The effects of washing in DD and DP final bleaching | |
| Author | Sun, Wenbing |
| Call Number | AIT Thesis no.PP-06-8 |
| Subject(s) | Kraft paper Papermaking--Chemistry |
| Note | A thesis submitted in pa1tial fulfillment of the requirements for the degree of Master of Engineering |
| Publisher | Asian Institute of Technology |
| Abstract | Mill-cooked Eucalyptus calmaldulensis kraft pulp was pre-bleached with DOEp, and then bleached with D1D2 & D1P with and without intermediate washing. Effect of washing was studied with respect to brightness development, viscosity decrease and paper properties. Washing helped to get higher brightness, but made little difference on viscosity and paper properties. The chemical addition order for DP and PD final bleaching also studied. Chemical Neutralization was showed important for brightness improvement. Longer retention time for P stage gave brightness development; long retention time in D stage gave no benefit |
| Year | 2006 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Department of Food, Agriculture and Natural Resources (Former title: Department of Food Agriculture, and BioResources (DFAB)) |
| Academic Program/FoS | Pulp and Paper Technology (PP) |
| Chairperson(s) | Vilpponen, Aki |
| Examination Committee(s) | Malinen, Raimo O.;Lehtinen, Esa |
| Scholarship Donor(s) | Government of Finland-AIT Fellowship |
| Degree | Thesis (M. Sc.) - Asian Institute of Technology, 2006 |