03537nas|a2200421 i 4500 20260817163641.0 020215s1999 th uu m rtt 00| a1eng d .b11845703 AIT Thesis no. PP-99-6 Vo Quoc Lap An assessment of soda-anthraquinone pulping for mixed bamboo and hardwoods compared to kraft pulping Bangkok : Asian Institute of Technology, 1999 71 p. Thesis ; no. PP-99-6 A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Environment, Resources and Development Thesis (M.Eng.) - Asian Institute of Technology, 1999 Conventional soda pulping results in lower pulp yield and lower strength properties. Kraft pulping overcomes the problems but results in sulfur pollution. Anthraquinone (AQ) is used as an additive in soda pulping not only to enhance pulp yield and properties but cut down sulfur pollution. Laboratory studies on soda-AQ pulping of tropical mixed bamboo*, Eucalyptus Camaldulensis and Acacia Auriculiformic show that soda-AQ cook lowered the alkali demand by 2-4%, enhanced pulp properties and increased the pulp yield by 7-8% on OD raw material compared to conventional soda cook. AQ accelerated delignification, improved pulp yield, viscosity at a particular effective alkali and eliminated sulfur pollution. An addition of AQ as low as 0.05% on OD raw material gave soda-AQ pulp the same strength as kraft pulp with sulfidity of 20% for tropical acacia and eucalyptus. Pulping bamboo by soda-AQ process resulted in lower tearing resistance about 6-10 % compared to kraft. Sodium hydroxide used in soda-AQ cook was higher than that in kraft cook. The bleachability of pulp was improved by the addition of AQ to soda pulping but still lower than that of kraft. The high charge of chemicals required for the process (NaOH and Cl02) increases the cost of soda-AQ pulp. This study confirmed that AQ is a good additive in soda pulping for tropical bamboo and hardwoods but soda-AQ pulping is not cost competitive with kraft pulping. {u2022} Tropical mixed bamboo*: 33%Bambusa Procera Archer + 33% Dendrocalamus Membranaceus Munro+ 33% Neohouseaua Dullooa Kraft paper industry Anthraquinones Malinen, Raimo O., Chairperson Kolehmainen, Heikki, Examination committee Nazhad, Mousa M., Examination Committee Government of Finland, Scholarship donor Asian Institute of Technology. Thesis ; no. PP-99-6 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B12356 .b11845703 mnait u 240329 0 020215 m a u 3 mnait mnait mnarc 20 40 Barcode : 30050120651244 CREATED : 2002-02-15 RECORD # : i12270106 LPATRON : 1015322 LCHKIN : 2004-06-23 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 4 TOT RENEW : 1 Barcode : 30050120651236 CREATED : 2002-02-15 RECORD # : i12270118 LPATRON : 1026103 LCHKIN : 2016-08-15 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 5 TOT RENEW : 0 Barcode : 30050160025986 CREATED : 2016-03-18 RECORD # : i12897966 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 9352 9352 0 0 0 0 MAIN MAIN mnait 2026-08-17 50.00 0 AIT Thesis no. PP-99-6 30050120651244 2026-08-17 16:36:41 1 2026-08-17 20 0 0 0 0 MAIN MAIN mnait 2026-08-17 50.00 0 AIT Thesis no. PP-99-6 30050120651236 2026-08-17 16:36:41 2 2026-08-17 20 0 0 0 0 MAIN MAIN mnarc 2026-08-17 0 AIT Thesis no. PP-99-6 30050160025986 2026-08-17 16:36:42 2026-08-17 40