Journal of Korea Technical Association of The Pulp and Paper Industry (펄프종이기술)

Korea Technical Association of the Pulp and Paper Industry (한국펄프종이공학회)
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Sequential Oxidative and Reductive Bleaching of MOW by the Addition of Thiourea

Thiourea 첨가에 의한 MOW의 산화-환원 연속 표백

  • 김승호 (고려대학교 생명환경과학대학 생태공학부) ;
  • 안병준 (임업연구원 임산공학부 화학미생물학과) ;
  • 백기현 (고려대학교 생명환경과학대학 생태공학부)
  • Published : 2002.10.01
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Abstract

The effect of sequential oxidative-reductive bleaching on brightening of the MOWs is investigated. The improvement in brightnesses of MOWs is more effective in conventional PFAS bleaching than in P/T bleaching. There is no difference in the mechanical properties or the bleached pulps between PFAS and P/T sequences. Considering the brightness gains and bleaching chemicals cost, for the MOW A(Initial brightness: 68.3% ISO) containing 5％ ONP and 20% colored paper, the P/T bleaching is more economical than the PFAS bleaching. However for MOW B(initial brightness: 59.1％ ISO) containing 15% ONP and 35％ colored paper, there is no difference in the bleaching efficiency between PFAS and P/T bleaching.

Keywords

References

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