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2017 Vol.49, Issue 4 Preview Page
Effect of Sodium Hydroxide and Magnesium Dihydroxide on Bleaching of Chemithermomechanical Pulp Made from Pinus densiflora

소나무로 제조된 화학열기계펄프의 표백 시 가성소다와 수산화마그네슘의 효과 연구

Ji-Young Lee
,
Chul-Hwan Kim†
,
Sol Kwon
,
Hyunghun Park
,
Min-Seok Lee
,
Hyun-Tek Yim
이지영
,
김철환 †
,
권솔
,
박형훈
,
이민석
,
임현택
Dept. of Env. Material Sci., IALS, Gyeonsang National University, Jinju, 52828
경상대학교 농업생명과학대학 환경산림과학부/임산공학과
†Corresponding author: E-Mail: jameskim@gnu.ac.kr
30 August 2017. pp. 41-48
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Abstract

The use of a new, technical Mg(OH)2-based bleaching additive was evaluated compared to a NaOH-based additve for peroxide bleaching of CTMP (chemithermomechanical pulp) made from domestic pine, Pinus densiflora. It is well known that NaOH-based bleaching system can cause the dissolution of low-molecular carbohydrates into the bleaching effluents and is responsible for the increased COD load and the formation of a significant amount of anionic trash. It was confirmed that, under the normal condition, the Mg(OH)2-based process generated a brightening effect closed to that of the conventional NaOHbased process at the same peroxide dosage. At a similar brightness level, the Mg(OH)2-based bleaching also produced less anionic trash, lower COD and less residual peroxide in the bleaching effluent. In conclusion, the change of caustic soda to Mg(OH)2 might well prove to be an efficient solution to bleach CTMP from softwood without sacrificing brightness and increasing effluent troubles.

Keywords
CTMP
peroxide bleaching
magnesium
Mg(OH)2
COD
anionic trash
References

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Information
  • Publisher :Korea Technical Association of The Pulp and Paper Industry
  • Publisher(Ko) :한국펄프종이공학회
  • Journal Title :Journal of Korea TAPPI
  • Journal Title(Ko) :펄프종이기술
  • Volume : 49
  • No :4
  • Pages :41-48
  • Received Date : 2017-08-02
  • Revised Date : 2017-08-16
  • Accepted Date : 2017-08-18
  • DOI :https://doi.org/10.7584/JKTAPPI.2017.08.49.4.41
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