performance of a final hydrogen peroxide stage in the ECF bleaching of Eucalyptus D0E0PD1 kraft pulps. Tappi Journal 7: 8-13.
  6. Kim, J.-K., Choi, K.-H., Lee, M.-K. 2014. Permanent characteristics of the handsheet mixed with hemp bast fiber. Journal of Korea TAPPI 46(6): 71-77.
  7. Kim, J.-K., Choi, K.-H., Seo, J.-H., Lee, M.-K. 2015. Bleachability of hemp bast fiber by chlorine dioxide. Journal of Korea TAPPI 47(4): 109-114.
  8. Kim, S.-J., Yoon, B.-H. 2006. Catalytic decomposition of hydrogen peroxide by transition metal ions. Journal of Korea TAPPI 38(3): 79-84.
  9. Lee, M.-W., Lee, Y.-H., Jung, J.-K., Seo, Y.-B. 2014. Application of in-situ $CaCO_{3}$ formation method for better utilization of recycled fibers (2) - comparison with $CaCO_{3}$ addition method and effects of temperature -. Journal of Korea TAPPI 46(5): 27-34.
  10. Lee, J.-S., Shin, S.-J. 2015. Chlorine dioxide bleaching properties of sugarcane bagasse pulp and oil palm trunk pulp. Journal of Korea TAPPI 47(4): 13-20.
  11. Lee, J.-S., Song, W.-Y., Park, J.-M., Shin, S.-J. 2015. Effect on bleaching efficiency by chelating treatment in sugarcane bagasse DEDP bleaching process. Journal of Korea TAPPI 47(4): 80-86.
  12. Marcon, J., Mortha, G., Marling, N., Molton, F., Duboc, C., Brunet, A., Petit-Conil, M. 2015. Investigations on the decomposition mechanism of chlorine dioxide at alkaline pH, 2015 Proceedings of 18th International Symposium on Wood. Fiber and Pulping Chemistry: 280-283.
  13. Seco, I.M.C., Neto, C.P., Silvestre, A.J.D. 2008. Strategies to reduce the brightness reversion of industrial ECF bleached Eucalyptus globulous kraft pulp. Journal of Chemical Technology and Biotechnology 83: 218-226. https://doi.org/10.1002/jctb.1791
  14. Toven, K., Gellerstedt, G., Kleppe, P., Moe, S. 2002. Use of chlorine dioxide and ozone in combination in prebleaching. Journal of Pulp and Paper Science 28(9): 305-310.
  15. Yoon, B.-H., Kim, S.-J., Choi, K.-H., Kim, Y.-H. 2003. Interaction of oxygen and chlorine dioxide in pulp bleaching (1) -Studies on the degradation of lignin model compounds-. Journal of Korea TAPPI 36(1): 37-42.
  16. Yoon, B.-H., Kim, S.-J., Choi, K.-H., Kim, Y.-H. 2004. Interaction of oxygen and chlorine dioxide in pulp bleaching (II) - Studies on the degradation of carbohydrates-. Journal of Korea TAPPI 36(1): 37-42.