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- W2300404832 abstract "Previous results have shown that for peroxide bleaching of mechanical pulps the sodium borohydride assisted peroxide bleaching process (the so-called PR process) improves its bleaching efficiency and increases the brightness ceiling of mechanical pulps. The mechanism involved in the improvement of the PR process over the conventional peroxide bleaching process was studied in this paper. It was proposed that the improvement of the PR process derives from (1) deacetylation, (2) stabilisation of transition metals, and (3) suppressed alkaline darkening. Deacetylation decreases the in situ formation of peracetic acid and as a result, increases peroxide stability and reduces darkening reactions. Also, reduction of transition metals and the carbonyl groups of lignin by borohydride lead to better peroxide stability and suppress Dakin and Dakin-like reactions during peroxide bleaching." @default.
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- W2300404832 date "2005-01-01" @default.
- W2300404832 modified "2023-09-27" @default.
- W2300404832 title "Further Understanding of Sodium Borohydride Assisted Peroxide Bleaching of Mechanical Pulps (the P R Process)" @default.
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