Abstract
Soda birch pulps cooked to kappa numbers 35 and 50 were
delignified using oxygen and ozone. The following process
modifications were studied: 1) Medium kappa number (35)
soda cooking followed by oxygen/ozone delignification and
final bleaching: O-O-A/D-Eop-D-P and O-Z-D-Eop-D-P. 2)
High kappa number (50) soda cooking followed by
oxygen/ozone delignification and final bleaching:
O-Z-D-Eop-D-P and O-O-Z-D-Eop-D-P. The results showed
that stopping the soda cook at higher kappa number than
in traditional cooking and continuing the delignification
with oxygen and ozone would be a promising process
alternative to obtain paper grade pulp with adequate
properties and sulphur free lignin as a by-product.
| Original language | English |
|---|---|
| Title of host publication | IPBC 2014 Grenoble |
| Subtitle of host publication | International Pulp Bleaching Conference |
| Editors | Gopal C. Goyal, Christine Chirat |
| Place of Publication | Grenoble |
| Pages | 69-75 |
| Publication status | Published - 2014 |
| MoE publication type | B3 Non-refereed article in conference proceedings |
| Event | International pulp bleaching conference, IPBC 2014 - Grenoble, France Duration: 29 Oct 2014 → 31 Oct 2014 |
Conference
| Conference | International pulp bleaching conference, IPBC 2014 |
|---|---|
| Abbreviated title | IPBC 2014 |
| Country/Territory | France |
| City | Grenoble |
| Period | 29/10/14 → 31/10/14 |
Keywords
- oxygen delignification
- ozone
- sulphur free
- high kappa number
- birch