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Sequential Oxidative and Reductive Bleaching of MOW by the Addition of Thiourea  

김승호 (고려대학교 생명환경과학대학 생태공학부)
안병준 (임업연구원 임산공학부 화학미생물학과)
백기현 (고려대학교 생명환경과학대학 생태공학부)
Publication Information
Journal of Korea Technical Association of The Pulp and Paper Industry / v.34, no.3, 2002 , pp. 38-45 More about this Journal
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
MOW; oxidative and reductive bleaching; FAS; Thiourea; strength;
Citations & Related Records

Times Cited By SCOPUS : 1
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