Final chlorine dioxide stage at near-neutral pH for bleaching eucalypt pulp
AUTOR(ES)
Ribeiro, Robisnéa A., Gomes, Fernando J. B., Floriani, José N., Damásio, Renato A. P., Demuner, Iara F., Colodette, Jorge L.
FONTE
Quím. Nova
DATA DE PUBLICAÇÃO
2014
RESUMO
It is well known that pH is an important parameter for controlling the eucalyptus pulp bleaching when using the final chlorine dioxide stage, since it affects the effectiveness of the process. Recommendations found in the literature for operating are in the 3.5 to 4.0 range. However, in this paper it was shown that final chlorine dioxide has better performance, with significant brightness gain while also preserving pulp quality, when it is operated at near neutral pH. This result can be explained by the generation of sodium bicarbonate in situ upon adding carbon dioxide at this stage.
Documentos Relacionados
- Environmentally induced cracking of API grade steel in near-neutral pH soil
- Facultative alkaliphiles lack fatty acid desaturase activity and lose the ability to grow at near-neutral pH when supplemented with an unsaturated fatty acid.
- Inactivation of Escherichia coli by Photochemical Reaction of Ferrioxalate at Slightly Acidic and Near-Neutral pHs
- The Avian Retrovirus Avian Sarcoma/Leukosis Virus Subtype A Reaches the Lipid Mixing Stage of Fusion at Neutral pH
- Activation of S1 nuclease at neutral pH.