The effect of extractive content on the brightness reversion | |
| Author | Wang, Zhao-yang |
| Call Number | AIT RSPR no. PP-03-02 |
| Subject(s) | Pulping Sulphate pulping process |
| Note | A research study submitted in partial fulfillment of the requirements for the degree of Master of Engineering |
| Publisher | Asian Institute of Technology |
| Abstract | The effect of extractive content on the brightness reversion of kraft pulp of Eucalyptus camaldulensis and Acacia mangium has been studied by using the different Cl02 charge. The extractive content decreases by increasing of Cl02 charge, but the change is small. For eucalyptus, extractive content is from 0.33% to 0.21 %. For acacia, it is from 1.79% tol.39% when Cl02 charge increases from 18 a.Cl g/kg pulp o.d. to 60 a.Cl g/kg pulp o.d .. The relationship between extractive content and brightness reversion is not clear. The increasing of Cl02 charge in bleaching results in the decreasing of brightness reversion. When the Cl02 charge increased from 18 a.Cl g/kg pulp o.d. to 60 a.Cl g/kg pulp o.d., the PC value of eucalyptus pulp drop sharply from 2.47 to 1.07 and that of acacia pulp drop from 2.53 to 0.97. |
| Year | 2003 |
| Type | Research Study Project Report (RSPR) |
| 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) | Kolehmainen, Heikki |
| Examination Committee(s) | Malinen, Raimo;Viljakainen, Esa |
| Scholarship Donor(s) | Government of Finland I AIT Fellowship |
| Degree | Research Studies Project Report (M.Eng.) - Asian Institute of Technology, 2003 |