Non-chlorine bleaching alternatives: a comparison between ozone and sodium hypochlorite bleaching of dyed paper

摘要

The objective of this study was to determine the effectiveness of ozone as a bleaching agent for dyed paper. The paper industry has typically used sodium or calcium hypochlorite to bleach dyed paper. However, due to increasingly stringent environmetnal regulations, the paper industry has investigated and established the commercial viability of non-chlorine bleaching alternatives such as ozone. Therefore, Bayer corporation, in conjunction with quantum Technologie,s conducted a medium consistency ozone bleaching study to compare the effectiveness of ozone bleaching study to compare the effectiveness of ozone veruss sodium hypochlorite as a paper decolorizing agent. Internally dyed paper, produced under alkaline dyeing conditions, was treated with 1.5