03253nas a2200445 a 4500 20260817171612.0 100913s2008 th uu|m rtt 0| a1eng d .b1208248x AIT Thesis no.PP-08-1 Le Van Hiep Bleachability of kraft pulps : acacia auriculiformis and the mixture of acacia auriculiformis and eucalyptus camaldulensis Pathum Thani, Thailand : Asian Institute of Technology, 2008 1 online resource (53 leaves) : ill. Thesis ; no. PP-08-1 Submitted in partial fulfillment of the requirements for the degree of Master of Engineering Thesis (M.Eng.) - Asian Institute of Technology, 2008 Bleachability of kraft pulps cooked from different kinds of chip, namely Acacia auriculiformis, Eucalyptus camaldulensis, and their mixture was investigated. Cooking with the mixture of chips limited the development of brightness ceiling. The kappa factor in Do stage being suitable for acacia pulp with inlet kappa value 11.83 was 0.20. Similarly, end pH value in D₀ stage around 2.5 gave the best performance for D₀ bleaching. Hot acid treatment substantially increased brightness while strength properties did not suffer. By contrary, high temperature and long retention time in D₀ stage were only marginally improved pulp quality. Hot acid treatment without coupling a consequent washing stage also had a good tendency towards brightness but strength properties of bleached pulp was heavily suffered. Formaldehyde showed positive effect in term of improving pulp quality and it was a good suggestion for the saving of chlorine dioxide in ECF bleaching. Hydrogen peroxide did not significantly increase brightness when it was applied in final bleaching. The application of high temperature in D₁ stage of D₀EpD₁D₂ bleaching sequence increased pulp quality but marginally Kraft paper Acacia Eucalyptus camaldulensis Viljakainen, Esa, Chairperson Lehtinen, Esa, Examination Committee Malinen, Raimo O., Examination Committee Nazhad, Mousa M., Examination Committee Swedish International Cooperation Agency (SIDA), Scholarship Donor Asian Institute of Technology. Thesis ; no. PP-08-1 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B03664 .b1208248x mnait u 240329 0 100913 m a u 0 mnait mnait mnarc 20 40 Barcode : 30050120651525 CREATED : 2010-09-13 RECORD # : i12644535 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050120651533 CREATED : 2010-09-13 RECORD # : i12644547 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050160026182 CREATED : 2016-03-18 RECORD # : i12897760 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 12885 12885 0 0 0 0 MAIN MAIN mnait 2026-08-17 50.00 0 AIT Thesis no.PP-08-1 30050120651525 2026-08-17 17:16:12 1 2026-08-17 20 0 0 0 0 MAIN MAIN mnait 2026-08-17 50.00 0 AIT Thesis no.PP-08-1 30050120651533 2026-08-17 17:16:12 2 2026-08-17 20 0 0 0 0 MAIN MAIN mnarc 2026-08-17 0 AIT Thesis no.PP-08-1 30050160026182 2026-08-17 17:16:12 2026-08-17 40