The effect of anthraquinone on kraft pulp bleachability and pollution abatement | |
| Author | Bui Thu Trang |
| Call Number | AIT Thesis no.PP-07-16 |
| Subject(s) | Kraft paper Pulping |
| Note | A thesis submitted in partial fulfillment of the requirement for the degree of Master of Science in Pulp and Paper Technology |
| Publisher | Asian Institute of Technology |
| Abstract | Laboratory pulping and bleaching results are reported using anthraquinone (AQ) as a pulping additive in kraft of Eucalyptus Camaldulensis hardwood. Using AQ allows a reduction of effective alkali or cooking time requirement for cooking to achieve the same kappa level. At the same cooking time, 19.1% effective alkali was saved. Simultaneously, AQ pulps properties after cooking were equivalent to kraft pulps. Kraft - AQ had slightly better in pulping yield due to the protected hemecellulose by AQ. The pulp used AQ had higher pentosan compared with kraft pulp at the same kappa level. The addition of AQ did not sacrificing pulp strength properties tested. Furthermore, AQ pulp bleachability and kraft pulp are similar in term of brightness and chemical consumption. The fully bleached pulp properties of kraft - AQ and kraft were equivalent. Tear strength of selected samples slightly decreased in case of 1.2% act.Cl charge in D1 stage. The reasonable of it may cause by the increased of hemicellulose content in pulp which easy to refining and cutting compared with kraft pulp. But in case of 1.5% active Cl charged, the different is negligible. Opacity and light scattering of AQ pulp were similar with kraft pulp. |
| Year | 2007 |
| 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) | Malinen, Raimo O.; |
| Examination Committee(s) | Lehtinen, Esa;Vilpponen,Aki; |
| Scholarship Donor(s) | Finland;AIT Fellowship; |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 2007 |