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| Titel: |
Brightness Optimization of Ozone Pre-Treatment Followed by Peroxide Bleaching of TMP Pulp from Tamarack (Larix laricina) |
| Auteur: |
Robert, Sylvain Lamothe, Jean-Patrice Daneault, Claude |
| Verschenen in: |
Journal of wood chemistry and technology |
| Paginering: | Jaargang 10 (1990) nr. 2 pagina's 191-207 |
| Jaar: |
1990-06-01 |
| Inhoud: |
This study examines the influence of ozone on a TMP pulp of tamarack in an independent bleaching stage and as a pre-treatment for hydrogen peroxide bleaching. Ozone charges of up to 6% were used on dry pulp. The results were compared to those obtained with 1% H2O2 bleaching. Experiments were conducted at 23°C and 55°C, and pH varied from 3.5 to 10.5. The best bleaching results were reached with acidic pH, with interesting behavior observed at an alkaline pH level. Ozone effectively attacks CO groups in lignin, but lacks the chemical selectivity and high reactivity required to become a good bleaching agent. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 1 van 8 gevonden artikelen
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